GWS-090E
Gas-Fired Water Boiler –
Boiler Manual
2
Part Number 550-110-737/1108
Codes & checklist
When servicing boiler —
1. To avoid electric shock, disconnect electrical supply
before performing maintenance.
2. To avoid severe burns, allow boiler to cool before per-
forming maintenance.
Boiler operation —
3. Do not block flow of combustion or ventilation air to
boiler.
4. Should overheating occur or gas supply fail to shut off, do
not turn off or disconnect electrical supply to circulator.
Instead, shut off the gas supply at a location external to
the appliance.
5. 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 that has been under water.
Boiler water —
6. DO NOT use petroleum-based cleaning or sealing com-
pounds in boiler system. Water seal deterioration will oc-
cur, causing leakage between boiler sections, circulator
flanges, diaphragm tanks or other system components.
This can result in substantial property damage.
7. DO NOT use “homemade cures” or “boiler patent
medicines”. Serious damage to boiler, personnel and/
or property may result.
8. Continual fresh makeup water will reduce boiler life. Min
-
eral 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.
9. Do not add cold water to hot boiler. Thermal shock can
cause sections to crack.
Glycol — potential fire hazard —
All glycol is flammable when exposed to high temperatures. If
glycol is allowed to accumulate in or around the boiler or any
other potential ignition source, a fire can develop. In order to
prevent potential severe personal injury, death or substantial
property damage from fire and/or structural damage:
• Never store glycol of any kind near the boiler or any
potential ignition source.
• Monitor and inspect the system and boiler regularly for
leakage. Repair any leaks immediately to prevent pos-
sible accumulation of glycol.
• Never use automotive antifreeze or ethylene glycol in
the system. Using these glycols can lead to hazardous
leakage of glycol in the boiler system.
1 Prepare boiler location
Read this first!
Installations must follow these codes:
• Local, state, provincial, and national codes, laws, regulations
and ordinances.
• National Fuel Gas Code, ANSI Z223.1–latest edition.
• Standard for Controls and Safety Devices for Automatically
Fired Boilers, ANSI/ASME CSD-1, when required.
• National Electrical Code.
• For Canada only: B149.1 or B149.2 Installation Code, CSA
C22.1 Canadian Electrical Code Part 1 and any local codes.
Read and follow the special instructions for the Com-
monwealth of Massachusetts, located on page 4
0
of this manual.
Certification
The GWS-090E boiler gas manifold and controls met
safe lighting and other performance criteria when
boiler underwent tests specified in ANSI Z21.13–
latest edition.
Before locating the boiler:
❏
Check for nearby connection to:
•
System water piping
•
Venting connections
•
Gas supply piping
•
Electrical power
❏
Check area around boiler. Remove any combustible materials,
gasoline and other flammable liquids.
Failure to keep boiler area clear and free of com-
bustible materials, gasoline and other flammable
liquids and vapors can result in severe personal
injury, death or substantial property damage.
❏
Boiler must be installed so that gas control system components
are protected from dripping or spraying water or rain during
operation or service.
❏
If new boiler will replace existing boiler, check for and correct
system problems, such as:
1. System leaks causing oxygen corrosion or section cracks from
hard water deposits.
2. Incorrectly-sized expansion tank.
3. Lack of antifreeze (when required) in boiler water causing system
and boiler to freeze and leak.
The boiler contains ceramic fiber and fiber-
glass materials. Use care when handling these
materials per instructions on page 21 of this
manual. Failure to comply could result in severe
personal injury.
Failure to adhere to the guidelines below can
result in severe personal injury, death or sub-
stantial property damage.
