Table of Contents
Advertisement
A steady flow of water from the hot water faucet(s)
indicates a full water heater.
GAS SUPPLY
The inlet gas pressure to the water heater must not
exceed 10.5" wc (2.6 kPa) for Natural gas and 13.0" wc
(3.2 kPa) for L.P. gas. The minimum inlet gas pressure
(with main burner on) is shown on the rating plate.
Check to see if high or low gas pressure is present and
then contact the gas company for correction.
The branch gas supply line to the water heater should
be clean properly sized steel pipe or other approved gas
piping material.
A union or ANSI design certified semirigid or flexible
gas appliance connector should be installed in the gas
line close to the water heater. The National Fuel Gas
Code (NFGC) mandates a manual gas shut off valve: See
(NFCG) for complete instructions.
If flexible connectors are used, the maximum length
shall not exceed 36 in. and must meet the requirements
in ANSI Z21.24/CSA 6.10 - Connectors for Gas
Appliances.
Compound used on the threaded joints of the gas piping
must be of the type resistant to the action of LP gas. Use
compound sparingly on male threads only.
Where a sediment trap is not incorporated as part
of the appliance, a sediment trap shall be installed
downstream of the equipment shutoff valve as close to
the inlet of the appliance as practical at the time of the
appliance installation. The sediment trap shall be either
a tee fitting with a capped nipple in the bottom outlet or
other device recognized as an effective sediment trap.
See figure.
DO NOT use excessive force (20Ft.-Lbs.) in tightening
the pipe joint at the gas control (thermostat) inlet,
particularly if teflon pipe compound is used, as the valve
body may be damaged.
For purposes of input adjustment, the minimum inlet
gas pressure (with main burner on) is shown on the
water heater rating plate. If high or low gas pressure are
present, contact your gas supplier for correction.
A ground joint union and manual shutoff valve should be
installed in the gas line near the water heater so that the
burner assembly may be easily removed. The shut-off
valve must be readily accessible for turning on or off.
LEAK TESTING
The water heater and its gas connections MUST be leak
tested at normal operating pressure before it is placed
in operation. Turn ON the manual gas shut-off valve
near the water heater. Use a soapy water solution to test
for gas leaks at all connections and fittings. Bubbles
indicate a gas leak that must be corrected. The water
heater factory connections to the gas valve should
To Gas Supply
Manual Gas Shut Off
Sediment
Trap
also be leak tested after placing the water heater in
operation.
WARNING:
!
NEVER use open flame to test for gas leaks, as bodily
injury or property damage could result.
PRESSURE TESTING THE GAS SUPPLY SYSTEM
The water heater and its individual gas shut-off valve
MUST be disconnected from the gas supply piping
system during any high pressure testing of that system
at pressures in excess of 1/2 psi (14" WC. 3.5 kPa).
The water heater MUST be isolated from the gas piping
system by closing the manual gas shut-off valve during
any pressure testing of the gas supply piping at pressures
equal to or less than 1/2 psi (14" WC / 3.5 kPa).
CONDENSATE
The exhaust elbow/condensate trap is shipped pre-installed
with the heater. Pour the supplied neutralizer into the
exhaust tee before vent pipe installation. Make sure that the
neutralizer is at the bottom as shown in the figure on next
page.
This is a condensing high efficiency appliance and has a
condensate removal system. The exhaust tee incorporates
a condensate trap and must be filled with water before
operating the water heater. Pour about 1 cup of water into
the exhaust tee.
This water heater generates condensate and requires a
drain to be located in close proximity to allow condensate to
drain safely. The drain line and fittings should be installed
per installation instructions.
Be sure the condensate runs freely to the drain and does
not accumulate in the condensate trap or the condensate
line. In cold climates, precautions may need to be taken
to ensure that the condensate drain lines DO not freeze. A
water proof heat tape may be used to prevent freezing of
condensate lines.
INSTALLATION
Union
Gas Pipe to Gas Valve
9
Advertisement
Table of Contents
