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5. Wiring Information
Cooler - Air Defrost Systems - Single Phase
Diagram 1. Wiring Diagram for System, Air Defrost 208-230/1/60 (B): Models PTT047H2B, PTT063H2B,
PTT072H2B, PTT099H2B, and PTT128H2B.
Medium and Large Cabinet Models Wiring. 208-230/1/60 voltages.
YELLOW
BLACK
N
RT
L C
BLACK
BLUE
BLACK
BLUE
0 - Unit Off ( Not an electrical disconnect)
-Defrost termination temperature = 3.5°C / 38°F
-Defrost sensor has 59" lead length and a blue label.
Approximate dial settings of room thermostat dial:
-(3) Hours of compressor run time between defrosts.
Minimum compressor run time - 1 minute
Minimum compressor off time - 4 minutes
-Room temp sensor has 59" lead length
6 - 34°F / 1°C
5 - 38°F / 3°C
4 - 41°F / 5°C
3 - 45°F / 7°C
1 - 52°F / 11°C
Room Thermostat Notes:
CC
RT -- ROOM THERMOSTAT
CFM -- CONDENSER FAN MOTOR
CC -- COMPRESSOR CONTACTOR
EFM -- EVAPORATOR FAN MOTOR
LEGEND
HL -- HEATER LIMIT THERMOSTAT
DH -- DEFROST HEATER
GND -- GROUND
RC -- RUN CAPACITOR
SR -- START RELAY
USE COPPER CONDUCTORS ONLY
NOT
FACTORY WIRING
FIELD WIRING
(WHEN PLUG
PROVIDED)
SC -- START CAPACITOR
HPS -- HIGH PRESSURE SWITCH
PRIMARY SINGLE PHASE PROTECTION PROVIDEDPRIMARY SINGLE PHASE PROTECTION PROVIDED
CCH -- CRANKCASE HEATER
PFC -- PRESSURE FAN CYCLE SWITCH
DLT -- DRAIN LINE THERMOSTAT
DLH -- DRAIN LINE HEATER
TFC -- TEMPERATURE FAN CYCLE SWITCH
WN -- WIRE NUT
SW -- SWITCH
SC
COMPRESSOR
R S
C
3
RC
2 1
1
2
5
SR
208-230V/1PH/60HZ
CC
L1T1
L2T2
BLACK
BLACK
GND
CFM
CFM
EFM
EFM
EFM
DLH
YELLOW
WHITE
WN
DLT
GRAY
WN
WN
GRAY BLUE
CCH
BLACKBLACK
YELLOW
PFC
WN
L1
T1
WN
TFC
Rev 2.47
Large Cabinet
Large Cabinet
Outdoor Units Only
Outdoor Units Only