GWA
Gas-Fired Water Boilers –
Boiler Manual
5
Part Number 670 01 1001 00
Table 2
Corrosive contaminants and likely locations
To prevent potential of severe personal injury or death,
check for products or areas listed below before
installing boiler. If any of these contaminants are found:
• Remove contaminants permanently.
— OR —
• Isolate boiler and provide outside combustion air. See
national, provincial or local codes for fur ther
information.
Please review the following information on potential combustion air
contamination problems.
See Table 2 for products and areas which may cause contaminated
combustion air.
Air contamination
Air openings
Combustion air and ventilation openings must comply with Section
5.3, “Air for Combustion and Ventilation”, of National Fuel Gas Code
ANSI Z223.1–latest edition, or applicable local building codes.
Canadian installations must comply with B149.1 or B149.2
Installation Codes.
See table below for minimum combustion/ventilation air opening
sizes. Where openings are required, provide two (2) openings —
one within 12 inches of the ceiling, the other within 12 inches of the
floor, as shown in the table illustrations.
Provide adequate combustion and ventilation air to
assure proper combustion and reduce the risk of
severe personal injury, death or substantial property
damage caused by flue gas spillage and carbon
monoxide emissions.
Products to avoid
Spray cans containing chloro/fluorocarbons
Permanent wave solutions
Chlorinated waxes/cleaners
Chlorine-based swimming pool chemicals
Calcium chloride used for thawing
Sodium chloride used for water softening
Refrigerant leaks
Paint or varnish removers
Hydrochloric acid/muriatic acid
Cements and glues
Antistatic fabric softeners used in clothes dryers
Chlorine-type bleaches, detergents, and cleaning solvents found in
household laundry rooms
Adhesives used to fasten building products and other similar products
Areas likely to have contaminants
Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
Refrigeration repair shops
Photo processing plants
Auto body shops
Plastic manufacturing plants
Furniture refinishing areas and establishments
New building construction
Remodeling areas
Garages with workshops
1
Prepare boiler location
continued
GWA
Gas-Fired Water Boilers –
Boiler Manual
32
Part Number 670 01 1001 00
Figure 19
Trim assembly
12 Replacement parts
continued
Item
number
Description
Manufacturer
Manufacturer’s
par t number
International
Comfort
Products
par t number
1
Pressure relief valve, ASME, 30 PSIG, ¾" male inlet
Pressure relief valve, ASME, 30 PSIG, ¾" female inlet
(Fittings shown are factory-installed on boiler.)
Conbraco
Watts
10-407-10
M330
511546920WT
Conbraco
Watts
10-408-05
335
511546924WT
2
Combination pressure-temperature gauge, with 2½" short
shank
Ametek
ENFM
PTA-1088
4104
510218099WT
3
Drain valve, ¾"
(Fittings shown are included with boiler.)
Conbraco
Hammond Valve
Matco-Norca
Watts
31-606-01
710
205F04
BD-2C
511210423WT
4
Circulator (Fittings shown are shipped loose with boiler.)
Taco
007
511405113WT
5
Circulator gasket, universal (2 per boiler)
International Comfort Products
590317535WT
not
shown
Circulator hardware kit, includes:
2 flanges, 4 nuts, 4 screws, 2 pipe nipples —
1" NPT — GWA052 through GWA140
1¼" NPT — GWA175 through GW245
International Comfort Products
381354525WT
381354526WT
6
Circulator wiring harness
International Comfort Products
591319793WT
