Sediment Traps - Giant UG40 Installation And Operating Manual

Make sure the gas supplied is the same type listed on the
model rating plate. The inlet gas pressure must not exceed
14" w.c. for natural gas and propane gas. The minimum
inlet gas pressure shown on the rating plate is that which
will permit firing at rated input.
All gas piping must comply with local codes and ordinances
or with the "Natural Gas and Propane Installation Code"
B149.1 . Copper or brass tubing and fittings (except tin
lined copper tubing) should not be used.
If the gas control valve/thermostat is subjected to
pressures exceeding 1/2 psi, the damage to the gas
control valve/thermostat could result in a fire or explosion
from leaking gas.
If the main gas line shut-off serving all gas appliances is
used, also turn "OFF" the gas at each appliance. Leave
all gas appliances shut "OFF" until the water heater
installation is complete.
A gas line of sufficient size must be run to the water
heater. Consult the current edition of "Natural Gas and
Propane Installation Code" B149.1 and your gas supplier
concerning pipe size.
There must be:
•
A readily accessible manual shut-off valve in the gas
supply line serving the water heater, and
•
A sediment trap ahead of gas control valve/thermostat
to help prevent dirt and foreign materials from entering
the gas control valve/thermostat.
•
A ground joint union or other means to disconnect
between the shut-off valve and gas control valve/
thermostat to permit servicing of the unit.
Be sure to check all the gas piping for leaks before lighting
the water heater. Use a soapy water solution, not a match
or open flame. Repair and retest as required. When
finished, rinse off soapy solution and wipe dry.
WARNING
• Use joint compound or tape
compatible with natural gas
and propane.
• Leak test before operating
heater.
• Disconnect gas piping and
shut-off valve before pressure
testing system.
Use pipe joint compound or Teflon
resistant to the action of gases.
The appliance and its gas connection must be leak tested
before placing the appliance in operation.
The appliance and its individual shut-off valve should be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
Fire and Explosion Hazard
tape marked as being
®
excess of 1/2 psi. It should be isolated from the gas supply
piping system by closing its individual manual shut-off
valve during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 psi.
Connecting gas piping to the gas control valve/thermostat
of water heater can be accomplished by the method shown
in Figure 15.
76mm (3")
MIN.

SEDIMENT TRAPS

WARNING
A sediment trap should be installed as close to the inlet of
the water heater as practical at the time of water heater
installation. The sediment trap should be either a tee fitting
with a capped nipple in the bottom outlet or other device
recognized as an effective sediment trap. If a tee fitting is
used, it should be installed in conformance with the method
of installation shown in
Contaminants in the gas lines may cause improper
operation of the gas control valve/thermostat that may
result in fire or explosion. 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 sediment
trap must be incorporated in the piping.
19
BLACK PIPE
VACATION
WARM
COOLER
SEDIMENT
TRAP
GROUND
CONTROL
JOINT
VALVE
UNION
(OPTIONAL)
Figure 15.
Fire and Explosion Hazard
• Contaminants in gas lines can
cause fire or explosion.
• Clean all gas piping before
installation.
• Install sediment trap in accor-
dance with B149.1.
Figure 15.
A B C
VERY
HOT
HOTTER
GAS