Operating instructions for boilers type de. Production instruction for the operator of a gasified boiler house Production instruction for the operation of a hot water boiler
"I approve"
General manager
__________________
_____________________
PRODUCTION
INSTRUCTIONS
FOR SAFE OPERATION OF GAS EQUIPMENT BOILER ROOM WITH BOILER TYPE FERROLI (PREXTHERM RSW 469)
.
2011 r.
Operation of hot water boilers "Ferroli" Prextherm RSW 469 with Weishaupt WM G10 / 2A burner isp. ZM must be maintained in accordance with "PU and BE of steam and hot water boilers" and short instructions for the operation of hot water boiler plants. compiled by "Ferroli" "Rules for Gas Distribution and Gas Consumption Systems".
1.2. Observe the equipment maintenance deadlines specified by Ferroli
1.3. Observe the quality standards for feed and boiler water specified by Ferroli
1.4. Boilers that are not in operation must be in standby mode or mothballed.
Characteristics of the equipment.
There are two hot water boilers installed in the boiler room: two "Ferroli" Prextherm RSW 469 with a Weishaupt WM G10 / 2A burner isp. ZM. By means of the primary circuit pumps, water is forced into the boiler. It heats up and flows through the pipes to the heat exchanger.
Secondary circuit water is forcibly supplied to the heat exchanger by pumps of the second circuit and sent to heat the buildings.
Normal operating parameters of the boiler are given in the regime chart - individually for each boiler.
Scheme of safety automation and regulation of Prextherm RSW 469 boilers with Weishaupt WM G10 / 2A burner isp. ZM provides:
a) automatic start and stop of the boiler
b) positional control of the boiler power depending on the temperature of the water in the boiler according to the assignment, installed on the burner control panel.
v) automatic switching on/ switching off the boiler feed pump depending on the water pressure in the boiler.
d) emergency protection that stops the boiler in the event of emergency situations listed below:
when the temperature of the water leaving the boiler rises;
when the water pressure in the heating system decreases at the outlet of the boiler;
The air supply is regulated by an air damper, which is driven by a reversible motor. The same reversible engine, through a linkage mechanism, regulates the fuel supply using a cam regulating throttle. Thus, the supply of air and fuel is regulated in correct proportion for more efficient combustion.
Signs in accordance with GOST R 12.4.026-2001 must be posted at the entrance to premises that are dangerous in terms of gas contamination, prohibiting entry to these premises by unauthorized persons, smoking, breeding and the use of open fire. Unauthorized persons may be allowed into these territories only with the permission of the administration of the operating organization or the owner of the facility.
The boiler room and the territory for the placement of gas equipment must be kept in good condition and in proper cleanliness. Passages in and out of the boiler room must be free.
The boiler room should display: this instruction and a diagram of gas pipelines indicating the places of installation of valves, control and safety devices, etc. The valves and equipment should be numbered.
The boiler room must keep a "Gas Equipment Maintenance Log".
Maintenance of the gas equipment of the boiler room must be carried out within the time frame provided for in the schedule. In this case, at least once a year, scheduled equipment repairs with disassembly should be envisaged.
2. Description of the boiler room gas equipment.
The main gas-using equipment in the boiler room are hot water boilers of the company Ferroli type ( PREXTHERM RSW 469) ... Each of the boilers is equipped with a modulating gas burner Wm - G 10/2-A of the company " Weishaupt » (Germany), which supports fully automatic operation. The use of modulating burner operation increases the overall efficiency of the boiler room.
The following is installed on the gas pipeline to the boilers:
a) Ball valve (11) on the lower gas line to the boiler.
b) In accordance with the requirements of the "Rules for the use of gas and the provision of gas supply services in Russian Federation»The project provides for technological gas metering rotary counter DELTA G -40 (4).
v) Ball valve (13) on a purge plug located between the meter (4) and a ball valve (11) located in front of the boiler gas filter.
e) Safety, shut-off, ignition and control devices boiler burners.
The gas pipeline is equipped with:
Thermal shut-off valve KTZ 001-80-02 (1)
- solenoid valve KPEG50-P. (2)
Gas filter FG-16-50 (3)
Gas meter DELTA G -40 (4)
Safety shut-off valve Bullpen-50 (5)
Gas pressure regulator RDBK1-50M / 25 (6)
Safety relief valve PSK-50PS50 (7)
The boiler room is designed supply and exhaust system ventilation with natural impulse from the condition of 3-fold air exchange and supply the required amount combustion air for boilers. Air inflow into cold period year is carried out through the ventilation grill KVU-D-1. In the warm season, due to the ventilation grill and elements of the ventilation system VTS (deflector) type TA 315.
4. Scope and frequency of maintenance and repair.
To ensure it is necessary:
1.Once a month to produce:
To ensure correct and safe operation of the burner and normal work safety automation and boiler regulation, it is recommended to carry out the following measures:
MONTHLY:
· Checking safety automation by putting it into emergency mode with a log entry.
· Visual inspection of the condition of devices, boards and electrical wiring. Inspection of the state of relay circuits in control panels, tightness of impulse lines and their connections.
· Checking the serviceability of light and sound alarms.
· Checking the correct functioning of the automatic control systems by instrumentation, recording the flow of the controlled technological process.
Serviceability and correctness of readings of devices that control the most important parameters by setting the arrow to zero.
· Removal of dust from the outer surface of devices.
· External and internal inspection of devices and regulators, in order to determine the state of the available elements and assemblies.
· Inspection of rations and contact connections.
· Strength of fixing devices and sensors.
· Tightening the contacts of electrical connections.
· Inspection of moving parts of actuators.
· Adjustment of sensors and regulators in case of deviation of the equipment operating mode from the approved regime cards.
· Preventive work on instrumentation and control equipment, not related to repairs and changes in operating modes of boilers.
· Checking the technical condition of the gas equipment of boilers.
· Checking and preventive maintenance of the pumping groups.
· Checking the operation of the shut-off valve at the gas inlet to the boiler room.
· Checking the operation of CO and CH4 sensors.
· Checking the operation of the water treatment plant.
· Analysis of the water-chemical regime of the boiler.
QUARTERLY:
· Inspect and, if necessary, clean: the combustion head of the burner.
External inspection of the gas path of the burner for the presence mechanical damage, as well as for the presence of gas leaks (by soaping the connections)
· Checking the readings of the pressure gauges with another test pressure gauge.
