English
Water Supply Connections Continued
If a water heater is installed in a closed water supply system, such as
one having a backflow preventer in the cold water supply line, means
shall be provided to control thermal expansion. Contact the water
supplier or local plumbing inspector on how to control this situation.
Install a shutoff valve near the inlet of the water heater for service and
draining purposes.
Before connecting the water supply pipe to the water heater, open the
shutoff valve and clean out sand, debris, air, caulking material, etc. inside the
pipe. Connect to the water inlet, then check water flow.
Close the shutoff valve and clean the water filter.
Be sure to connect the water inlet and the hot water outlet as shown on the
water heater. If reversed, the water heater will not function.
Installation of unions or flexible copper connections are recommended on
the HOT and COLD water lines, so that the water heater may disconnect
easily for servicing if necessary.
Install a Check Valve between the water heater and the water shutoff valve.
(See illustration to the top left).
In regards to the HOT WATER OUTLET:
Connections between the water heater and point(s) of use should be as short
and direct as possible.
DO NOT
use lead or non-approved plastic pipe.
NOTICE:
The flow rate of hot water may vary when more than two faucets
(appliances, fixtures, etc.) are being used simultaneously.
NOTICE:
The pipes MUST be completely drainable. If the hot water faucets are located at a point higher than the water
heater, place a drain valve at the lowest point (see illustration to the bottom left).
Gas Supply
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. Please have a professional connect the gas pipe.
A 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 clean 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)
mandates a manual gas shut-off valve:
See (NFGC) for complete instructions.
If flexible connectors are used, the
maximum length shall not exceed 36”.
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.) in tightening the pipe, particularly
if pipe-tape compound is used, as the
unit may be damaged.
The inlet gas pressure to the water
heater must not exceed 10.5 “ w.c.
for natural or 14” w.c. 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.
20H Installation
