Greenheck MPX (472695) - Manual (Page 14)

Typical Wiring Diagram
This is a typical wiring diagram for this unit. A model-specific wiring diagram is attached to the inside of the
control center door of each unit. The wiring diagram includes a legend highlighting which accessories or options
are provided by the factory. Factory wiring and required field wiring are also indicated.
UNIT CONTROL
C R
G
NO1
NO2
C4
NO5
NO6
J13
J12
GO
J1
C1
NO4
7
NO7
C7
J14
VG
Y2
Y3
Y1
Y4
VG0
J4
IDC1
ID8
ID7
ID6
ID5
ID1
ID4
ID3
ID2
J5
BC5
B5
BC4
B4
+VDC
B3
B2
B1
J2
J3
DDC
CONTROLLER
NO8 NC8 C8
J15
ALARM
12
GND
R
R7
21 24
12
FPS
NO C
90
NO3
OAI
OAD
ACC
CC1
HPS1 LPS1
54 55
A2
56
A2
A2
A1
CF1
A1
A1
CF2
R7
51 53
COMPONENTS LOCATED IN COMPRESSOR COMPARTMENT
13 14
CC1
A2 A1 11 14
R20
W
BL
Y
PK
Y
BL
W
PK
BL
R
BL W
R
R
BR
COMPRESSOR/CONDENSER FAN CONTROL
R G
S3
NC C
FSC
Typical Fire System Wiring
If unit is to be wired to a fire system, the
normally closed contacts shall be placed
in series with terminals R & G and the
supply fan switch S3 to shut down the
supply fan.
IB
IN
24V+
+4-20
-4-20
GND
24V-
BLK
WHT
GRN
RED
BLK WHT GRN RED
RBV
64 63
66
C
HOT GAS REHEAT CONTROLLER
BL Y
BK
W
CN2 CN3 CN4
BLK WHT GRN RED
RHV
ACC COLD COIL TEMP SENSOR
CC# COMPRESSOR CONTACTOR
CF# CONDENSING FAN CONTACTOR
CH# CRANKCASE HEATER
D1 INLET DAMPER
DB1 DISTRIBUTION BLOCK
DL1 INLET DAMPER LIMIT SWITCH
DS1 DISCONNECT SWITCH - UNIT
FCS# FAN CYCLING SWITCH
FPS FAN PROVING SWITCH
FU# FUSE
HPS# HIGH PRESSURE SWITCH
HS DEHUMIDISTAT
IB# INTERFACE BOARD
LPS# LOW PRESSURE SWITCH
M MOTOR
OAD SUPPLY DISCHARGE TEMP SENSOR
OAI INLET AIR TEMP SENSOR
OL OVERLOAD
PM PHASE MONITOR
PS1 DIRTY FILTER SWITCH
R20 COMPRESSOR RELAY CIRCUIT A
R21 COMPRESSOR RELAY CIRCUIT B
R7 COMPRESSOR INTERLOCK RELAY CIRCUIT A
R8 COMPRESSOR INTERLOCK RELAY CIRCUIT B
RBV REHEAT VALVE - CONDENSER
RH HEAT RELAY
RHV REHEAT VALVE - HOT GAS REHEAT
S1 EXHAUST SWITCH
S3 SUPPLY SWITCH
S4 TEMPERING SWITCH
ST# EXHAUST FAN CONTACTOR
ST1 SUPPLY FAN CONTACTOR
TR# TRANSFORMER
TS4 ZONE TEMPERATURE SENSOR
CAUTION
UNIT SHALL BE GROUNDED IN ACCORDANCE WITH N.E.C.
POWER MUST BE OFF WHILE SERVICING.
NOTES
USE COPPER CONDUTORS ONLY
60° C FOR TERMINALS RATED LESS THAN 100 AMPS.
75° C FOR TERMINALS RATED 100 AMPS OR MORE.
FIELD CONTROL WIRING RESISTANCE SHOULD
NOT EXCEED 0.75 OHM.
FIELD WIRED
FACTORY SUPPLIED AND WIRED
LEGEND
WIRE COLOR CODE
Wiring Diagram Code:
BK BLACK BL BLUE BR BROWN
GY GRAY LT BL LIGHT BLUE O ORANGE
PK PINK PR PURPLE R RED
W WHITE Y YELLOW
Wiring Template: P00
GMY2S000B00
DDC Code: TAP - Version 1.04
GI1CA61B2A02D31AP01
111 112
SUPPLY FAN
M
MAIN POWER
TO UNIT
GROUND
L1
L2
L3
DB1
DS1
Y Y-
PM
T1
T2
T3
PM
C
OUT
DL1
4 D1
S4 S6
Y
1 2
ST1 O.L.
95 96
ST1
A2 A1
LT BL
ST1 OL
PS1
NO C
R R8
11 14
R21
A1 A2
11 14
R21
R R
BR
CC2
13 14
BR
CC2
A2 A1
BR
R7
11 14
R20
A2 A1
Y1
BR BR
24 21
R8
LPS2 HPS2
57 58
A2 A1
R8
FCS2
FCS1
BR
BL
BL
LT BL
LT BL
NTC
M
NTC
TS4
80
81
BL
BL
66
Y
RH
A2 A1
W1
BR BR
RH
11 14
ST2
A2 A1
ST2
ST2 O.L.
95 96
Y Y
14 13
FACTORY WIRING
TO IG FURNACE
38
Y 29
32
FACTORY WIRING
TO IG FURNACE
72 71
H
3 G
3
3
O
S1
S3
82
83
HS PK
PK
Tempering Switch on Remote Panels
For remote panels with tempering
switches, the jumper between terminals
7 and 12 should be removed for proper
switch operation.
7 12
S4
®
TR1
R
C
24 VAC
75 VA
C
TR2
72 71
24 VAC
75 VA
TR3
64 63
24 VAC
40 VA
FU6
TR4
102 101
120 VAC
250 VA
CONDENSING FAN 1 & 2
CONDENSING FAN 3
M M M
COMPRESSOR 1
COMPRESSOR 2
M
CF2
CF1
CC2
M
M
M
CC1
CH1 CH2
FU2
FU1
OL ST2 FU7
M
EXHAUST FAN 1
460V
14 Model MPX Make-Up Air Unit
®