24
GAS SUPPLY CONNECTIONS
Gas piping must have a sediment trap ahead of the
heater gas controls, and a manual shut-off valve locat-
ed outside the heater jacket. All gas piping should be
tested after installation in accordance with local codes.
CAUTION:
The heater and its manual shut-off valve
must be disconnected from the gas supply during any
pressure testing of that system at test pressures in
excess of 1/2 psi (3.45 kPa). Dissipate test pressure
in the gas supply line before reconnecting the heater
and its manual shut off valve to gas supply line. FAIL-
URE TO FOLLOW THIS PROCEDURE MAY DAM-
AGE THE GAS VALVE. OVER PRESSURIZED GAS
VALVES ARE NOT COVERED BY WARRANTY. The
heater and its gas connections shall be leak tested
before placing the appliance in operation. Use soapy
water for leak test. DO NOT use open flame.
NOTE:
Do not use Teflon tape on gas line pipe thread.
A pipe compound rated for use with natural and
propane gases is recommended. Apply sparingly only
on male pipe ends, leaving the two end threads bare.
A minimum of 4 in. WC and a maximum of 10.5 “WC
upstream pressure under load and no-load conditions
must be provided for natural gas. A minimum of
12 “WC and a maximum of 14 “WC are required for
propane gas under load and no-load conditions, with
no more than a 30% pressure drop between static
pressure and full load.
The factory manifold pressure settings should
be -0.40” ± 0.1” WC for either natural or propane gas.
SUPPLY PRESSURES
sidered are:
a) It reduces the chance of water infiltration, espe-
cially in snowy areas.
b) It relieves lot line restrictions.
c) It is easier to service the heater.
Care must be taken when locating the heater out-
doors, because the flue gases discharged from the
vent cap can condense as they leave the cap.
Improper location can result in damage to adjacent
structures or building finish. For maximum efficiency
and safety, the following precautions must be
observed:
1. Periodically check venting system. The heater’s
venting areas must never be obstructed in any
way and minimum clearances must be observed
to prevent restriction of combustion and ventilation
air. Keep area clear and free of combustible and
flammable materials.
2. Do not locate adjacent to any window, door, walk-
NOTE:
Condensate can freeze on the vent cap.
Frozen condensate on the vent cap can result in a
blocked flue condition.
way, or gravity air intake. The vent must be locat-
ed a minimum of 4 ft horizontally from such areas.
3. Install above grade level and above normal snow
levels.
4. Vent terminal must be at least 3 ft above any
forced air inlet located within 10 ft.
5. Adjacent brick or masonry surfaces must be pro-
tected with a rust-resistant sheet metal plate.