· Rinsing the contact connections of the position indicator sensors with alcohol.
· Purging of impulse lines.
· Check the composition and temperature of the flue gases.
ANNUALLY:
· To carry out state verification of instrumentation and automation devices.
· Scheduled preventive maintenance of instrumentation and automation equipment.
· To carry out state verification of devices (sensors) of CO and methane gas contamination.
5. Gas supply to the boiler.
1. Before putting the burner into operation, complete and check all assembly work. The burner must be finally assembled and connected to all control and safety devices.
2. Make sure that the premises of the boiler room and the main control unit are not polluted with gases (using a gas analyzer or by smell).
3. After carrying out service work on the gas fittings and the connection points, it is necessary to carry out a tightness test. The ball valve and solenoid valves must be closed when performing a tightness test.
Control pressure in the fittings 100-150 mbar
Waiting time for pressure equalization 5 min.
Test time 5 min.
4. The results of the gas equipment leak test make a corresponding entry in the shift logbook.
5. Make sure that the boiler room and GRU are not polluted with gas (using gas analyzers or by smell).
6. Check the ball valve 11 (6) and 11 (7) on the lowering gas pipeline for leaks, to do this, close the valve 17 on the purge plug and the valve in front of the boiler burner, if the pressure gauge remains at "0" for 5 minutes - the ball valve 11 (6) and 11 (7) are sealed.
7. Check the valve in front of the boiler burner for leaks, to do this, open the ball valve 11 (6) and 11 (7), close the valve on the candle 17, close the ball valve 11 (6) and 11 (7), record the manometer readings, if within 5 minutes the pressure gauge reading does not change, the valve in front of the burner is hermetically sealed.
Note: If a leakage of gas equipment is detected, do not ignite the boiler, inform the person about it responsible for boiler room or a person replacing him.
Check the tightness of all joints with a soapy emulsion or with a gas analyzer. If a leak is found, take measures to eliminate it.
8. The results of the gas equipment leak test make a corresponding entry in the shift logbook.
9. Slowly (so as not to damage the gas meter (4)) open the above valves 11 (6) and 11 (7) on the lowering gas line to the boiler.
10. Slowly open the ball valve in front of the burner. Blow out the lowering gas line to the boiler through the spark plug (17) for at least 10 minutes.
11. Check the compliance of the gas pressure before the boiler with the safety settings (see Appendix)
12. Check the explosiveness of the gas leaving the sampler, for this:
a. Prepare a soapy emulsion in a bucket;
b. Place the sampler hose in the bucket and open the valve on the sampler;
c. Close the ball valve of the sampler, remove the hose from the bucket with soapy emulsion .;
d. Take the bucket out of the boiler room;
e. Set fire to soap bubbles.
Combustion of gas in soap bubbles should be calm without popping
PREPARATION FOR IGNITION.
Apply voltage to the boiler control panel (switch the key " Nutrition»To the On position).
Install the pump operation selection switch "MANUAL - AUTOMATIC" v
position " Machine».
Set the feed pump select switch to
"ON"... In this case, the pump will turn on and the corresponding lamp will light up, monitoring the operation of the pump.
Remove the boiler alarm signals by pressing the button " Alarm reset»Located on the boiler control panel. In this case, the inscription of the reason for the stop goes out.
Note: if the alarm is not reset, it is necessary to check and eliminate the cause of the alarm, then repeat the above operation.
FIRING THE BOILER.
Energize the burner control panel. To do this, press the button « ON\ OFF» located on the front of the burner control unit.
Button "Turning on the burner" press located on the boiler control unit:
a) The burner combustion manager starts (Weishaupt WM G10 / 2A vers. ZM).
b) after 10 - 15 seconds the burner fan will start and the actuator will open the air damper by 90 ° (degrees). The leak test program will start ( for boilers"Ferroli" Prextherm RSW 469 with Weishaupt WM G10 / 2A torch isp. ZM).
c) 40 seconds after the start of ventilation, with a positive check of the tightness control solenoid valves, the actuator will close the air damper to 10 - 15 ° (degrees).
d) A spark is supplied to the ignition electrode, while the main valve opens with a delay of 2 seconds through which gas is supplied to the boiler.
Note: The igniter will not be able to ignite if a flame or simulated flame has been detected during the pre-ignition purge period. If a flame is registered during this period, an emergency stop will occur.
Ignition period - Voltage is supplied to the ignition transformer and cut-off gas valves from the corresponding ignition terminal.
To continue the ignition period, the pilot flame must be registered and confirmed by the flame sensor within 3 seconds. If for any reason this does not happen, the system will shut down and an emergency lockout will occur.
With a confirmed pilot flame, the main burner flame is ignited and the main burner flame confirmation period begins. This period lasts 3 seconds for gaseous fuels. At the end of this period, if the flame sensor detects a flame, the burner switches to operating mode.
Note: If the main burner fails to ignite or remains ignited, the fuel shut-off valve will close. The flame hazard relay will lock out. Refer to Flame Loss Sequence
Period of operation - With a detected flame of the main burner, the combustion safety relay allows the reversing motor to go out of the minimum position.
The position of the reversing motor is controlled by a manual load regulator or an automatic load regulator, depending on the position of the manual-automatic control switch.
In the automatic position of the manual-automatic control switch, the position of the reversing motor (burner load) is under the command of the automatic load regulator. The air gate and fuel regulating valve are driven by a reversible motor using levers and a cam mechanism, providing a variable load.
e) With stable control of the torch after 10 sec. the actuator will switch the burner to minimum load and remain in it for 2 minutes.
As the boiler warms up, it is necessary to monitor its condition and, if necessary, after an increase in the water level, purge the boiler.
Then, upon reaching a pressure of 1.5-2 kg / cm.
After 2 minutes, the burner will switch to maximum load.
The burner start-up period is over. The shut-off valve signal lights remain lit. The burner operates according to the heat demand requirements.
Stop sequence. The burner burns fuel until the water temperature exceeds the load requirements.
After opening the operating limit sensors (water temperature), the following sequence occurs:
1. The main burner fuel shut-off valve circuit is de-energized, causing the shutoff valves to close. The flame goes out. The valve opening warning lights go off. The blower fan stops.
2.The combustion safety relay is ready for the next start and when the temperature water will fall by closing the thermostat probe, the burner will go through the normal start-up and operation sequence again.
Boiler start-up is over, make an entry in the shift journal.
