Rheem RTGH-95XLP-2 Use And Care Manual page 49

Water Supply Installation
NOTICE:
• Use only Teflon tape on all COLD and HOT water
connections.
• If the water flow resistance of a showerhead is too high,
the burner in the water heater will fail to ignite. Keep
all showerheads clean from debris that could cause
additional pressure drop.
• If using mixing valves on the outlet, choose one that
prevents COLD water pressure from overcoming HOT water
pressure.
• If multiple water heaters are installed in a manifold
system, the water piping MUST be in "parallel" and the
water pressure at each water heater should be 40 psi (276
kPa).
1
Install a COLD water shut-off valve near the inlet line
on the water heater. This valve will be used for servicing
and draining purposes.
NOTICE:
It is not recommended to use pipes with smaller diameters
than the water supply connection of the water heater.
2
Before attaching the water line to the water heater,
open the shut-off valve. Run the water until it has
purged all contaminants (sand, debris, air, caulking,
etc.).
3
Install a service valve on the end of the COLD water
supply line and connect it to the water inlet on the water
heater.
INSTALLATION INSTRUCTIONS
4
Open the shut-off valve in the COLD water Inlet line to
check the water flow through the water heater.
5
Close the shut-off valve and remove, clean, and
replace the water filter.
NOTICES:
• Be sure to connect the COLD water inlet and the HOT
water outlet as shown on the water heater. If reversed,
the water heater will not function.
• The flow rate of HOT water may vary when more than two
faucets (e.g. appliances, fixtures, etc.) are being used
simultaneously.
• 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.
It is recommended to use unions and flexible copper
connections at the COLD and HOT water lines. They
allow the water heater to be disconnected easily for
servicing.
Use the following guidelines when connecting the HOT
WATER OUTLET:
Connections between the water heater and point(s) of
use should be as short as possible.
Local codes shall govern the piping used for water
connections.
To conserve energy and to prevent freezing, insulate
both COLD and HOT water supply lines. DO NOT
insulate drain line or pressure-relief valve.
49