Lennox International Inc. GSB8-S 사용자 설명서

28

Keep boiler area clear and free from combustible materials, 

gasoline and other fl ammable vapors and liquids. Keep 

boiler are clear and free of obstructions to fl ow of 

combustion and ventilation air.
Check the water level every day or two. Verify the water 

line shown by operating the drain valve on the gauge. BE 

SURE TOP AND BOTTOM VALVES ON GAUGE ARE ALWAYS 

OPEN SO THAT ACTUAL WATER LEVEL WILL BE SHOWN AT 

ALL TIMES.
The gauge glass should be dry above the water line. The 

water line should not bounce more than about one inch 

when the boiler is steaming. If you see water droplets 

carrying over through the top of the gauge glass, or 

excessive bouncing of the water line, the boiler needs to 

be cleaned. Follow the instructions under “Cleaning Your 

Boiler.”

SAFETY VALVE
Before testing, make certain discharge pipe is properly 

connected to valve outlet and arranged to contain and 

safely dispose of boiler discharge. Under normal operating 

conditions a “try lever test” must be performed every 

month. A “try lever test” must also be performed at the 

end of any non-service period. Test at normal system 

operating pressure by holding the test lever fully open 

for at least fi ve seconds to fl ush the valve seat free of 

sediment and debris. Then release lever and permit the 

valve to snap shut. If lift lever does not activate, or there 

is no evidence of discharge, turn off boiler immediately and 

contact a licensed contractor or qualifi ed service personnel.

LOW WATER CUT-OFF
The Low Water Cut-Off will interrupt the electrical current 

to the burner when the water line in the boiler drops to a 

low level.
On fl oat type low water cutoffs, it is very important to 

keep the fl oat chamber free from sediment, a condition 

essential to dependability. To keep any accumulation from 

interfering with fl oat action is to “BLOW DOWN” or fl ush out 

the control regularly. This must be done two to three times 

during the fi rst week after installation and once a week 

thereafter during the heating season. Do it while the boiler 

is in operation. First note water level in gauge glass. Open 

blow-off valve at bottom of control; water will pour out, 

fl ushing away sediment. Drain until water is clear, about a 

pailful, then close valve. If water level in gauge glass has 

dropped, add water to boiler to restore level. Consult low 

water cut-off manufacturer’s instructions included with 

boiler.

NOTE: Opening blow-off valve checks cut-off operation 

too. As fl oat drops with falling water level, burners will shut 

off. After valve is closed and normal operating conditions 

are restored, burners will resume fi ring. For probe type 

Low Water Cutoffs, check action of the Low Water Cut-Off 

monthly to make sure it is providing the proper protection. 

See “Checking and Adjusting” on page 19. Low Water Cut-

Off remote probes must be removed for periodic inspection 

and cleaning, preferably at the beginning of each heating 

season. More frequent cleaning may be required on boilers 

requiring constant or very frequent additions of make up 

water.

BURNERS
A visual check of the pilot and main burner fl ames should 

be made at least once each year, preferably at the begin-

ning of the heating season. See page 19.

BOILER FLUE PASSAGES
Under normal operating conditions, with the burners 

properly adjusted, it should not be necessary to clean the 

boiler fl ue gas passages. However, to assure trouble-free 

operation, we recommend that you have the fl ue passages, 

burner adjustment, 
and operation of the controls checked once each year by a 

competent Service Technician.
Before the start of each season (or whenever system has 

been shut down for some time) recheck the whole sys-

tem for leaks . . . and recheck the boiler and vent pipe for 

leaks.

VENT PIPE
The venting of this unit is very important and the piping 

should be checked at least once a season. If the vent pip-

ing shows any sign of leaking, replace it immediately.

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 

the two screws attaching the intermediate front panel to 

the left and right side jacket panels. Remove the draft 

diverter and intermediate front panel as a unit. Carefully 

remove the cerafelt gasket strips. Clean passageways 

between sections with a fl exible handle wire brush. Remove 

dirt from bottom of boiler and from between sections by 

vacuuming. Make sure 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 

400F RTV silicone sealant. Reassemble all parts. Be sure to 

check tightness of pilot connections and condition of burner 

fl ames after reassembly (see Figures 18 and 19). 
Be sure vent pipe connections to chimney are secure and 

no obstructions are present.