Micro Matic Pro-Line MMPP4301-EP Service Manual page 12

(MMPP4301-EP, MMPP4301, MMPP4301-WC, MMPP4301-PKG, MMPP4301-PKG-WC, MMPP4302, MMPP4302-WC,
MMPP4302-PKG, MMPP4302-PKG-WC, MMPP4303-PKG, MMPP4303-PKG-WC, MMPP4303-PKG-3, MMPP4305-PKG,
MMPP4305-PKG-WC, MMPP4305-PKG-3, MMPP4305-PKG-WC3, MMPP4307-PKG, MMPP4307-PKG-WC,
MMPP4307-PKG-3, MMPP4307-PKG-3-WC, MMPP4307-PKG-4, MPP4307-PKG-4-WC)
Note: Replacement motor is not supplied with electrical cord. Remove and reuse cord from defective motor.
1. Unplug unit from receptacle.
2. Support pump and loosen clamp holding pump to motor. As clamp is loosed pump will eventually
disconnect from motor. Make sure pump does not damage glycol supply line as it becomes free from motor.
3. With pump free from motor remove drive key and replace.
4. While supporting motor remove four (4) nuts and hardware from mounting studs.
5. Mount new motor by aligning mounting bracket with mounting studs and reattaching mounting nuts and
hardware. Note: new motor is supplied with mounting bracket.
6. Reattach pump to motor with clamp making sure new drive key aligns with motor shaft.
7. Locate defective motor and remove electrical connection cover plate (follow cord to where it enters back
of motor) exposing cord connections. Remove ground connection by unscrewing green screw and
removing ground wire. Unplug remaining 2 wires by pulling firmly on connections. Reattach cord to new
motor by affixing ground wire to green ground screw and plugging 2 wires to motor connections. Place
cord in electrical wire channel in motor housing and reattach electrical connection cover plate.
8. Plug cord into receptacle.
1. Unplug power pack
2. I nsert a small flat head screwdriver between the thermostat faceplate and the panel and twist the screwdriver at the
top, bottom, and ends of the faceplate to remove the faceplate.
3. After the faceplate is removed, slide the thermostat forward through the mounting hole.
4. Remove the wires from the slip on terminals and the temperature probe from the back of the thermostat.
5. Insert the yellow wire on terminal one, black wire on terminal two, white wire on terminal three. The temperature probe
flat plug will push into s1 on the new thermostat.
6. Slide the thermostat back into the mounting hole and snap the faceplate onto the thermostat.
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REPLACING MOTOR
REPLACING THERMOSTAT IN ALL UNITS