6. Stopping the boiler.
Normal boiler shutdown by order of the person responsible for safe operation.
Button "Switch on the burner" move to the off position. Gradually close the boiler water inlet valve by 50%.
Close the control valve at the lowering of the gas pipeline to the boiler. Open the purge cocks on the purge plugs using the pressure gauges to check the absence of gas pressure, close the working valve.
Make an entry in the shift log, turn off the power to the boiler control unit by pressing the button « ON\ OFF» .
7. Emergency stop of the boiler
Emergency stop.
Button "Switch on the burner" translate into position "OFF".
Close the control valve at the lowering of the gas pipeline to the boiler. Open the purge valves on the purge plugs using the pressure gauges to check the absence of gas pressure, close the working valve.
Shut off the water from the boiler.
Inform the management of the reason for the emergency stop and act on their orders in the future. Make an entry in the shift log about the time and reason for the emergency stop of the boiler.
8. Shutdown in case of emergency.
In case of gas contamination of the boiler room: Turn off the power supply to the boiler room with a switch outside the boiler room, close the valve at the gas inlet to the GRU, open all windows and doors.
In the event of a fire in the boiler room: Close the valve at the gas inlet to the GRU, turn off the power supply to the boiler room with a switch outside the boiler room, call the fire brigade, take possible measures to extinguish the fire with the available fire extinguishing means.
The maintenance personnel are obliged to immediately stop the boiler in an emergency and immediately inform the head of the boiler room or the person replacing him about it in the following cases:
a) a sharp decrease or increase in gas pressure;
b) a sharp decrease or increase in water pressure;
c) fire in gas ducts;
d) gas explosion in the boiler furnace;
e) damaged gas equipment, boiler, valves, automation equipment;
Take all possible measures to eliminate the accident, notifying those responsible for the boiler room and gas facilities... Call emergency services if necessary.
In the event of an emergency, that is, violation of any of the boiler parameters monitored during operation (indicated in the protection parameter settings map), the fuel is cut off, a light signal of the root cause of the accident is turned on on the automation panel. In this case, it is necessary to close the valve at the lowering, open the valve of the purge plug.
Find out the reason for the emergency stop according to the indications of the warning lamps and devices. Take all necessary measures to eliminate it, guided by existing regulations... If necessary, call the representatives of the organization engaged in the maintenance of automation and gas equipment. Make an entry in the logbook indicating the reason for the stop.
After eliminating the cause of the accident, reignite in accordance with these instructions.
In the event of an emergency, an audible alarm and light indication corresponding to the type of emergency are turned on. The safety automation of the burner automatically cuts off the gas supply and within 10 minutes produces forced ventilation boiler furnace.
When triggered, " Boiler alarm no ...»It is necessary to check on the boiler control cabinet of this boiler which of the following alarms has been triggered:
- increase or decrease in gas pressure in front of the boiler;
- decrease or increase in water pressure after the boiler;
- the temperature of the water leaving the boiler is high;
- failure of the boiler recirculation pump.
- power outages;
After triggering " BOILER breakdowns»On the burner combustion manager it is necessary to look at the alarm code, then, according to the burner manual, look at the decoding of the alarm and, if possible, eliminate its cause. Press the button " Alarm reset»On the burner block and reset the alarm on the ША cabinet.
When an alarm is triggered Gas pressure min / max»Determine the actual gas pressure from the device showing the gas pressure to the boiler.
Note: In case of an accident " gas pressuremin»Check if the gas shut-off valve is open (opened by pressing the corresponding button on the cabinet SCHR), whether the bullpen in the GRU is cocked. Check the gas pressure at the inlet to the boiler room using the pressure gauge and whether the shut-off valves on the gas pipeline are open.
When an alarm is triggered "Gas pressuremax» slightly open the spark plug (17) (relieve the gas pressure) and start the burner with the spark plug (17) open (close the spark plug after the burner has ignited). If this alarm is triggered frequently, inform the person responsible for safe operation of gas distribution and gas consumption systems boiler room and call the representatives of the organization servicing the DUNGS burner block by tel. ___________
In case of accidents: " Gas contamination Methane" and " CO gas contamination» ( threshold 2) the gas shut-off valve is automatically closed (if the gas supply to the boiler room does not stop at the occurrence of the aforementioned accidents at the operators' control cabinet, close the valve before the gas is injected into the boiler room).
In the event of a prolonged power outage, the maintenance personnel must turn the switches of the pumps and burners to the zero position. After power supply - start them again, cock the shut-off valve.
At the first threshold " CO gas contamination»(The emergency light on the SCH cabinet will blink) an audible alarm will sound, while the second one will trigger the gas cut-off valve. This accident can be caused by leaks in boilers and gas ducts, smoking near the gas sensor or welding inside the boiler room. The maintenance personnel must ventilate the boiler room and start up the boilers again after the cause of the accident has been eliminated.
If an accident occurs " methane gas contamination”, It means that there is a gas leak in the boiler room. It is necessary to call the gas service by phone ________________-, notify responsible person for the gas facilities of the boiler room ________________, and inform the gas service of the service organization _________________ by tel. _________________
In case of fire - call the fire department by phone 01 , notify the person responsible for safe operation of gas distribution and gas consumption systems boiler room. The list of emergency situations on the computer in the control room will indicate where the fire occurred " Fire in the boiler room”.
Note: If there is no visual fire, then notify the person responsible for the gas facilities of the boiler room and call a representative of the instrumentation service ___________________
After clarifying and eliminating the causes of the emergency stop, by written order of the person responsible for safe operation of gas distribution and gas consumption systems boiler room or a person replacing him, ignite the burner in accordance with these instructions.
9. Obligations of the service personnel.
During the operation of the boiler room, the maintenance personnel must periodically measure and record the following parameters in the observation log:
a) water consumption, m3 / h;
b) direct water temperature, С;
c) temperature return water, С;
d) water pressure at the boiler inlet, kgf / cm2;
e) water pressure at the boiler outlet, kgf / cm2;
f) flue gas temperature, С;
g) burner parameters and other parameters (if necessary).
h) remove air from collectors and boilers.
1. Compare these records with given parameters regime chart of commissioning tests of the boiler room, analyze, identify the causes of unwanted deviations and, if possible, eliminate them.
Explanation: Monitoring parameters allows you to monitor technical condition boilers and maintain the required operating mode during operation. In particular, an increase in the pressure drop across the boilers indicates an increase in water consumption in the boilers, while the water pressure in the supply pipe of the heating network will decrease. Monitoring the flue gas temperature makes it possible to determine whether the boilers need to be cleaned.
