Connections Electrical - Rheem HPHD-135HNU-483 Owner's Manual And Installation Instructions

Commercial Air to Water Heat Pump Water Heater
CONNECTIONS - ELECTRICAL
The power supply to the water heater must not be switched
on until the water heater is filled with water and a satisfac-
tory megger reading is obtained.
MEGGER READING
When a megger test is conducted on this water heater,
then the following should be noted.
WARNING: This water heater contains elec-
tronic equipment and 500 V insulation tests
must only be conducted between actives
and earth and between neutral and earth. An
active to neutral test WILL damage the elec-
tronics.
An insulation test result of above 1 MΩ should be ob-
tained for this water heater.
ELECTRICAL CONNECTION
All electrical work and permanent wiring must be car-
ried out by a qualified person and in accordance with
UL 1995.
HEAT PUMP
The heat pump water heater must be directly connected
to the proper mains power supply (HPHD-60 at 208-240V
single phase, HPHD135 at 480V 3 phase). The heat pump
must be on its own circuit with an circuit breaker installed
at the switchboard. A secondary isolating switch must be
installed within reach of the water heater.
34
A conduit is required for the electrical cable to the heat
pump water heater. The conduit is to be connected to the
unit with a 20mm terminator. Holes are provided on the
electrical panel for cabling. Connect the power supply and
earth wires directly to the terminal block, ensuring there
are no excess wire loops inside the electrical enclosure.
Correct phase connection is required.
PRIMARY PUMP
The power to the primary pump for each heat pump is
supplied from the water heater. Connect the active, neu-
tral and earth wire to the pump terminals as shown in the
photo inside the pump cover and to the terminals located
within the heat pump electrical enclosure.
Photo inside the pump cover.
A 20 mm conduit is required for the electrical cable be-
tween the water heater and pump. The conduit is to be
connected to the water heater with a 20 mm terminator.
Holes are provided on the electrical panel for cabling.
HPHD-60
HPHD135
ELECTRICAL DATA TABLE
Model 60k Btu
Electrical Connection 208-240V single phase
MCA
Minimum Circuit Size
(per phase)
HPHD135
Primary Pump
135k Btu
480V (3 phase)
40 A 35A
60A 50A
HPHD-60
Primary Pump