Air Handler Installation Manual

Page 20mrcool.com
Unit Installation
Electrical Connection
Connecting the Power Cord & Thermostat Wire
AP1
Power
G
L1
L2
Fan
motor
1
XT3
TC
RD
BK
BU
YE
WH
1
X1
2
3
4 5
6
G
M
XT1- L1
XT1- L2
Note:
1.Please refer to the instruction manual to check whether the unit can connect to the engineering electric heating.
2.When the unit doesn’t connect to the engineering electric heating, connect the engineering power supply to the L1 and L2 of wiring board.
3.When the unit connects to the engineering electric heating, connect the engineering power supply to the breaker.
4.The primary input voltage of transformer is defaulted at 230V. When switch
ing the power supply of the complete unit to 208V, connect the primary input voltage of
transformer to 208V, which can be realized by exchanging the
5.① Only for the unit whose motor is with earthing wire.
YEGN
W1
W2
BK
RD
AP2
G
CN1
COM2
W7 W8
W9
W10
W11
W5
W4
W12
W13
X1 X2
X10
X4
X3
X9 X13 X7
L1
L2
XT1
L1
L1
L1
L2
L2
L2
Y
B
W1
R
C
G
Y
XT2
C
Y
G G
Y
C
B B B
W1 W1 W1
R RR
C
①
DC_MOTOR1
4
4
X1
G
CB1 CB2
CB2
CB1
L1
L2
G
15KW HEAT KI T
HEAT
Code Name
CB1/CB2
Circuit
Breaker
TC Transformer
XT1~XT3 Wiring board
W6
Indoor Unit
Thermostat
WARNING
1. Before work begins, please check to ensure the unit and thermostat are powered OFF.
2. Match the terminal numbers and wire colors with the colors indicated in the indoor unit.
3. Wrong wire connection may burn the electrical components.
4. Connect the wires firmly to the wiring box. Incomplete installation may lead to a fire hazard.
5. Please use wire clamps to secure the external covers of connecting wires. (Insulators must be
clamped securely; otherwise, electric leakage may occur.)
6. Ground wire should be connected.
black wire and the blue wire.