Controlling the parameters of the burner (air and fuel), maintaining them in the range established during commissioning, allows high-quality combustion of fuel and effective work boilers.
2. A schedule should be drawn up for the boiler house, which indicates the frequency of checks of the automation, as well as the frequency of blowing the boilers, etc. The schedule is approved by the management of the operating enterprise. It is recommended to purge the boilers in operation at least once a day, and not to operate boilers with a reduced water consumption - at least twice a day.
3. Inform the person responsible for all emergencies. safe operation of gas distribution and gas consumption systems boiler room or a person replacing him.
10. Requirement of fire safety in the operation of gas equipment in the boiler room.
1. It is prohibited to store cleaning and combustible materials in the boiler room and GRU premises.
2. In the GRU premises, welding and other hot work is allowed in exceptional cases, only on the basis of a permit, with the obligatory adoption of measures to ensure the safety of the work.
11. Safety requirements for the operation of gas equipment in the boiler room.
1. The boiler room must be kept clean and there must be a 3-fold air exchange.
2. The floor should be covered with rubber mats or spark-suppressing material.
3. The air temperature in the room must be at least 5 ° C.
4. Work on the repair of electrical equipment of the GRU and replacement of burnt-out lamps should be carried out when the voltage is removed.
5. Entrance door to the GRU premises must be locked.
6. Gas pressure fluctuations at the outlet from the main control unit, exceeding 10% of the working pressure, are not allowed.
7. Manometers during operation must undergo state verification at least once every 12 months and checks after 6 months. The results of verification and testing are recorded in the "Journal of control checks of pressure gauges". A red line must be drawn on the pressure gauge glass, at the graduation corresponding to the operating pressure.
12. Responsibility for the implementation of these instructions and rules.
1. These instructions are binding on the persons responsible for the safe operation of the boiler room and boiler room operators.
2. Issuance officials instructions or orders forcing them to violate safety rules and instructions, as well as their failure to take measures to eliminate violations of the Rules and Instructions, which are allowed by employees or other subordinate persons in their presence, are gross violations of the Rules for the safe operation of hazardous production facilities.
3. Depending on the nature of violations and their consequences, all these persons are responsible for violation of the Rules for the safe operation of hazardous production facilities and this manual in the manner prescribed by the internal regulations of the enterprise and the legislation of the Russian Federation.
Made up:
Responsible person for safe
operation of gas equipment
gas consumption systems of the enterprise: _____________
Agreed:
Engineer: __________________
USER MANUALBOILER TYPE DE
General Provisions
1. The instructions contain general instructions for the operation of steam boilers of the DE type on the basis of which, in relation to specific conditions, taking into account instrumentation, for each boiler house its own production instruction is developed, approved by the chief engineer of the enterprise.
The production instruction and the operational diagram of the boiler room pipelines must be posted at the workplace of the boiler room operator.
2. Install, maintain and operate DE type steam boilers in accordance with the Boiler Regulations.
3. Instructions on the operation of the burner, economizer, automation system and boiler auxiliary equipment are contained in the relevant instructions of the equipment manufacturers.
4. Installation, maintenance and operation of boiler room pipelines should be carried out in accordance with the Rules for the Construction and Safe Operation of Steam and Hot Water Pipelines.
5. The owner of the boiler receives from the manufacturer a boiler passport, which, when the boiler is handed over to the new owner, is given to the latter.
The passport, in the appropriate section, indicates the number and date of the order of appointment, position, surname, first name, patronymic of the person responsible for the good condition and safe operation of the boiler, the date of testing his knowledge of the Boiler Rules.
The specified person enters into the Passport information on the replacement and repair of boiler elements operating under pressure, and also signs the results of the survey.
6. Acceptance of a newly installed boiler into operation must be carried out after its registration with the Gosgortekhnadzor authorities and technical certification on the basis of an act of the State or working commission on the acceptance of the boiler into operation.
The boiler is put into operation by a written order from the administration of the enterprise after checking the readiness of the boiler plant equipment for operation and organizing its maintenance.
7. In addition to the boiler passport in the boiler room, it is necessary to have a repair log, a water treatment log, a control check log of pressure gauges, a replacement log of the operation of boilers and auxiliary equipment.
8. Maintenance of boilers may be entrusted to persons at least 18 years of age who have passed honey. on certification, training and having a certificate for the right to service boilers in accordance with the requirements of subsection 9.2. Boiler rules.
Inspection and preparation for kindlingboilers type DE
1. Check the water supply in the deaerator, the serviceability of the feed pumps and the presence of the required pressure in the feed line, power supply of the automation panels and actuators;
2. Make sure that the boiler elements and fittings are in good condition and that there are no foreign objects in the firebox and gas ducts;
3. Check the condition and density of the screen between the furnace and the convective beam;
4. Check the integrity of the protective lining of the drum, the presence and thickness of the asbestos membrane of explosive safety devices;
5. Check the readiness for start-up and operation of the blower fan and the smoke exhauster. From the panel, test the remote control of the guide vanes, check the correctness of their adjustment for full opening and closing;
6.If the boiler is started up after repairs, during which the boiler drums were opened, then before closing them, make sure that there is no dirt, rust, scale and foreign objects; check the cleanliness of the pipe connecting the sections of the boilers with a steam capacity of 16 and 25 t / h; check the absence of damage to the elements of the steam separation and inside the drum devices and the loosening of the joints of the baffle plates, guide caps, the tightness of their abutment to the drum and the partition; Before installing new gaskets, carefully clean the junction plane from the remnants of the old gaskets; grease gaskets and bolts during assembly with a mixture of graphite powder and oil to avoid burning;
7. Check the correct installation and ease of rotation of the blower pipes. The axes of the nozzles of the blow-off pipes must be centered in the spaces between the boiler pipes;
8. Make sure of: normal condition of the burner parts, burner lance, front wall lining, drums;
9. Check the correct assembly of the burner nozzles.
In the GMP-16 burner nozzle, the pressure of the steam supplied to atomize the fuel affects the angle of the open fuel flame. With an increase in the steam pressure for spraying during ignition from 0.1 MPa (1 kgf / cm 2) to 0.25-0.3 MPa (2.5-3.0 kgf / cm 2), a decrease in the spray angle from 65 ° to 30 °, at which there is no coking of the walls of the two-stage fuel combustion chamber.
