Sterling SHR150, Owner'S Manual

Page: 10 / 17

TESTING FOR LEAKS
WARNING
All gas piping and connections must be tested for
leaks after the installation is completed.
DO NOT use a match or open flame of any kind to
test for leaks. Never operate the heater with leaky
connections.
Failure to follow these warnings could result in prop-
erty damage, bodily injury or death.
1. Disconnect the heater and the manual shut off
valve from the gas supply piping system during
any pressure testing .
2. Isolate the heater from the gas supply piping
system by closing the manual shut off valve
during any pressures equal to or less than 1.2
psig.
3. For Steps 4 and 5, apply a soap solution
to all connections and joints. If bubbles
appear, leaks have been detected and
should be corrected.
4. The supply system should be checked
first with the heater gas valve turned
OFF.
5. After the supply is checked, turn the
heater gas valve ON and check the
heater piping and controls while unit is in
operation.
6. The opening between the pipe and the
wall, or floor, through which the gas
piping is inserted should be sealed by
caulking.
MANIFOLD PRESSURE CHECKING
Be sure to check the manifold pressure with a
water manometer to verify proper operation of the
heater.
A pressure regulator is an integral part of the
automatic valve on all models for both Natural
and LP Gas. This pressure regulator will com-
pensate for minor fluctuations in input pressure,
but is NOT a suitable substitute for the line pres-
sure regulator on a Natural or LP gas line.
1. The manifold pressure can be meas-
ured at the 1/8 inch pipe tap on the
control valve. Pressure measurements
should be taken with a water mano-
meter. (Gauges which measure in
ounces per square inch or pounds per
square inch are not accurate enough to
properly measure or set the pressure).
MANIFOLD PRESSURE
(Inches Water Column)
Natural 5.0
Propane/LP 10.0
2. The line pressure can be measured at
the 1/8 inch pipe tap in the main gas
line. Pressure measurements should
be taken with a water manometer.
LINE PRESSURE
(Inches Water Column)
Min. Max.
Natural 6.0 14.0
Propane/LP 11.0 14.0
Input rate should never exceed that shown on the
rating plate. Orifice changes must be made by a
professional gas heating equipment service per-
son.
Natural Gas models are orificed for 1000 BTU/
CU FT gas. Propane/LP Gas models are orificed
for 2500 BTU/CU FT gas. When the actual heat-
ing value differs, an orifice change may be re-
quired.
IMPORTANT
IMPORTANT
CAUTION
CAUTION
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