Справочник Пользователя для Lennox International Inc. GWB8-187IE-2

Burners
Beginning of heating season visually check pilot and main 

burner fl ames.  See Figures 13, and 14.

Safety Relief Valve
Test safety relief valve for proper operation.  Refer to valve 

manufacturer’s instructions packaged with relief valve.

Expansion Tank (Non-diaphragm)
Tank may become waterlogged, or may receive excess 

of air. Frequent automatic opening of safety relief 

valve indicates water logging. High boiler temperature 

accompanied by unusually low radiation unit temperature 

(and “knocking”) indicates excess air in tank.
To correct:

Close valve between boiler and tank. Drain tank until 

empty. 

Check all tank plugs and fi ttings. Tighten as necessary. 

Open valve between boiler and tank. Water will rise to 

normal height in tank if you have automatic fi ll valve 

(otherwise, manually refi ll system).

Boiler Flue Passages
Recommend following checked annually by qualifi ed service 

agent. 

• fl ue passages 
• burner adjustment
• operation of controls

Before start of each season (or whenever system has been 

shut down for some time) recheck whole system for leaks 

and recheck boiler and vent pipe for leaks. Replace or patch 

any boiler seals that are faulty. Before start of each season

(or whenever system has been shut down for some time) 

recheck the whole system for leaks . . . and recheck the 

boiler and vent pipe for leaks. Replace or patch any boiler 

seals that are faulty.

Vent Pipe
Venting and piping should be checked at least monthly. If 

vent piping shows any sign of leaking, replace immediately. 

Water System
If system is to remain out of service during freezing 

weather, always drain it completely (water left in to freeze 

will crack pipes and/or boiler).   

Cleaning Your Boiler And Burners
Flue passages between sections should be examined yearly 

and cleaned if necessary. 
To clean: 

• Remove burners, pilot, and vent pipe.
• Remove top and front jacket panels. 
• Remove two screws attaching intermediate front panel 

to left and right side jacket panels. 

• Remove control panel. 
• Remove draft diverter and intermediate front panel.
• Carefully remove cerafelt gasket strips. 
• Clean passageways between sections with fl exible 

handle wire brush. Remove dirt from bottom of boiler 

and from between sections by vacuuming. 

• Verify all fl ame ports in burners are open and clear. 

Shake out or blow out all loose dirt in burners. 

• Reseal seams between adjacent sections as necessary 

with 400

°

 F RTV silicone sealant. 

• Reassemble all parts. 
• Verify tightness of pilot connections and condition of 

burner fl ames after reassembly. See Figures 13 and 14. 

• Verify vent pipe connections to chimney are secure and 

no obstructions are present. 

Blower 
Blower motor features permanently lubricated ball bearing 

construction. Lubrication is not required. 

Circulator Pump Isolation Valves
Operate isolation valves in circulator pump fl anges 

manually once or twice per year to prevent valves from 

becoming stuck in open position 
Rotate valves from open position to closed position and 

back to open position.

Low Water Cutoff(s)
Inspect fi eld sourced low water cutoffs annually or 

as recommended by low water cutoff manufacturer.  

Flush fl oat type low water cutoff(s) per manufacturer’s 

instructions.

• Keep boiler area clear and free from combustible 

materials, gasoline and other fl ammable vapors and 

liquids.

• Keep boiler area clear of debris and other materials 

obstructing fl ow of combustion and ventilation air.