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G. Cleanup and joint movement
Remove all excess cement from around the pipe and fitting with a
dry cotton rag. This must be done while the cement is still soft.
The joint should not be disturbed immediately after the cementing
procedure, and sufficient time should be allowed for proper curing
of the joint. Exact drying time is difficult to predict because it depends
on variables such as temperature, humidity and cement integrity. For
more specific information, you should contact your solvent cement
manufacturer.
GAS CONNECTIONS
The minimum gas supply pressure for input adjustment is 5.0" W.C. for
natural gas (11.0" W.C. for propane).
THE HEATER IS NOT INTENDED FOR OPERATION AT HIGHER THAN 14"
WATER COLUMN SUPPLY PRESSURE. EXPOSURE TO HIGHER GAS
SUPPLY PRESSURE MAY CAUSE DAMAGE TO THE CONTROL WHICH
COULD RESULT IN FIRE OR EXPLOSION. If overpressure has occurred
such as through improper testing of gas lines or emergency malfunction
of the supply system, the control must be checked for safe operation.
Make sure that the outside vents on the supply regulators and the safety
vent valves are protected against blockage. These are parts of the gas
supply system not the heater. Vent blockage may occur during ice
storms.
IT IS IMPORTANT TO GUARD AGAINST CONTROL FOULING FROM
CONTAMINANTS IN THE GAS WAYS. SUCH FOULING MAY CAUSE
IMPROPER OPERATION, FIRE OR EXPLOSION.
All piping must comply with local codes and ordinances or with the
National Fuel Gas Code (ANSI Z223.1 NFPA-54) whichever applies.
REFER TO FIG. 12 FOR CONNECTION DETAILS. BEFORE ATTACHING
THE GAS LINE BE SURE THAT ALL GAS PIPE IS CLEAN ON THE INSIDE.
TO TRAP ANY DIRT OR FOREIGN MATERIAL IN THE GAS SUPPLY LINE,
A DIRT LEG (SOMETIMES CALLED DRIP LEG) MUST BE INCORPORATED
IN THE PIPING, FIG. 12.
The dirt leg must be readily accessible. Install in
accordance with recommendations of serving gas supplier. Refer to
the latest edition of ANSI Z223.1.
To prevent damage, care must be taken not to apply too much torque
when attaching gas supply pipe to thermostat gas inlet. The thermostat
inlet has a pad for use with a backup wrench.
Apply joint compounds (pipe dope) sparingly and only to the male threads
of pipe joints. Do not apply compound to the first two threads. Use
compounds resistant to the action of liquefied petroleum gases. Do not
use teflon tape on thermostat fittings.
STEP G
CONNECTION OF GAS PIPE
1. When connecting gas pipe to unit, apply wrench to flange only. Note:
Do not use wrench on gas valve or gas valve bracket.
2. PERFORM THE GAS LEAK TEST ANY TIME WORK IS DONE ON A
GAS SYSTEM TO AVOID THE POSSIBILITY OF FIRE OR EXPLOSION
WITH PROPERTY DAMAGE PERSONAL INJURY OR LOSS OF LIFE.
The Gas Leak Test is performed as follows: Paint pipe connections
upstream of gas control with a rich soap and water solution to test
for leaks before operating main burner. Bubbles indicate gas leak.
To stop leak, tighten pipe connections. After piping connections are
checked, see OPERATION section below. Once heater is operating
and main burner is on: paint pipe joints (including flanges), pilot gas
tubing connections and control inlet and outlet with rich soap and
water solution. Bubbles indicate gas leak. To stop leak, tighten flange
screws, joints and pipe connections. Replace part if leak can't be
stopped.
DISCONNECT THE APPLIANCE AND ITS INDIVIDUAL SHUT OFF VALVE
FROM THE GAS SUPPLY PIPING SYSTEM DURING ANY SUPPLY
PRESSURE TESTING EXCEEDING 1/2 PSI (3.5 kPa). GAS SUPPLY LINE
MUST BE CAPPED WHEN DISCONNECTED FROM THE HEATER. FOR
TEST PRESSURES AT 1/2 PSI (3.5 kPa) OR LESS, THE APPLIANCE NEED
NOT BE DISCONNECTED, BUT MUST BE ISOLATED FROM THE SUPPLY
PRESSURE TEST BY CLOSING THE MAIN MANUAL GAS VALVE.
BEFORE PLACING THE HEATER IN OPERATION, CHECK FOR GAS
LEAKAGE. USE SOAP AND WATER SOLUTION OR OTHER MATERIAL
ACCEPTABLE FOR THIS PURPOSE. DO NOT USE MATCHES CANDLES,
FLAME OR OTHER SOURCES OF IGNITION TO LOCATE GAS LEAKS.
OPERATION
DO NOT ATTEMPT TO OPERATE WATER HEATER WITH COLD WATER
INLET VALVE CLOSED.
NEVER OPERATE THE HEATER WITHOUT FIRST BEING CERTAIN IT IS
FILLED WITH WATER AND A TEMPERATURE AND PRESSURE RELIEF
VALVE IS INSTALLED IN THE RELIEF VALVE OPENING OF THE HEATER.
TO OPERATE THE HEATER
1. Close the heater drain valve (Figure 1-T) by turning handle clockwise
.
2. Open a nearby hot water faucet to permit the air in the system to
escape.
3. Fully open the cold water inlet pipe valve (Figure 1-M) allowing the
heater and piping to be filled.
4. Close the hot water faucet as water starts to flow.
5. The heater is ready to be operated.
12
WARNING
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