Carrier WeatherMaster 50HCQA04, Service And Maintenance Instructions, Page: 28 / 98

28
Low--Voltage Control Connections — Pull the
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.
C11554
Fig. 40 -- Accessory Electric Heater Control
Connections (HP--2, Size 06, 575V Only)
DEFROST
BOARD
ORN
BRN
Field
Connections
E-HEAT
P3-3
1 3
ORN BRN
VIO BRN BRN VIO
TB4
VIO HR2
HR1
BRN
VIO BRN
Elec Htr
HR1: On Heater 1 in Position #1
HR2: On Heater 2 in Position #2 (if installed)
C09013
Fig. 41 -- Accessory Electric Heater Control
Connections (HP--1 Except Size 12 and 121, HP--2
Except Size 12)
NOTE 4
AND 6
RED
EHR
EHR ORN
TRAN2 FROM POWER SCHEMATIC
24V BRN 24V
CB
3.2 AMPS
BRN
GRN/
YEL
24V
RED
BRN
1 0
1 0
8 6
FPT
BLK
BLK
BRN BRN
BRN
RED
ELECTRIC
HEAT(ACCESSORY)
SEE HEATER LABEL DIAGRAM
BRN
BRN
24V
5
TRAN1 FROM POWER SCHEMATIC
24V BRN 24V
GRN/
YEL
CB
3.2 AMPS
BRN OFR
VIO
TB4
3
ORN ORN
RED
C10561
Fig. 42 -- TB4 Wiring (HP Only)
NOTE:
Optional Outdoor Temperature Control
at One Heater Stage –
Move heater wire to this terminal and
connect outdoor temperature switch
between 2nd and 3rd terminals.
W2 Use
R Use
C Use
C10604
Fig. 43 -- TB4 Terminal Use (HP Only)