Utica Boilers MGB Series II/MGC Series 安装指导

23

Beginning of heating season visually check pilot end 

main burner flames. See Figure 16.

Refer to page 7 for important information. To test 

safety relief valve refer to valve manufacturer’s in-

structions packaged with relief valve. Call Technical 

Support if manufacturer’s instruction are not located.

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 fittings. Tighten as 

necessary. 

Open valve between boiler and tank. Water 

will rise to normal height in tank if you have 

automatic fill valve (otherwise, manually refill 

system).

Recommend following checked annually by qualified 

service agent. 

• flue 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.

Venting and piping should be checked at least once 

a season. If vent piping shows any sign of leaking, 

replace immediately. 

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).

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 draft diverter and intermediate front panel 

as a unit. 

• Carefully remove cerafelt gasket strips. 
• Clean passageways between sections with flexible 

handle wire brush. Remove dirt from bottom of 

boiler and from between sections by vacuuming. 

• Verify all flame 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 flames after reassembly. See Figures 16 

and 17, page 21. 

• Verify vent pipe connections to chimney are secure 

and no obstructions are present.

• Keep boiler area clear and free from combustible 

materials, gasoline and other flammable vapors 

and liquids.

• Keep boiler area clear of debris and other 

materials obstructing flow of combustion and 

ventilation air.