Rheem CRTGH-95X Series - Water Supply

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).
• D O NOT reverse the HOT and COLD water connections.
• D O 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.
To allow the full flow capacity, it is recommended
to keep water inlet and outlet pipes 3/4" (1.9 cm)
diameter or larger.
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