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Fig. 28 —
Powered Convenience Outlet Wiring
Duty Cycle
The unit-powered convenience outlet has a duty cycle limitation.
The transformer is intended to provide power on an intermittent
basis for service tools, lamps, etc; it is not intended to provide
15 amps loading for continuous duty loads (such as electric heat
-
ers for overnight use). Observe a 50% limit on circuit loading
above 8 amps (i.e., limit loads exceeding 8 amps to 30 minutes of
operation every hour).
Test the GFCI receptacle by pressing the TEST button on the face
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.
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 Power Type
The factory fuse is a Cooper Bussmann
1
Fusetron T-15, non-re
-
newable screw-in (Edison base) type plug fuse.
Using Unit-mounted Convenience Outlets
Units with unit-mounted convenience outlet circuits will often re
-
quire that two disconnects be opened to de-energize all power to
the unit. Treat all units as electrically energized until the conve
-
nience outlet power is also checked and de-energization is con
-
firmed. Observe National Electrical Code Article 210, Branch Cir
-
cuits, 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 cir
-
cuit 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 29.
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 the unit is
a heat pump. Jumpers JMP5, JMP6 and JMP7 are located in
notches across the top of the CTB. See Fig. 29. These jumpers are
factory cut on all heat pump units (see Table 6). Visually check
these jumpers to confirm that they have been cut.
Fig. 29 —
Central Terminal Board (CTB)
1. Bussmann and Fusetron are trademarks of Cooper Technologies
Company.
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
Table 6 —
Jumper Configuration
JUMPER
CONTROL FUNCTION
NOTE
JMP1
Phase Monitor
JMP2
Occupancy Control
JMP3
Smoke Detector Shutdown
JMP4
Remote Shutdown
JMP5
Heat Pump / Reheat
50TCQ default: Cut
JMP6
Heat Pump / Reheat
50TCQ default: Cut
JMP7
Heat Pump / Reheat
50TCQ default: Cut
Summary of Contents for WeatherMaker 50TCQ 17-24 Series
Page 35: ...35 Fig 53 RTU Open Overlay for Economizer Wiring ...
Page 36: ...36 Fig 54 VFD Overlay for W2770 Controller Wiring ...
Page 68: ...68 Fig B 50TCQD17 24 Control Wiring Diagram APPENDIX D WIRING DIAGRAMS ...
Page 69: ...69 Fig C 50TCQD17 24 Power Wiring Diagram 208 230 3 60 Units APPENDIX D WIRING DIAGRAMS ...
Page 70: ...70 Fig D 50TCQD17 24 Power Wiring Diagram 460 3 60 575 3 60 Units APPENDIX D WIRING DIAGRAMS ...
Page 71: ...71 Fig E RTU Open Overlay APPENDIX D WIRING DIAGRAMS ...
Page 72: ...72 Fig F PremierLink Overlay APPENDIX D WIRING DIAGRAMS ...