Finish Thompson BE-15/15C User Manual

Page 38

VACUUM/CIRCULATION PUMP SERVICING:

The Vacuum/circulation Pump is located on top of the Pump Reservoir. This centrifugal-type pump is
powered by a close-coupled TEFC electric motor rated at 1/2 hp, 3450 rpm, 230 volt, 1 phase, 60 hertz. The
motor is wired for clock-wise rotation when facing the motor’s fan.

Disconnect electrical power to the BE unit before working on

or repairing the Vacuum/circulation Pump and motor.

Pump and motor removal and re-installation:

1. Remove the front panel and top panel of the BE unit and set aside. Be careful—there are four wires and a

hose attached to the top panel. Set the top panel on its right side on top of a crate or other support near
the right front corner of the unit. If desired, remove the hose and wires from the top panel, noting and
tagging the proper wire locations for the On/off switch.

2. Open the electrical connection box on the side of the motor. Disconnect the BE unit’s wires #8 and #9

from the motor’s wiring (they are connected with wire nuts). Loosen the plastic conduit from the motor’s
connection box (there is a plastic nut holding the conduit inside the connection box) and pull the BE
unit’s two wires and conduit away from the motor.

3. Tilt the pump’s motor to the side to expose the Circulation Pump and the Aspirator. Loosen the hose

clamps and remove the two hoses from the pump’s elbow and the Aspirator. Pull the removed hoses out
from the motor’s mounting plate. Also pull the third “open” hose from the motor’s mounting plate. Lift
the entire pump and motor assembly from the Pump Reservoir and set it on a workbench for further
disassembly.

4. After repairs are performed on the pump and

motor, the re-installation of the pump and motor
assembly are the same as the removal, but in the
opposite order.

IMPORTANT: Proper re-wiring of the motor (for
clockwise rotation when facing the motor fan) is
critical. Refer to the motor wiring diagram to the
right for details.

IMPORTANT: Proper reinstallation of the hoses
is critical:
 The hose that attaches to the pump’s elbow

leads to the Condenser.

 The hose that attaches to the Aspirator leads to

port 2 of the Divert Valve.

 The “open” hose leads to the top of the Radiator.

Refer to the “Pump and motor disassembly and reassembly” sections that follow for details on further
servicing the pump and motor.

CAUTION:

P1 P2 T5 T3 T2

T8 T4

CLOCKWISE ROTATION

(FACING FAN)

PUMP MOTOR WIRING