Installation Of Plumbing - Rinnai REU-VA1320WF-US Operation And Installation Manual

Installation of Plumbing

Temperature-Pressure Relief Valve
Requirements
Install the Temperature-Pressure Relief (T&P) Valve
according to these instructions.
This water heater is provided with a combination
temperature-pressure relief valve. For safe operation
of the water heater, the relief valve(s) must not be
removed from its designated point of installation or
plugged.
An approved Temperature-Pressure Relief Valve is
required by the American National Standard (ANSI
Z21.10.3) for all water heating systems, and shall be
accessible for servicing.
DO NOT

Do not plug the T&P valve and do not install any
reducing fittings or other restrictions in the relief
line. The relief line should allow for complete
drainage of the T&P valve and the line.

Do not place any other type valve or shut off
device between the relief valve and the water
heater.
MUST DO

The T&P valve must comply with the standard for
Relief Valves and Automatic Gas Shutoff Devices for
Hot Water Supply Systems ANSI Z21.22 and /or the
standard Temperature, Pressure, Temperature and
Pressure Relief Valves and Vacuum Relief Valves,
CAN1-4.4.

The T&P valve must be rated up to 150 psi and to
at least the maximum BTU/hr of the appliance.

The discharge from the T&P Valve should be piped
to the ground or into a drain system to prevent
exposure or possible burn hazards to humans or
other plant or animal life. Follow local codes.
Water discharged from the relief valve could cause
severe burns instantly, scalds, or death.

The Temperature-Pressure Relief Valve must be
manually operated once a year to check for correct
operation.
INFORMATION

If a T&P discharges periodically, this may be due to
thermal expansion in a closed water supply
system. Contact the water supplier or local
plumbing inspector on how to correct this
situation. Do not plug the relief valve.
Piping Requirements
A manual valve must be placed in the water inlet
connection to the water heater before it is connected
to the water line. Unions may be used on both the
hot and cold water lines for future servicing and
disconnection of the unit.
DO NOT

Do not introduce toxic chemicals such as those
used for boiler water treatment to the potable
water used for space heating.
MUST DO

The piping (including soldering materials) and
components connected to this appliance must be
approved for use in potable water systems.

Purge the water line to remove all debris and air.
Debris will damage the water heater.

If the appliance will be used as a potable water
source, it must not be connected to a system that
was previously used with a nonpotable water
heating appliance.

Ensure that the water filter on the water heater is
clean and installed.
RH180 Manual 21