Polaris GAS WATER HEATER Installation, Operation And Service Manual page 19

When installing gas piping, use a pipe joint compound that is resistant to
the action of propane (LPG) gases. Apply the compound to male threads
only.
CAUTION
CONTAMINANTS IN THE GAS PIPING MAY FOUL THE GAS VALVE
CAUSING A MALFUNCTION, FIRE, OR EXPLOSION. BE SURE ALL
GAS PIPING IS CLEAN AND CLEAR ON THE INSIDE BEFORE
ATTACHING THE GAS LINE.
When making pipe connections, use a back-up wrench to prevent any
twisting of the gas valve. Do not use excessive force when tightening the
pipe joint at the gas valve inlet nipple.
Refer to Figure 15 and install as follows:
Install a readily accessible full opening manual shutoff valve in the
1.
gas supply line as recommended by the local utility. Know the
location of this valve and how to turn off the gas to this unit.
Install a drip leg as shown. The drip leg must be no less than 3 inches
2.
long for the accumulation of dirt, foreign material and water droplets.
Install a ground joint union between the appliance gas valve and the
3.
manual shutoff valve. This is to allow easy removal of the gas valve.
Turn the gas supply on and check for leaks. Use a chloride-free soap
4.
and water solution (bubbles forming indicate a leak) or other
approved method. Do not use an open flame. ALL LEAKS MUST
BE REPAIRED IMMEDIATELY.
DANGER
DO NOT USE AN OPEN FLAME OR ANY KIND OF SPARK TO CHECK
GAS PIPING FOR LEAKS. IF LEAKING GAS IS PRESENT, AN
EXPLOSION OR FIRE MAY RESULT CAUSING PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH.
IMPORTANT: This water heater and its gas connections must be leak
tested before placing the appliance in operation.
IMPORTANT: Air may be present in the gas lines and could prevent the
burner from lighting on initial start-up. The gas lines should be purged of air
by a qualified service technician after installation of the gas piping system.
The gas supply pressure must not exceed the maximum supply pressure as
stated on the water heater's data plate. The minimum supply pressure is
for the purpose of input adjustment.
18
GAS SUPPLY AND PIPING (CONT.)
GAS PRESSURE TESTING
IMPORTANT: Subjecting the gas valve to pressures exceeding 14"
W.C. (1/2 psi, 3.7 kPa) may cause damage resulting in an extremely
hazardous condition.
•
If the code requires the gas lines to be tested at a pressure exceeding
14" W.C., the water heater and its manual shutoff valve must be
disconnected from the gas supply piping system and the line
capped.
•
If the gas lines are to be tested at a pressure less than 14" W.C. the
water heater must be isolated from the gas supply piping system by
closing its manual shutoff valve.
A U.L. RECOGNIZED FUEL GAS AND CO DETECTOR(S) ARE
RECOMMENDED IN ALL APPLICATIONS AND THEIR INSTALLATION
SHOULD BE IN ACCORDANCE WITH THE MANUFACTURER'S
RECOMMENDATIONS AND
REGULATIONS, OR CUSTOMS.
/OR LOCAL LAWS, RULES,