Bunn Nitron Cold Draft Service & Repair Manual page 22

SERVICE (CONT.)
Compressor (Cont.)
Removal and Replacement:
Compressor Relay: Refer to FIG. 9
1. Remove the terminal cover (1)
2. Disconnect the white wire from the compressor
relay.
3. Pull relay (2) off of the compressor pins.
4. Remove overload protector (3) and discard relay.
5. Install the overload protector on to the new relay.
6. Push new relay onto the compressor pins.
7. Refer to Fig. 9 and reconnect the wires.
8. Reinstall terminal cover (1).
Compressor Thermal Overload Protector: Refer to
FIG. 9
1. Remove terminal cover (1).
2. Disconnect the BLU/BLK wire of the harness from
the thermal overload protector.
3. Remove relay (2).
4. Remove overload protector (3) and discard overload
protector.
5. Install new overload protector (3) on to the relay.
6. Install relay (2) on to the compressor.
7. Refer to Fig. 10 and reconnect the thermal overload
protector wires.
8. Reinstall terminal cover (1).
Compressor Assy:
NOTE: Before removal of any refrigeration component
the refrigerant in the system must be reclaimed by a
licensed refrigeration repair person.
NOTE: When replacing the compressor it is recom-
mended that the dryer also be replaced.
1. Disconnect the tubes from the condenser and the
accumulator.
2. Disconnect the compressor wiring harness from
the dispenser main wiring harness.
3. Remove the four .25-20 keps nuts and washers
securing the compressor to the chassis. Set nuts
and washers aside for reassembly.
4. From the right side of the dispenser lift the com-
pressor assembly over the four studs in the chassis
and remove compressor.
2 3
FIG. 9 COMPRESSOR THERMAL
OVERLOAD PROTECTOR LOCATION
1. Compressor Terminal Cover
2. Compressor Relay
3. Thermal Overload Protector
5. Install new compressor over the four studs in the
dispenser chassis with the fill valve to the left side
of the dispenser.
6. Secure compressor to the dispenser chassis using
four .25-20 keps nuts and washers.
7. Reconnect tubes from the condenser and the ac-
cumulator to the compressor.
8. Evacuate the system.
9. Recharge system with:
9 oz. Type R134A refrigerant.
Design Pressures: High 255 - Low 36 psi
NOTE: The charging of the system must be done by a
licensed refrigeration repair person.
NOTE: Refer to Wiring Diagrams when reconnecting
wires to Compressor, Thermal Overload Protector and
Start Relay.
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P4040.13
55124 021418