Visual control of the initial ignition zone and the exit edge of the embrasure or combustion chamber is carried out through the front hatch of the right side wall.
The temperature of the fuel oil in front of the nozzle should be within 110 -130 ° C, the viscosity should not exceed 3 ° VU;
10. After inspecting the firebox and gas ducts, close the manholes and hatches tightly;
11. After checking the serviceability of the valve, make sure that:
- the boiler purge valves are tightly closed, and in the presence of a superheater, the purge valve on the superheated steam chamber is open;
- the drain valves of the economizer and boiler are closed;
- boiler and economizer pressure gauges in working position, i.e. the pressure gauge tubes are connected by three-way valves with the medium in the drum and economizer;
- direct mode level indicators are on, i.e. steam and water valves (taps) are open and purge valves are closed;
- the main steam shut-off valve and the “auxiliary steam” valve are closed;
- economizer air vents are open.
To release air from the boiler, open the steam sampling valve on the drum and at the sample cooler.
12. Fill the boiler with water at a temperature not lower than + 5 ° С in the following sequence:
After turning on the feed pump (which is carried out according to the relevant instructions) and supplying water to the economizer, the valve of one of the supply lines opens slightly.
After the appearance of the clarified water, the economizer air vent is closed. The boiler is filled to the lower level in the direct-acting water level indicator glass. If the boiler is filled up for the first time after repairs, it is necessary to flush it by filling it twice with water until top level and dumping it through the purge and drain.
The time of filling the boiler with water and its temperature must be indicated in the order for kindling.
When filling the boiler, check the tightness of the manhole and hatch gates, flange connections, the tightness of the fittings (the passage of the latter can be judged by the heating of the pipes after the valves, if the boiler is filled with warm water).
If leaks appear in manhole and hatch gates and flange connections, tighten them; if the leak persists, interrupt the power supply to the boiler, drain the water and replace the gaskets.
After raising the water in the boiler to the lower mark of the level indicator, cut off the power supply to the boiler.
After that, you should check if the water level in the glass is kept. If it goes down, you need to find out the reason, eliminate it, and then recharge the boiler to the lowest level.
If the water level in the boiler rises when the feed valve is closed, which indicates a pass, it is necessary to close the previous valve along the way.
13. Check by switching on the serviceability of the main and emergency lighting;
14. Make sure that the instrumentation and control system of the boiler is in good working order, check the fuel cut-off using simulated parameters;
15. Check the serviceability of the boiler gas equipment and the ignition-protective device. If the boiler is preparing for firing up with fuel oil, let the fuel go through the circulation circuit;
16. Supply steam from neighboring boilers to the heating line of the lower drum and heat the water in the boiler to 95-100 ° C.
Preheating the water will reduce the thermal stresses in the metal of the lower boiler drum that arise during firing up due to temperature differences between the wall of the upper part, washed by hot combustion products, and the lower part, in contact with relatively cold water.
These instructions have been developed based on: - Rules technical exploitation thermal power plants, approved by the Ministry of Energy of Russia No. 115 of March 24, 2003 - Rules for the construction and safe operation of steam boilers with a steam pressure of not more than 0.07 MPa (0.7 kgf / cm 2), water-heating boilers, water heaters with a water heating temperature not higher than 338K (115 ° C ), approved by the Ministry of Construction of Russia No. 205 dated 28.08.92. 1.1. A person responsible for the safe operation of the boiler house from among the engineering and technical personnel of the EMU service should be appointed to the boiler room. 1.2. Persons at least 18 years of age are allowed to service the boiler house: the operator of the EMU boiler service and persons from the operational dispatch service who have been trained, have passed the exams of the attestation commission, have a certificate of the established form for the right to service boiler installations and are approved by order for the enterprise to perform these works. 1.3. The boiler is fired up before the heating season after the written permission in the passport of the boiler house of the person responsible for the safe operation of the boiler house. 1.4. Purpose of the boiler: production of high-temperature heat carrier (hot water); Type of fuel - natural gas; design parameters: water pressure, MPa (kgf / cm 2) - 0.7 (7.0) water temperature, ° С - up to 115 heating capacity, Gcal / h - 2.0. 1.5. Maintenance and repair of boiler equipment is carried out by: - heat and power equipment - by the EMU service; - instrumentation and automation by instrumentation and automation service; - gas equipment - by GDS service.
2.PREPARATION OF THE BOILER FOR OPERATION
2.1. In preparation for the start-up of the boiler room, it is necessary to carry out the FOLLOWING MEASURES: - ventilate the boiler room with a fan or by opening windows and doors for 10-15 minutes; - after ventilation with a gas analyzer, the gas content in the room is checked. - inspection of pumps, pipelines, supports, fittings, insulation of flange connections, filter-settler; - inspect all gas taps and valves, normal position - all purge plugs must be open; - after opening the valves at the inlet and outlet of the boiler, fill the heating system with network water, release the air through the air vents from the heating system - turn on circulation pump and bring the water pressure in the heating system to 2.0-4.0 kgf / cm 2 - conduct an external inspection of the gas equipment. 2.2. Before starting the boilers, an external inspection of the chimneys is carried out, and if there is a break for a long time, the internal surfaces are also inspected. Supports, expansion joints, a control valve, an explosion valve, insulation, manhole gaskets are subject to external inspection. There is a blocking that will prevent the boiler from starting when the control valve. 2.3. When gas is supplied, the valve opens and the corresponding valve to the boiler takes about 5-10 minutes to purge the gas pipelines, after which the valve for purging is closed. 2.4. When filling the network, it is necessary to open the valves. The supply of softened water to the boilers is carried out through the taps. When filling the network and the water circuit with water, close all valves to remove air. 2.5. To turn on the mains pumps, after filling with water - open the valves and close the valves and then turn on the selected mains pump 2.6. If during heating season adjust the temperature of hot water at the inlet and outlet from the boiler room, then the temperature of the water at the inlet to the network pumps should not exceed 80 ° C. 2.7. Turning off one mains pump automatically turns on the other. If both pumps fail, the control valve opens, to carry out natural circulation When the boiler room is turned off, the network pump is stopped and the shut-off valve is closed after it. 2.8. Network cold water flows through a settling filter, feed pumps (one is in operation, the other is in reserve), a heater, cation exchange filters and enters the suction manifold of network pumps.3. STARTING THE BOILER
