47
INSTALLATION INSTRUCTIONS
CAUTION: This water heater
MUST ONLY be used with the following water
supply conditions to prevent product damage and
operation failure.
• Clean, potable water free of corrosive chemicals,
sand, dirt, or other contaminates.
• Inlet water temperatures above 32°F (0°C), but
not exceeding 120°F (49°C).
• DO NOT reverse the HOT and COLD water
connections.
• DO NOT connect this water heater to water lines
previously used for space heating. All water
piping and components shall be suitable for
potable water.
• With recommended water quality (see chart).
Thermal Expansion
A thermal expansion tank will be required if the
water heater is installed in a recirculation system.
This prevents damage to the heater, related piping,
and the relief valve.
NOTICE: Replacing the relief valve will
not correct the problem!
The expansion tank is designed with a built-in air
cushion that compresses as the system pressure
increases. This relieves the over-pressure condition
and eliminates the repeat operation of the relief
valve.
For other approved methods of thermal expansion,
contact an installing contractor, water supplier, or
plumbing inspector.
Water Supply Connections
CAUTION: IMPORTANT—Do
not apply heat to the HOT or COLD water
connections. If sweat connections are used, sweat
tubing to the adapter before fitting the adapter
to the water connections on the water heater.
Any heat applied to the water supply fittings will
permanently damage the internal components of
the water heater.
NOTICE: In cold environments, ice can
accumulate in the water heater’s connectors. Plug
in the water heater power cord for approximately
10 minutes before making these connections. This
will melt any ice buildup.
Plumbing should be carried out by a qualified
plumbing contractor in accordance with local
codes.
Only use approved plumbing materials.
The minimum diameter of all water pipes should
be 3/4 in. (1.9 cm).
To conserve energy and to prevent freezing,
insulate both COLD and HOT water supply lines.
Do not insulate the drain line or pressure-relief
valve.
Chart for Recommended Water Quality Levels
pH
TDS (Total
Dissolved Solids)
Free Carbon
Dioxide (CO
2
)
Total
Hardness
Aluminum Chlorides Copper Iron Manganese Zinc
6.5–8.5 Up to 500 mg/L Up to 15 mg/L
Up to
200 mg/L
Up to
0.2 mg/L
Up to
200 mg/L
Up to
1.0 mg/L
Up to
0.3 mg/L
Up to
0.05 mg/L
Up to
1.0 mg/L
Water Supply
Plumbing
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