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UNIT
CONNECT
PRIMARY
VOLTAGE
AS
CONNECTIONS
208,
L1: RED +YEL
240
230
L2: BLU + GRA
L1: RED
Splice BLU + YEL
460
480
L2: GRA
L1: RED
575
600
L2: GRA
Fig. 31 − Powered Convenience Outlet Wiring
Maintenance — Periodically test the GFCI receptacle by
pressing the TEST button on the face of the receptacle.
This should cause the internal circuit of the receptacle to
trip and open the receptacle. Check for proper grounding
wires and power line phasing if the GFCI receptacle does
not trip as required. Press the RESET button to clear the
tripped condition.
The Fuse on the powered type — The factory fuse is a
Cooper Bussmann® Fusetron® T−15, non−renewable
screw−in (Edison base) type plug fuse.
Using unit−mounted convenience outlets — Units with
unit−mounted convenience outlet circuits will often
require two disconnects be opened to de−energize all
power to the unit. Treat all units as electrically energized
until the convenience outlet power is also checked and
de−energization is confirmed. Observe National Electrical
Code Article 210, Branch Circuits, for use of convenience
outlets.
HEAT PUMP CONTROLS
Central Terminal Board
The Central Terminal Board (CTB) is a large printed
circuit board that is located in the center of the unit
control box. This printed circuit board contains multiple
termination strips and connectors to simplify factory
control box wiring and field control connections.
Terminals are clearly marked on the board surface. See
Fig 32.
The CTB contains no software and no logic. But it does
include seven configuration jumpers that are cut to
configure the board to read external optional and
accessory controls, including that the unit is a heat pump.
X
C
G
W2
W1
Y2
CO8283
Y1
TRANSFORMER
R
TERMINALS
H1 + H3
T-STAT
H2 + H4
H1
H2 + H3
H4
H1
H2
Jumper
JMP1
JMP2
JMP3
JMP4
JMP5
JMP6
JMP7
Jumpers JMP5, JMP6 and JMP7 are located in notches
across the top of the CTB. See Fig. 32. These jumpers are
factory cut on all heat pump units. Visually check these
jumpers to confirm that they have been cut.
Compressor Protection
Over−current
The compressor has internal line−break motor protection.
24
CUT FOR
REHEAT/HP
X
C
G
W2
W1
Y2
C
Y1
U
T
F
R
O
R
OCCUPANCY
R
C
CIRCUIT 2
LPS
CIRCUIT 1
LPS
Fig. 32 − Central Terminal Board (CTB)
Table 7 – Jumper Configuration
Control Function
Phase Monitor
Occupancy Control
Smoke Detector Shutdown
Remote Shutdown
Heat Pump / Reheat
Heat Pump / Reheat
Heat Pump / Reheat
PROTECTIVE CONTROLS
CUT FOR
REHEAT/HP
CUT
FOR PMR
CUT FOR
REMOTE
SHUTDOWN
U
N
REMOTE
I
SHUTDOWN
T
S
H
U
T
D
O
W
SMOKE
SHUT-
N
DOWN
W
24V
CUT FOR
I
OUT
SMOKE
R
DETECTOR
I
I
N
G
SMOKE ALARM
HPS
HPS
C08232
Note
50TCQ default: Cut
50TCQ default: Cut
50TCQ default: Cut
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