Weil McLain CGs User Manual

CGa, CGi, CGs, EG,  
EGH, LGB, PEG, PFG  
Gas-Fired Boilers  
User’s  
Information  
Manual  
If the information in this manual is not followed exactly, a fire or  
explosion may result, causing property damage, personal injury or  
loss of life.  
Do not store or use gasoline or other flammable vapors and liquids in the  
vicinity of this or any other appliance.  
WHAT TO DO IF YOU SMELL GAS  
Do not try to light any appliance.  
Do not touch any electrical switch; do not use any phone in your  
building.  
Immediately call your gas supplier from a neighbor’s phone. Follow  
the gas supplier’s instructions.  
If you cannot reach your gas supplier, call the fire department.  
Installation and service must be performed by a qualified installer, service  
technician or the gas supplier.  
Part Number 550-110-592/1000  
STOP!! Read before proceeding  
Failure to adhere to the guidelines on this page can result in severe personal injury, death or substantial  
property damage.  
Air contamination  
Products to avoid  
To prevent potential of severe personal injury or death, check for products or  
areas listed in table at right before installing boiler. If any of these contaminants  
are found:  
Spray cans containing chloro/fluorocar-  
bons  
Permanent wave solutions  
remove contaminants permanently.  
isolate boiler and provide outside combustion air. See national, provincial or  
local codes for further information. OR —  
for CGs boilers only combustion air may be ducted from outside to the  
boiler air intake.  
OR —  
Chlorinated waxes/cleaners  
Chlorine-based swimming pool chemicals  
Calcium chloride used for thawing  
Sodium chloride used for water softening  
Refrigerant leaks  
Service and maintenance  
To avoid electric shock, disconnect electrical supply before performing  
Paint or varnish removers  
maintenance.  
To avoid severe burns, allow boiler to cool before performing maintenance.  
Hydrochloric acid/muriatic acid  
Cements and glues  
You must maintain the boiler as outlined in the manual and have the boiler  
started up and serviced at least annually by a qualified service technician  
to ensure boiler/system reliability.  
Antistatic fabric softeners used in clothes  
dryers  
Boiler operation  
Chlorine-type bleaches, detergents, and  
cleaning solvents found in household  
laundry rooms  
Do not block flow of combustion or ventilation air to boiler. This boiler is  
equipped with a control which will automatically shut down the boiler should  
air or vent be blocked. If vent or air blockage is easily accessible and removable,  
remove it. The boiler should attempt to restart within an hour. If blockage is  
not obvious or cannot be removed, have the boiler and system checked by a  
qualified service technician.  
Adhesives used to fasten building products  
and other similar products  
Areas likely to have  
contaminants  
Should overheating occur or gas supply fail to shut off, do not turn off or  
disconnect electrical supply to pump. Instead, shut off the gas supply at a  
location external to the appliance.  
Dry cleaning/laundry areas and establish-  
ments  
Do not use this boiler if any part has been under water. Immediately call a  
qualified service technician to inspect the boiler and to replace any part of the  
control system and any gas control, which has been under water.  
Swimming pools  
Metal fabrication plants  
Beauty shops  
Have the building monitored when it is vacant for an extended period. Safety  
controls can shut down the boiler at any time. The loss of heat can result in  
significant damage due to freezing.  
Refrigeration repair shops  
Photo processing plants  
Auto body shops  
Boiler water  
DO NOT use petroleum-based cleaning or sealing compounds in boiler system.  
Water seal deterioration will occur, causing leakage between sections and damage  
to heating system components. This can result in substantial property damage.  
Plastic manufacturing plants  
DO NOT use "homemade cures" or "boiler patent medicines". Serious damage  
to boiler, personnel and/or property may result.  
Furniture refinishing areas and establish-  
ments  
Continual fresh makeup water will reduce boiler life. Mineral buildup in  
sections reduces heat transfer, overheats cast iron, and causes section failure.  
Addition of oxygen and other gases can cause internal corrosion. Leaks in boiler  
or piping must be repaired at once to prevent makeup water.  
New building construction  
Remodeling areas  
Do not add cold water to hot boiler. Thermal shock can cause sections to  
crack.  
Garages with workshops  
Part Number 550-110-592/1000  
3
Boiler components  
59211  
59210  
1
Gas valve  
2
Pilot burner  
3
Main burner  
4
Gas manifold/orifices  
Control module  
5
6
Inducer (CGi and CGs only)  
Vent damper (CGa only)  
Water temperature limit switch  
Transformer  
7
8
9
10  
11  
12  
15  
16  
17  
18  
Spill switch (CGa only)  
Air pressure switch (CGi and CGs only)  
Rollout thermal fuse element  
Draft hood (CGa only)  
Circulator  
Relief valve  
Gauge (pressure or pressure/temperature)  
4
Part Number 550-110-592/1000