3.1. Turn on the "NETWORK" toggle switch, turn off the network and audible alarm... In this case, the "MAINS" and "OPERATION" indicators light up and the program for monitoring the boiler status sensors starts. In case of deviation of the sensor parameters from the norm, the corresponding indication lights up. 3.2. After supplying fuel to the boiler burner, start the start-up program by moving the "START - STOP" toggle switch to the "START" position. 3.3. The boiler is started up and controlled by the KSUM-1 automatic equipment.4.BOILER OPERATION
4.1. The boiler is fully automatic. 4.2. Boiler automation is subdivided into: a) safety automation; b) automatic control. 4.3. Automatic temperature control includes: b) automatic switching on of the boiler; c) automatic maintenance of the supply water pressure in the return pipeline; a) automatic regulation of the temperature of hot water in the supply pipeline within the specified limits; d) automatic shutdown of the boiler from operation. 4.4. Safety automation includes: a) emergency automation; b) alarm automation. 4.5. Emergency automation includes; - protection for the lower pressure of air gas after the fan; - protection against emergency excess of water temperature (115 ° С); - contactor protection of the burner (interference in the burner). 4.6. Alarm automation includes: a) “burner failure” alarm; b) alarm of the gas supply system; c) alarm of circulation pumps; d) emergency signal of injection pumps; e) alarm of the upper and lower limits of the temperature of the hot water of the supply pipeline; e) low temperature alarm; g) alarm signal of the upper and lower limits of water pressure at the entrance to the boiler. 4.7. It is necessary to check the safety valve by “blowing” every shift. 4.8. During the operation of the boiler, it is necessary to monitor the pressure and temperature of the supply and return water supply. 4.9. More important parameters of water and gas in the boiler room are displayed on the control panel. 4.10. The operation of boilers and water heaters with faulty automation and equipment is not allowed! 4.11. When the boiler is turned off by the general boiler control device, the boiler is ignited by the operator after the end of the automatic stop program.5 STOPPING THE BOILER
5.1. To stop a boiler operating in an autonomous regulation mode, the operator must:- press the "stop" button on the front panel of the KSUM-1 unit, after which the stop program is executed automatically;
- close the tap on the burner;
- open the valve on the purge line;
- after the fan stops working, turn off circuit breaker power supply on the unit and the “Network” switch on the front panel of the KSUM-1 unit. In this case, the "Network" indicator light should turn off.
- Turn off after 30 minutes. circulation pump if the other boilers in the boiler room are not working.
6. EMERGENCY STOP OF THE BOILER
6.1. The emergency stop of the boiler is carried out automatically when the emergency automatic system is triggered in case of: - damage to the gas pipeline in the boiler room (gas contamination); - damage to the external gas pipeline to the boiler room; - destruction of the boiler; - spontaneous increase or decrease in pressure in the boiler room control cabinet; - an increase in the water pressure in the heating system above the permissible value; - a rupture of the heating main. 6.2. If the boiler operates in emergency mode and the emergency automatics do not work, it is necessary to turn off the emergency switch of the boiler room.Manufacturing instruction- the main document according to which the boiler room personnel must act. It stipulates general rules and specific actions of personnel in a given situation.
The given instruction is an example of a typical instruction for boiler room operators. The instruction is given to each operator personally in hands, against signature.
The main points of the production instructions for the operator of the gasified boiler house:
I. General Provisions.
The procedure for the operator's admission to work
The rights and obligations of the boiler operator
· The admission of unauthorized persons to the boiler room is allowed only if accompanied by the head of the boiler room with the permission of the administration.
· It is forbidden to engage in extraneous activities on duty.
II. Preparation for firing up (kindling) the boiler.
· The boiler is fired up only with a written order from the head of the boiler room.
Preparing to ignite the steam boiler
· Make sure that there are no people and foreign objects in the boiler furnace and gas ducts.
· Check the working order of the boiler and chimney lining.
· Check the condition of the explosion safety valves.
· Check the serviceability of the safety valves (by detonating).
· Test drives of air dampers of smoke exhausters and fans.
· Check the presence of natural draft in the firebox.
· Check the serviceability of the smoke exhauster and fans.
· Check the condition of the boiler headset.
· Check the serviceability of the shut-off valves on the boiler pipelines (supply, blowdown).
· Check the serviceability and activation of the water-indicating glasses.
· Check the operability of the automatic regulation.
· Make sure that the backup feed pump is working.
· Open the air vents on the upper drum of the steam boiler.
· Close the valve on the continuous blowdown line.
· Make sure there is water in the deaerator.
· Fill the economizer with water.
· Open the valve on the supply line.
· Fill the boiler with feed water. (For a steam boiler, the water level should be between the lower permissible level and the upper permissible level, slightly above the average value.
· Make sure that the water level in the boiler does not drop.
· Close the valve on the supply line.
Preparation for firing up a hot water boiler
· Check the condition of the boiler headset.
· Check the serviceability of the pipelines connected to the boiler. Make sure that there are no plugs on the pipelines.
· Check the serviceability of instrumentation.
· Check serviceability of safety automation.
· Check the serviceability of the mains pumps.
· Close the taps on the drain lines.
· Open the valve on the boiler inlet line.
· Open the valve on the boiler outlet line.
· Open the air vents. Wait until water flows steadily from the air vents and close them.
· Make sure there is water circulation through the boiler. The inlet water pressure must be higher than the outlet.
· Make sure there is no water leakage from the boiler.
· Fill the system with water using the booster pump.
· After creating pressure in the system, about 2.5 kgf / cm2, turn on the circulation pump.
· Make an entry in the log about the preparation of the boiler for firing up.
III. Firing up (kindling) the boiler.
· The boiler is fired up according to the written order of the head of the boiler room.
Firing up the steam boiler:
· Make sure that the boiler is full of water.
· Check the tightness of the shut-off valves. Record the results of the check in a removable log.
· The steam shut-off valve on the boiler must be closed.
· The valve on the continuous blowdown line must be closed.
· The valve on the boiler feed line must be closed.
· Open the valve on the squeegee line.
· The air vents on the steam boiler must be open.
· Check the serviceability of the water-indicating glasses.
Check the serviceability of the safety valves (by detonating)
· The boiler is fired up at minimum load.
· Close the air vents after steam has escaped steadily.
· At a steam pressure of 3 kgf / cm2, once again check the serviceability of the water-indicating glasses, check the safety valves by the detonation method.
