CSZ MICRO-TEMP LT 749 - Pump Replacement; Replacement of the Pump

FIELD REPAIR/SERVICE MICRO-TEMP
®
LT, Model 749
OPERATION AND TECHNICAL MANUAL
Page 47 of 75
N. Insert and lock the 2 white wires from the heater into the 2 open slots on the 6-
position connector (position number 3 and 5).
O. Insert and reposition reservoir back into rear enclosure.
P. Tighten hose clamp on the connecting hose between the reservoir outlet and the
pump inlet.
Q. Reconnect the red 6-position connector to control board (J7 position).
R. Place the following in the order numbered below on the top of the kepnut on the
enclosure bracket:
1. Equipment ground terminal ground wire.
2. Heater ground wire.
3. Display ground wire.
4. Alarm enable ground wire (small green wire).
5. Secure with the 6-32” nylon locknut.
S. Check that all cables are still attached to control board before closing unit.
T. Reconnect front and rear enclosure as described in Section (5-2.2).
U. Refill the reservoir as described in Section (4-2.2).
5-4. REPLACEMENT OF THE PUMP
A. Obtain replacement pump.
NOTE: When replacing the pump, be aware of the inline capacitor.
B. Drain the reservoir as described in Section (4-2.1).
C. Separate the front and rear enclosure as described in Section (5-2.1).
D. Unscrew hose clamps attached to both the pump inlet and reservoir outlet.
E. Cut wire tie attached to pump outlet.
F. Disconnect elbow from pump outlet.
WARNING
 Always unplug the unit before accessing internal components during service. Failure to
unplug the unit could result in electric shock.
CAUTION
 Always drain the MICRO-TEMP
®
LT unit to a sanitary drain because bio-contaminants may be
present in the unit’s water supply.