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Rheem RH-EVR Series Installation, Operation And Maintenance Manual page 3

Commercial

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RELIEF VALVE
This water heater is supplied with a temperature
and pressure relief valve(s) sized in accordance
with ASME Boiler and Pressure Vessel Code,
Section IV. The relief valve(s) is installed in the
horizontal position and mounted in the tapping
provided in the storage tank. No valve is to be
placed between the relief valve and the water
heater. To prevent water damage, the discharge
from the relief valve must be piped to a suitable
floor drain for disposal when relief occurs. No
reducing couplings or other restrictions shall be
installed in the discharge line. The discharge line
shall allow complete drainage of the valve and
line. Relief valves should be manually operated at
least once a year. A relief valve that fails to
completely reseat and continues to discharge
water must be immediately replaced with a new,
properly sized, temperature and pressure relief
valve.
Avoid contact with hot
CAUTION:
discharge water. Insure that no one is in
front of or around the relief valve discharge
line. Make sure that the extremely hot
water manually discharged from the relief
valve will not cause bodily injury or
property damage.
CAUTION:L EXPANSION OF WATER
THERMAL EXPANSION OF WATER
A relief valve that discharges periodically may be
due to thermal expansion in a closed system. A
water heater installed in a closed system, such as
one with a backflow preventer or check valve
installed in the cold water supply, shall be
provided with means to control expansion.
Contact the water supplier or local plumbing
inspector on how to correct this situation.
DO NOT plug or cap the relief valve.
ELECTRICAL CONNECTIONS
All installation procedures involving electric
power connection should only be performed by a
trained, certified electrician.
WARNING:
WATER HEATER IS EQUIPPED
FOR OPERATION ON ONE VOLTAGE
ONLY. Check the rating plate on the front of the
control panel access for the correct voltage and
phase. DO NOT use this water heater with any
other voltage other than the voltage specified on
the rating plate. Failure to use the correct voltage
can cause problems that can result in death,
serious bodily injury or property damage.
THE SUPPLY VOLTAGE OF THE
CAUTION:
WATER HEATER IS 415VAC, 3 PHASE,
60 HZ.
DO NOT CONNECT THE WATER HEATER
TO
AN
IMPROPER
ELECTRICITY!
1. Use copper conductors only. All wiring
between the appliance and field installed
devices shall be made with copper wire
suitable for at least 75° C (167° F)
temperature rating.
2. The factory internal wiring is attached to a
terminal block inside the unit. The branch
circuit is connected to the terminal block
through an opening provided on the side of the
water heater electrical access panel.
3. Line voltage wire exterior to the appliance
must be enclosed in approved conduit or
approved metal clad cable.
4. To avoid serious damage, DO NOT energize
the appliance until the system is full of
water. Ensure that all air is removed from the
storage tank and piping before beginning
initial operation. Operation of a water heater
without a completely filled tank may result in
serious damage to the appliance and heating
element burn out.
5. The water heater should be connected with a
separate grounded branch circuit with over
current protection and disconnect switch. The
water
heater
should
accordance with national and local codes. A
ground terminal is provided for ground
connection only.
SOURCE
OF
be
grounded
in
Page: 3 / 8

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