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Electric auxiliary heating wiring diagram
3KW/5KW HEAT KIT
:thermal cut-out
:thermal link, self-resetting
Aux-Heat
control signal
TO INDOOR UNIT
MAINBOARD
cn12
24V
NOTE1:
This symbol indicates the element is
optional, The wiring type of the actual
unit shall prevail.
NOTE2:
Please attach the nameplate to the cover of
the electric control box. All the round holes
located on the plate represent numbers. Please
refer to the Installation Manual for details.
Round hole number Relay number
RELAY 1
RED
RELAY1
BLACK
TO INDOOR UNIT
MAINBOARD
cn11
3
1(L1) 2(L2)
3(S)
POWER A
Round hole number
Circuit breaker number
CB1
BLACK
(green)
Y/G
L1
L2
Y/G
POWER B
NOTE3: TO BE WIRED IN ACCORDANCE WITH NEC
AND LOCAL CODES.
NOTE4: POWER A,B,C,D ARE DIFFERENT POWERS.
The wiring mode of power supply A shall be
based on the type of original wiring terminal of
AHU; for type A, S position must be connected
to the ourdoor S; for type B, S position shall not
be connected.
1(L1) 2(L2)
3(S)
Y/G
TYPE A
HTR1
Y/G
L1
L2
TYPE B
Page 25
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