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5. Wiring Information
Small Cabinet Models Wiring. 115/1/60 voltage.
Cooler - Air Defrost Systems
Diagram 2. Wiring Diagram for System, Air
Defrost 115/1/60 model PTN040H2A.
Diagram 1. Wiring Diagram for
System, Air
Defrost 115/1/60 models PTN024H2A and PTN029H2A.
Model:
LEGEND
Room Thermostat\Defrost Control Notes:
-Defrost termination temperature = 3ºC. / 38ºF
.
Approximate dial settings of room thermostat dial:
-Defrost sensor has 59" lead length and a blue label.
-Defrost periods occur every 7.5 hours.
-Room temp sensor has 59" lead length.
Minimum compressor off time - 4 minutes
Minimum compressor run time - 1 minute
GND------GROUND
HPS ---- HIGH PRESSURE SWITCH
CFM -----CONDENSER FAN MOTOR
EFM------EVAPORATOR FAN MOTOR
EFM
BLK
WH
INSULATED
EV
AP SECTION
BLK
RT\DC ---ROOM T-STAT\DEF CONT
SC------START CAPACITOR
SR ----- START RELA
Y
6 - 34ºF. / 1ºC.
5 - 38ºF. / 3ºC.
0 - Unit Off ( Not an electrical disconnect)
4 - 41ºF. / 5ºC.
3 - 45ºF. / 7ºC.
1 - 52ºF. / 11ºC.
RELAY
BLK
HPS
BLK
CFM
1
3
2
4
BL
K
BL
K
BL
K
WH
WH (RIBBED)
(RIBBED)
R
BLK
BLK
SC
SR
1
R
2
S
WH
WH
BLK
COMPRESSOR JUNCTION BOX
CO
MPRESSOR
C
S
WH
PLUG IN CONNECT
OR
L
1
BLK
BLK
BLK
PLUG
BLK
BLK
WH (RIBBED)
GRN
GND
GRN
TIMER
WH
BL
K
C
3
N
5
RT\D
C
PTN024H2A
Rev 2.3
1
Model:
LEGEND
RT\DC
5
N
C
3
WH
TIMER
GRN
GND
GRN
WH (RIBBED)
BLK
BLK
STRAIN
BLK
PLUG
RELIEF
BLK
BLK
L
1
PLUG IN CONNECTO
R
SR
5
12
BLK
BLUE
JUNCTION BOX
BLK
WH
WH
RED
BLK
SC
YEL
RC
YEL
RED
(RIBBED)
WH
BLK
BLK
3
1
BLK
4
2
BLK
HPS
BLK
BLK
RELAY
-Room temp sensor has 59" lead length.
-Defrost periods occur every 7.5 hours.
-Defrost sensor has 59" lead length and a blue label.
Approximate dial settings of room thermostat dial:
-Defrost termination temperature = 3ºC. / 38ºF
.
Room Thermostat\Defrost Control Notes:
Minimum compressor run time - 1 minute
Minimum compressor off time - 4 minutes
RT\DC ---ROOM T-STAT\DEF CONT
SC------START CAPACITOR
SR ----- START RELA
Y
BLK
BLK
OVERLOAD
THERMAL
BLK
S
R
C
YEL
RED
CO
MPRESSOR
INSULATED
EV
AP SECTION
WH
BLK
EFM
CR ----- RUN CAPACITOR
CFM -----CONDENSER FAN MOTOR
EFM------EVAPORATOR FAN MOTOR
RC------RUN CAPA
CITOR
GND------GROUND
HPS ---- HIGH PRESSURE SWITCH
BLK
CFM
6 - 34ºF. / 1ºC.
5 - 38ºF. / 3ºC.
0 - Unit Off ( Not an electrical disconnect)
4 - 41ºF. / 5ºC.
3 - 45ºF. / 7ºC.
1 - 52ºF. / 11ºC.
PTN040H2A
Rev 2.31