Air Source Heat Pump Water Heater
21
9 Wiring
9.1 Wire Layout
(1)
This air source water heater is class I appliance. Ensure that wire
layout is performed by professional personnel according to national wiring rules.
(2)
Ensure that a switch for all-pole disconnection is available for the
fixed lines and is directly connected to wiring terminals of the power supply.
Ensure that contactor opening distance on all poles meets the disconnection
requirements under overvoltage category III conditions.
(3)
Ensure that reliable grounding measures are taken. A dedicated
grounding apparatus should be used.
(4)
Use the power supply with specifications provided in the nameplate,
and use circuits dedicated for air conditioners.
(5)
Copper-conductor cables must be adopted for power cables, and the
operating temperature should not greater than the stipulated value. The
diameter of the cables should be large enough. For details, refer to Table 9-1. If
the length of the power cable is greater than 15 meters, choose a power
cable with a larger cross-sectional area to prevent problems caused
overloading. Do not pull the power cable during the installation.
(6)
Use independent fixed socket for the supply. The structure of the
socket must match the power plug of the water heater and be in line with
relevant national standards. The socket should be placed in the safe position
that is out of the reach of water and does not cause electric shock hazards. It
must not be placed in the bathroom, kitchen, balcony, and other wet places.
(7)
Do not use the socket converter, extension cords, or wiring boards to
adapt to the size of the plug of the water heater, and do not use another plug to
for the socket. The water heater should use independent wires, and do not
share a line with other appliances.
(8)
If the installation conditions on site change, consider using
cables whose reduced capacity can still meet site requirements, based on the
specifications of the power cables and air circuit breakers provided by the
vendor.
(9)
If the power flexible wire is damaged, it must be replaced by
professional personnel of the vendor, maintenance center of the vendor, or