· Carry out periodic boiler blowdown.
Ignition of hot water:
· When firing up the boiler, observe the inlet and outlet pressure and temperature.
· Monitor the water flow through the boiler. (by flow meter)
· Record the ignition result in the shift log.
IV. Putting the boiler into operation.
V. Boiler operation, maintenance.
· During the operation of the boiler, it is necessary to monitor the condition of the boiler, the operability of the safety automation, and the instrumentation.
· It is necessary to observe the operating mode of the boiler in accordance with the regime card and temperature schedule.
· Monitor the burners. Burning must be complete and stable.
· It is necessary to control the operation of pumps, smoke exhausters and fans.
· Periodically monitor the temperature and composition of the flue gases.
Steam boiler operation:
· It is necessary to maintain a normal water level in the steam boiler, to ensure uniform water supply to the boiler.
The water level should be at the horizontal axis of the upper drum.
· Perform periodic blowdown once per shift.
· It is necessary to control the work of the economizer. Monitor the pressure and temperature of the water entering and leaving the economizer. Write to the shift journal at least once per shift.
Hot water boiler operation:
· During the operation of the boiler, it is necessary to monitor the temperature of the water at the inlet and outlet of the boiler. The water in the boiler must not boil.
· Observe the pressure at the inlet and outlet of the boiler.
· It is forbidden to leave the boiler equipment unattended until the fuel has stopped burning and the boiler has cooled down.
Vi. Scheduled boiler shutdown.
· Should be carried out by written order of the head of the boiler room.
· The planned shutdown of the boiler is carried out with a gradual decrease in the load on the burners.
· Switch off continuous blowdown.
· Shut off gas supply at minimum load.
With a steady increase in steam pressure in the boiler, open slightly safety valves.
· If the temperature of the water in the economizer rises, open the discharge line.
· Ventilate the furnace and gas ducts - 10 - 20 minutes.
· After completion of ventilation, turn off the smoke exhauster and the fan, the guides must be closed.
· On a hot water boiler, you can turn off the water circulation when the water inlet and outlet temperatures are the same.
· The boiler must be supervised until it cools completely.
· Record information about the planned shutdown of the boiler in the shift log.
Draining water from the boiler:
· Drainage of water from the boiler is carried out according to the written order of the head of the boiler room.
· Open the air vents and the shut-off device on the drain line and drain the boiler.
Vii. Emergency stop of the boiler.
Emergency stop is performed immediately, without a gradual decrease in load
and without the written permission of the head of the boiler room.
Emergency stop of the steam boiler:
· If the safety valve is defective.
· Extinguishing the flame on the burner.
· Failure of all feed pumps of the steam boiler.
· Raising the pressure in the boiler drum above the permissible level by 10% with the continuation of the increase.
· Decrease of the water level in the upper drum below the lower permissible level.
· The water level in the upper drum rises above the upper permissible level.
· Failure to operate all water level indicators.
· Switch off fans.
· Shutdown of smoke exhausters.
Emergency stop of the hot water boiler:
· The increase in water pressure at the outlet of the boiler is higher than the permissible one.
· Decrease in water pressure at the outlet of the boiler below the permissible level.
· Increase in the water temperature at the outlet of the boiler to a value of 20 ° C below the boiling point (in accordance with the working water pressure).
· Malfunction of safety automation.
· Power outage.
· Fire in the boiler room. In the event of a fire, personnel must act in accordance with these instructions and the plan for the elimination and localization of emergency situations.
· Make an entry in the shift log about the time and reason for the emergency stop of the boiler.
· Report to the head of the boiler room.
VIII. Reception and delivery of the shift.
· Inspect all equipment in operation, as well as in reserve and under repair.
View all log entries since the last watch
· Clarify the current situation in the boiler room orally.
· Make an entry in the journal about the acceptance of the shift.
IX. Final provisions.
· Maintenance personnel of the boiler house is responsible for violation of the requirements of the production instructions in accordance with the requirements of the internal labor regulations - material, administrative and in accordance with the law.
The boiler operation manual is a set of rules and requirements that are attached in printed form to each model. Despite the variety of gas heating equipment, the principles of use and safety are the same for all models.
The principle of the boiler
Gas heaters may differ structurally and in technical parameters, but the principle of creating heat in a house is the same - heating the coolant (water / antifreeze) with combustion gas (natural / liquefied). The supply of gaseous fuel to a dwelling is not the easiest and safest thing to do, but consumers are attracted by gas, its comparative cheapness and versatility.
Blue fuel can be used not only for heating, but also for heating domestic water using columns or double-circuit models of heaters. Modern equipment is equipped with effective security systems that prevent all possible emergencies. Nevertheless, there are operating rules that are mandatory and are a guarantee of safe operation.
Precautionary measures
Despite the manufacturers' commitment to safety gas appliances, they can still become a source of danger. The Ministry of Emergency Situations regularly reminds the owners of any gas-powered equipment about the precautions:
- It is necessary to buy gas-fired appliances from organizations that have an appropriate sales license.
- Installation should only be carried out by qualified personnel.
- The set should include an instruction manual.
- It is forbidden to change the structure of the device in any way.
- A technical check must be carried out annually.
- It is forbidden to reduce ventilation openings in windows and walls.
- In the presence of sealed windows, it is necessary to organize the flow of air.
- Materials that can quickly ignite must not be stored in the boiler room.
- It is forbidden to increase the temperature of the heating medium over 90 ° C.
Accommodation rules
- The area of the room in which the heater is installed is at least 7.5 m².
- Ceilings - from 2.2 m.
- There should be a window that allows air access from the street.
- The door should open in the direction of the movement of a person leaving the room.
- It is forbidden to equip switches in the boiler room. If they are already installed, they will have to be taken out of the room.
- It is necessary to equip supply and exhaust ventilation... For each m³ of consumed fuel - 15 m² of air.
- The distance from the heater to elements capable of burning is 25 cm or more. Up to non-combustible elements - 5 cm.From the chimney to combustible parts - 40 cm, to non-combustible - 15 cm.
- The device is mounted on a perfectly flat surface, without slopes.
Chimney requirements
- Chimney material - steel. It is recommended to use stainless steel.
- Cleaning hatches and condensate drainage are required. There should be a pocket at the bottom of the chimney in which deposits accumulate.
- The chimney is equipped with external thermal insulation, which is protected from moisture (condensation, precipitation).
