20
if the GFCI receptacle does not trip as required. Press the
RESET button to clear the tripped condition.
CO8283
UNIT
VOLTAGE
CONNECT
AS
PRIMARY
CONNECTIONS
TRANSFORMER
TERMINALS
208,
230
240
L1: RED +YEL
L2: BLU + GRA
H1 + H3
H2 + H4
460
480
L1: RED
Splice BLU + YEL
L2: GRA
H1
H2 + H3
H4
575
600
L1: RED
L2: GRA
H1
H2
Fig. 24 -- 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.
Fuse on powered type: The factory fuse is a Bussman
“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 that 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
Controls Terminal Board
The Controls 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 25.
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.
C09274
Fig. 25 -- Controls Terminal Board (CTB)
Table 7 – Jumper Configuration
Jumper
Control Function
Note
JMP1
Phase Monitor
JMP2
Occupancy Control
JMP3
Smoke Detector Shutdown
JMP4
Remote Shutdown
JMP5
Heat Pump / Reheat
548J default: Cut
JMP6
Heat Pump / Reheat
548J default: Cut
JMP7
Heat Pump / Reheat
548J default: Cut
Jumpers JMP5, JMP6 and JMP7 are located in notches
across the top of the CTB (see Fig. 25 ). These jumpers
are factory cut on all heat pump units. Visually check
these jumpers to confirm that they have been cut.
PROTECTIVE CONTROLS
Compressor Protection
Overcurrent
The compressor has internal linebreak motor protection.
548J
