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76
Table 23 – MBB Connections
DISPLAY
NAME
POINT DESCRIPTION
SENSOR LOCATION
TYPE OF I/O
CONNECTION
PIN NUMBER
INPUTS
Input power from TRAN1
control box
24 VAC
J1, 1---3
HUM
IGC Fan Request or
Humidistat switch input
gas section /
space
switch input
J6, 4
FDWN
Fire shutdown switch
supply/return/space
switch input
J6, 6
G
Thermostat G (Fan)
space
switch input
J7, 2
W2
Thermostat W2 (2nd Stage Heat)
space
switch input
J7, 4
W1
Thermostat W1 (1st Stage Heat)
space
switch input
J7, 6
Y2
Thermostat Y2 (2nd Stage Cool)
space
switch input
J7, 8
Y1
Thermostat Y1 (1st Stage Cool)
space
switch input
J7, 10
FIL.S
Filter status switch
indoor fan section
switch input
J9, 2---3
CS.A1
Compressor A1 Current Sensor
control box
0---5vdc digital input
J9, 4---6
CS.B1 or
CS.A2
Compressor B1 or
A2 Current Sensor
control box
0---5vdc digital input
J9, 7---9
CS.C1 or
CS.B1
Compressor C1or
B1 Current Sensor
control box
0---5vdc digital input
J9, 10---12
SPT
Space temperature (T55/56)
space
10k thermistor
J8, 1---2
SPTO or
RAT
Space temperature offset (T56) or
Return air temperature
space or return
10k thermistor
J8, 2---3
OAT
Outdoor air temperature
outdoor coil support
10k thermistor
J8, 5---6
SAT
Supply air temperature
indoor fan housing, or
supply duct
10k thermistor
J8, 7---8
SCT.A
Saturated condenser temperature, circuit A
outdoor coil, circuit A
5k thermistor
J8, 9---10
SCT.B
Saturated condenser temperature, circuit B
outdoor coil, circuit B
5k thermistor
J8, 11---12
SCT.C
Saturated condenser temperature, circuit C
outdoor coil, circuit C
5k thermistor
J8, 13---14
FAN.S
Fan status switch
indoor fan section
switch input
J8, 15---16
SSP.A
Suction pressure, circuit A
compressor A suction
0---5 VDC pressure
transducer
J8, 18---20
SSP.B
Suction pressure, circuit B
compressor B suction
0---5 VDC pressure
transducer
J8, 21---23
SSP.C
Suction pressure, circuit C
compressor C suction
0---5 VDC pressure
transducer
J8, 24---26
OUTPUTS
CRC
Cooling Reheat Control
relay
J10, 3
CMP.C or
OFC.2
Compressor C1 relay or
Outdoor fan 2 relay
relay
J10, 6
COMP.B
Compressor B1 relay
relay
J10, 9
COMP.A
Compressor A1 relay
relay
J10, 11
CCH or
OFC.3
OFC.1
Crankcase heat relay or
Outdoor fan 3 relay or
Outdoor fan 1 relay
relay
J10, 13
OFC.2 or
RH2.B
Outdoor fan 2 relay or
Reheat 2 valve circuit B & C
relay
J10, 16
OFC.1 or
RH2.A
Outdoor fan 1 relay or
Reheat 2 valve circuit A
relay
J10, 19
IDF
Indoor fan relay
relay
J10, 21
ALRM
Alarm relay
relay
J10, 23
HT.1
Heat Stage 2 relay
relay
J10, 25
HT.2
Heat Stage 1 relay
relay
J10, 27
COMMUNICATION
Local Equipment Network (LEN)
communication
J5, 1---3
Carrier Comfort Network (CCN)
communication
J5, 5---7
Network device power
24 VAC
J5, 9---10
Scrolling Marquee Display (LEN)
communication
J4, 1---3
Scrolling Marquee Display power
24 VAC
J4, 5---6
Optional ECB (LEN)
communication
J3, 1---3
Optional ECB power
24 VAC
J2, 1---2
48/
50P
G
and
P
M
Summary of Contents for 48/50PG Series
Page 32: ...32 C07009 Fig 20 Air Baffle Dimensions 48 50PG03 16 48 50PG and PM...
Page 33: ...33 C08077 Fig 21 Air Baffle Dimensions 48 50PG20 28 and 48 50PM16 28 48 50PG and PM...
Page 58: ...58 C08549 Fig 28 48PG03 16 Control Wiring Schematic 48 50PG and PM...
Page 59: ...59 C08550 Fig 29 50PG03 16 Control Wiring Schematic 48 50PG and PM...
Page 64: ...64 C08471 Fig 34 Typical 48PG and PM16 28 Control Schematic 48PM16 28 Shown 48 50PG and PM...
Page 66: ...66 C08557 Fig 36 Typical 50PG and PM16 28 Control Schematic 50PG20 28 Shown 48 50PG and PM...
Page 68: ...68 C08558 Fig 38 Typical 48 50PG and PM16 28 Power Schematic 48 50PM16 28 Shown 48 50PG and PM...
Page 72: ...72 C08565 Fig 42 Typical 48 50PG20 28 Component Arrangement 48 50PG20 24 Shown 48 50PG and PM...
Page 73: ...73 C08067 Fig 43 48 50PM16 28 Component Arrangement 48 50PG and PM...
Page 74: ...74 C08562 Fig 44 48 50PM16 28 with Humidi MiZert Component Arrangement 48 50PG and PM...
Page 208: ...208 48 50PG and PM...