Owners Manual

20 49-5000255
ENGLISH
ELECTRICAL WIRING
Wiring Diagram
NOTES:
1. The wiring diagram shown above is for reference
purposes only. The number of connection kits and
indoor units shall be subject to the field installation.
2. Two conductor non-polar communication line with
shield shall be adopted for communication lines between
the connection kit and the indoor/outdoor unit. The wire
size for indoor unit and connection kit is 16ga twisted-
shielded.
3. All connection kits within one system may share one
circuit breaker for power supply. Wire size should be
increased per the NEC for longer distances.
4. Power connections to the connection kit power
terminals should be an eyelet type. (Refer to the
following figure).
1. Multiple wire connections using one connector
should contain the same size wire.
2. Refer to the following figure for crimping wires with
the same diameter.
5. Tighten terminal screws with proper size screw driver.
6. Over-tightening terminal scres will cause damage. Refer
to the following table for tightening torques of terminal
screws.
7. Connecting line voltage to communication terminals will
damage the circuit board.
8. Communication wiring shall conform to the following
specifications:
1. The maximum wiring length between the outdoor
machine and the valve cage, the valve cage and the
indoor machine, and between valve cages is 3280
feet at most.
2. The maximum wiring length between the valve cage
and the wire controller for switching working modes
is 1640 feet maximum.
Wiring Connection
Refer to the following figure – Diagram of electrical wiring of a connection kit – for wiring connection of connection kit.
1. Communication connections
Remove the cover of the electrical cabinet of
the valve cage. Introduce communication lines
for outdoor and indoor units through the holes
at the lower right of the electrical cabinet and
crimp them on the communication terminal block
respectively. Then fix the lead wires with crimping
pliers to prevent the communication line from
falling off under the effect of external force.
2. Connection of power line and ground wire
Remove the cover of the electrical cabinet of the
connection kit. Introduce power lines through the
openings at the lower left of the electrical cabinet and
crimp them on the power terminal block. Then fix the
power lines with crimping pliers to prevent them from
falling off under the effect of external force.
1) Don’t route communication lines and
power lines together. Otherwise, it may
cause malfunction or fault due to electrical
disturbance.
2) Make sure that ground wires are properly
crimped. Otherwise, grounding may be
ineffective.
Wire
Insulating sleeve
Round. Press the terminal
Connect wires with the
same diameter on both
sides
It’s forbidden to connect
two wires on one side
Wires with different
diameters are not allowed
Dimension of terminal screw Tightening torque (in/lbs)
M3.5 (terminal block for communication line) 7.08 ~ 8.5
M4 (terminal block for power line) 10.44 ~ 12.75
M4 (terminal block for ground wire) 13.45 ~ 16.46