Paloma PH-28c Indoor and Outdoor - Manual (Page 12)

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WARNING: Do not attempt to convert this water heater for use with a different type of gas other than the type
shown on the rating plate. Such conversion could result in hazardous operating conditions.
Leak Testing
The water heater and its gas connections
must be leak tested at normal operating
pressures before it is placed in operation.
Turn on the gas shut-off valve(s) to
the water heater.
Use a soapy water solution to test for
leaks at all connections and fittings.
Bubbles indicate a gas leak that must
be corrected.
The factory connections should also be
leak tested after the water heater is placed
in operation.
High Altitude
I n p u t r a t i n g o f t h i s w a t e r h e a t e r i s
b a s e d o n s e a l e v e l o p e r a t i o n . A t
h i g h e r e l e v a t i o n s t h e a c t u a l i n p u t
r a t e m a y b e l o w e r t h a n t h e v a l u e l i s t -
e d o n t h e r a t i n g l a b e l . T h i s w a t e r
h e a t e r c a n b e i n s t a l l e d a t e l e v a t i o n s
u p t o 3 , 2 8 0 f e e t ( 1 0 0 0 m ) w i t h o u t a n y
c h an g e o r a d j u s t m e n t .
NOTICE: For installations above
3,280 feet ( 1 0 0 0 m ) elevation, the
connector on the PC board must be
replaced. Do not install this water
heater at elevations above 3,280 feet
(1000 m) without installing the proper
high altitude connector. Please contact
your local distributor, dealer, or
Paloma for replacement connector.
Pressure Testing the Gas Supply System
The water heater and its manual gas shut-
off valve must be disconnected from the
gas supply piping system during any
pressure testing of the system at
pressures in excess of 1/2 psi (14” w.c.)
(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” w.c.) (3.5 kPa).
Gas Supply
The supplied Manual Gas Appliance
Shutoff Valve must be installed at the gas
connection of the water heater at the time
of installation (see diagram to the left).
The branch gas supply line to the water
heater should be a minimum of 3/4” black
steel pipe or other approved gas piping
material.
A ground joint union or ANSI design
certified semi-rigid or flexible gas
appliance connector should be installed in
the gas line close to the water heater. The
National Fuel Gas Code (NFGC) ANSI
Z223.1 and CAN B149 code mandates a
manual gas shut-off valve: See NFGC &
B149 for complete instructions.
If flexible connectors are used, the
maximum length shall not exceed
36” (91 cm).
If lever type gas shut offs are used, they
shall be T-Handle type.
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.
A sediment trap should be installed at the
bottom of the gas line.
Do not use excessive force
(over 31.5 ft lbs.) (42.7 Nm) in tightening
the pipe, particularly if teflon pipe
compound is used, as the unit may be
damaged.
The inlet gas pressure to the water heater
must not exceed 10.5” w.c. (2.6 kPa) for
natural or 14” w.c. (3.5 kPa) for LP gas.
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 pressures
are present, contact your gas supplier for
correction.
NOTICE: To ensure proper operation
of the heater the gas pipe and gas
meter must be sized correctly.
Gas piping shall be in accordance
with local, utility company require-
ment and/or in the absence of local
codes, use the latest edition of the
National Fuel Gas Code. In Canada
the latest edition of CSA B149.1 Nat-
ural Gas and Propane installation
code.
WARNING: Never use
an open flame to test for
gas leaks, as property
damage, personal injury, or
death could result.
Manual Gas
Appliance
Shut-off
(Supplied)
Sediment
Trap
Manual
Gas
Supply
Line
Shut-off
Valve
Union
Cap
WARNING: Install a
gas pressure regulator, in
the gas supply line, which
does not exceed the
maximum supply pressure.
DO NOT use an industrial
type gas regulator.