Carrier 50HCQA05 Service And Maintenance Instructions page 28

Low- - Voltage Control
low- - voltage control leads from the heater module(s). The
50HCQ units use a various number of control wires,
colors and terminal boards depending on voltage and unit
size. See Fig. 40 through Fig. 43 and the unit wiring
diagram for proper placement.
Fig. 40 - - Accessory Electric Heater Control
Connections (HP- - 2, Size 06, 575V Only)
DEFROST
BOARD
E-HEAT ORN
P3-3
BRN
ORN
1
TB4
VIO
Field
Connections
HR1: On Heater 1 in Position #1
HR2: On Heater 2 in Position #2 (if installed)
Fig. 41 - - Accessory Electric Heater Control
Connections (HP- - 1 Except Size 12 and 121, HP- - 2
Except Size 12)
Connections — Pull
C11554
BRN
3
VIO BRN BRN
Elec Htr
VIO HR2 BRN
VIO HR1 BRN
C09013
the
TRAN1 FROM POWER SCHEMATIC
CB
24V 24V
GRN/
3.2 AMPS
YEL
RED
FPT
BLK
BLK
BRN
Fig. 42 - - TB4 Wiring (HP Only)
R Use
Fig. 43 - - TB4 Terminal Use (HP Only)
28
BRN
TRAN2 FROM POWER SCHEMATIC
CB
RED 24V 24V
GRN/
3.2 AMPS
YEL
RED
ORN
VIO
EHR
8 6 ORN
ORN
NOTE 4
AND 6
RED
TB4
ELECTRIC
BRN
HEAT(ACCESSORY)
SEE HEATER LABEL DIAGRAM
NOTE:
Optional Outdoor Temperature Control
at One Heater Stage –
W2 Use
Move heater wire to this terminal and
connect outdoor temperature switch
between 2nd and 3rd terminals.
C Use
BRN 5
BRN
1 EHR 0 BRN 3
1 OFR 0 BRN
24V
BRN
BRN 24V
BRN
C10561
C10604