- Chimney height - from 5 m and at least 2 cm above the outlet.
- The chimney is installed on the receiving plate of the vapor trap.
- The expansion tank is installed at the highest point in the system.
- A safety group and a thermometer are installed on the supply pipeline.
- It is undesirable to place the device in openings, niches and other hard-to-reach places.
How to use
V modern models heaters, human involvement is minimized. Before the device is started, it is connected to:
- gas pipeline - employees of the gas service;
- heating pipes;
- water supply - representatives of organizations serving heating systems.
The first start-up is also carried out by service workers. If during connection and maintenance the requirements of the instructions are violated, the warranty will be canceled. The equipment should only be used for the purposes specified by the manufacturer.
During installation, maintenance and repair, original spare parts must be used. If a breakdown or incorrect operation is found, the user should immediately turn off the gas with a valve and call the service or gas service. Produce renovation work yourself is strictly prohibited.
When performing any work on or near the air duct or chimney, it is compulsory to turn off the gas. After completing the work, they check the functionality of the chimney and air duct and only then proceed to start the device.
How to turn off the boiler correctly
If the device will not be used long time, perform the following actions:
- Close the gas valve.
- If the equipment is volatile, disconnect the automation and the water pump from the mains.
- Shut off the water supply and heating valves.
- If the temperature is expected to drop below zero, you will have to drain the water.
- Call a specialist to turn off the equipment permanently.
The heater is also turned off for cleaning. Clean it with a damp cloth with a soft detergent and soap. It is forbidden to use aggressive substances.
Safety system
Gas powered appliances need serious monitoring. It is provided either by a person or by an automation system. The latter is capable of providing multi-stage protection that prevents dangerous situations and improves the safety of the equipment. The main task of the protection system is to turn off the device in time by stopping the fuel supply.
Consider the steps of protection using an example floor boiler"Wolf KSO". These modern devices have multi-stage protection. One of the stages is an ionization sensor that monitors the flame. If the fire goes out, a signal will be given to the control unit, it will cut off the fuel supply and prevent an accident.
The combustion chamber has a temperature sensor that monitors the heating of the coolant and does not allow the furnace to burn out quickly. "Wolves" are equipped with a KTD system - chimney draft control. It prevents the accumulation of carbon monoxide gases. If there is no draft, the accumulation of combustion products in the chimney begins, the thermostat heats up. When the temperature limit value is reached, the thermostat contacts open - the flow of fuel stops.
Automatic protection
Modern heater models are saturated with electronic instrumentation that generates signals for the control unit. Automation, receiving signals from sensors, coordinates the work of all units. Safety valves, expansion tanks, air valves, smoke detectors and other devices are the elements that prevent various kinds of malfunctions and problems.
What to do if malfunctions appear
Consider situations with breakdowns using the example of Italian boilers. Italian wall and floor heaters are an example of quality and efficiency. But even with correct use, malfunctions may occur that require prompt elimination.
The following problems may appear in Baksi models:
- the burner does not ignite;
- while working in the firebox, pops are heard;
- the boiler is overheated;
- the device makes a lot of noise;
- the sensor is out of order.
The probable causes of breakdowns are associated both with violations of the operating rules and with reasons beyond the control of the user:
- moisture has entered the device;
- low quality of the coolant;
- decreased pressure in the gas pipeline;
- voltage drop in the power grid;
- errors were made during installation.
Violation of at least one rule or norm leads to breakdowns, incorrect operation and unnecessary costs.
Frost protection
One of important rules operation of heating systems - ensuring minimum permissible temperature coolant. If water is poured into the system, then at low temperatures freezing occurs, pipes and radiators become unusable. In modern models, this problem is solved - the user is relieved of the need to monitor the coolant.
So, for example, the boilers of the South Korean manufacturer provide reliable protection from freezing. "Navien" is cheaper than European counterparts, but these boilers have all the necessary protection functions, which greatly simplifies use.
When the temperature of the heating medium drops below 10 ° C, the circulation pump starts automatically. If the coolant cools down to 6 ° C, the burner will automatically turn on, heating the coolant to 21 ° C.
Ignition instructions
Heaters differ in the type of ignition, so there are nuances when starting different modifications. Before turning on the device, you need to read the ignition instructions in order to do everything right. Let's consider firing up on the example of the Italian boiler "". It is important to check the system for leaks before switching on. For this purpose, the thermostat is turned on to the maximum so that the changeover is automatically triggered. Ariston ignition process:
- the appliance is connected to the mains, and the heating regulator is set desired value temperature;
- a small noise is heard when the pump is turned on;
- when all are eliminated in the pipes air locks, the noise will disappear;
- electric ignition is triggered - the boiler turns on independently.
Self-diagnosis
The operation of the heaters is simplified if they have a self-diagnostic function. Almost all European manufacturers have equipped their products with it.
So, for example, German heaters "", displaying error codes on the display, allow the user to quickly understand the cause of the problem and take measures to eliminate it. If code A7 appears on the screen, it is clear that the hot water temperature sensor is faulty.
If A8 is highlighted, the connection to the BUS-bus is broken. This feature greatly simplifies the use of gas equipment, makes it easier and more comfortable.
Dangerous situations
The greatest risk is burner malfunction. If the flame goes out, gas may accumulate in the room, which will subsequently cause an explosion. Reasons for extinguishing the fire:
- the gas pressure has dropped below the permissible norm;
- there is no draft in the chimney;
- the supply voltage has disappeared;
- the igniter went out.
In an emergency, it is necessary to immediately shut off the fuel supply to the burners - automatically or manually. Modern versions are equipped with automatic devices necessary for prompt shutdown of equipment. The operation of such devices is not only convenient, but also safe.
How to prevent gas build-up in a room
Modern safety standards provide for the installation of gas analyzers in boiler rooms, they are necessary for signaling when gas appears in the room. A special electronic valve reacts to their signals, automatically stopping the flow of fuel to the burners.
What other safety rules are there?
- Do not disassemble or dismantle gas appliances yourself.
- Handle the power cord with care.
- Do not place foreign objects on top of the appliance.
- Do not step on the boiler. Do not step on chairs, tables or other unstable objects to clean the wall-mounted kettle.
- Watch the coolant, add it to the system in time.
- Be careful - in some modifications the use of antifreeze is prohibited.
- If you smell gas, immediately turn off the gas, open windows and doors. Exit the boiler room and call the gas service.
