24
C09276
Fig. 33 -- Defrost Control Board Location
Table 8 – 50HCQ Defrost Board I/O and Jumper Configurations
Inputs
Point Name
Type of I/O
Connection Pin Number
Unit Connection
Note
G Fan
DI, 24Vac
P2---3
LCTB---G
Y1 Cool 1
DI, 24Vac
P2---5
LCTB---Y1
Y2 Cool 2
DI, 24Vac
P2---4
LCTB---Y2
W1 Heat 1
DI, 24Vac
P2---7
LCTB---W1
W2 Heat 2
DI, 24Vac
P2---6
LCTB---W2
R Power
24Vac
P3---1
CONTL BRD---8
C Common
24Vac
P3---2
CONTL BRD---4
DFT1
DI, 24Vac
DFT---1 to DFT---1
DFT 2
DI, 24Vac
DFT---2 to DFT---2
Outputs
Point Name
Type of I/O
Connection Pin Number
Unit Connection
Note
IFO Fan On
DO, 24Vac
P3---9
REHEAT---2
OF OD Fan On
DO, 24Vac
OF
OFR
RVS1
DO, 24Vac
P3---7 to P3---5
Energize in COOL
RVS2
DO, 24Vac
P3---6 to P3---4
Energize in COOL
COMP 1
DO, 24Vac
P3---10
FPT --- REHEAT---6
COMP 2
DO, 24Vac
P3---8
REHEAT---8
HEAT 2
DO, 24Vac
E---HEAT
HC---1 (TB4---1)
COM
24Vac
P3---3
HC---1 (TB4---3)
Configuration
Point Name
Type of I/O
Connection Pin Number
Unit Connection
Note
Select Jumper
24Vac
P1---1
2 Compressor
24Vac
P1---3
Use for 50HCQD
Speed--Up Configuration
Point Name
Type of I/O
Connection Pin Number
Unit Connection
Note
Speed---Up Jumper
JMP17
Speed---Up Jumper
JMP18
Jumper for 1--3 seconds: Factory Test, defrost runs for 9 seconds
Jumper for 5--20 seconds: Forced Defrost, defrost runs for 30 seconds if DFT2 is open
Reversing valve control —
The DFB has two outputs for
unit reversing valve control. Operation of the reversing
valves is based on internal logic; this application does not
use an “O” or “B” signal to determine reversing valve
position. Reversing valves are energized during the
cooling stages and the defrost cycle and de--energized
during heating cycles. Once energized at the start of a
cooling stage, the reversing valve will remain energized
until the next heating cycle demand is received. Once
de--energized at the start of a Heating cycle, the reversing
valves will remain de--energized until the next cooling
stage is initiated.
Compressor control —
The DFB receives inputs
indicating Stage 1 Cooling, Stage 2 Cooling (sizes 08 --
12) and Stage 1 Heating from the space thermostat or unit
control system (PremierLink
or RTU--OPEN); it
generates commands to start compressors with or without
reversing valve operation to produce Stage 1 Cooling (one
compressor), Stage 2 Cooling (both compressors run) or
Stage 1 Heating (both compressors run on 8--12 systems.
The 04--07 systems have only one compressor).
Summary of Contents for WeatherMaster 50HCQA04
Page 38: ...38 C10818 Fig 56 RTU OPEN Control Module ...
Page 78: ...78 APPENDIX V WIRING DIAGRAMS C150427 Fig 58 50HCQA04 A05 Control Wiring Diagram 575 3 60 ...
Page 80: ...80 APPENDIX V WIRING DIAGRAMS C160013 Fig 60 50HCQ 06 Control Wiring Diagram 575 3 60 ...
Page 84: ...84 APPENDIX V WIRING DIAGRAMS C150243 Fig 64 50HCQ 04 05 06 Power Wiring Diagram 208 230 1 60 ...
Page 85: ...85 APPENDIX V WIRING DIAGRAMS C12347 Fig 65 50HCQ 04 05 06 Power Wiring Diagram 208 230 3 60 ...
Page 86: ...86 APPENDIX V WIRING DIAGRAMS C12353 Fig 66 50HCQ 04 05 06 Power Wiring Diagram 460 3 60 ...
Page 87: ...87 APPENDIX V WIRING DIAGRAMS C12354 Fig 67 50HCQ 04 05 06 Power Wiring Diagram 575 3 60 ...
Page 91: ...91 APPENDIX V WIRING DIAGRAMS C12356 Fig 71 50HCQ 12 Power Wiring Diagram 460 3 60 575 3 60 ...
Page 92: ...92 APPENDIX V WIRING DIAGRAMS C150432 Fig 72 50HCQ PremierLink Control Diagram ...
Page 93: ...93 APPENDIX V WIRING DIAGRAMS C12359 Fig 73 50HCQ RTU Open Control Diagram ...