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NOTE: Cold water will absorb more heat faster than warm water. The water flow will therefore automati-
cally increase as inlet temperature increases.
CONDENSER MODULATING VALVE REMOVAL
1. Disconnect power to unit, shut off water supply to condenser, then reclaim refrigerant from system.
2. Remove inlet water line from Condenser modulating Valve. Also remove tube from refrigerant high side
line.
3. Remove Condenser Modulating Valve and bracket from unit.
4. Remove valve from bracket.
5. Replace Condenser Modulating Valve by reversing Steps 2 thru 4, then pull system into vacuum.
6. Recharge unit with refrigerant per nameplate.
7. Turn power and water on to the unit.
8. With unit operating, adjust modulating valve to proper setting.
9. Go through a complete system check.
GEAR MOTOR
The gear motor is equipped with a start relay and a manual reset overload. When current is applied, the relay
energizes and completes the circuit to the start winding. The motor reaches a predetermined speed and the
relay drops out, disconnecting the start winding. The run winding remains in the circuit as long as current is ap-
plied.
The purpose of the overload is to automatically shut off the motor in the event of a mechanical bind of the trans-
mission, an overload condition within the evaporator, or an electrical malfunction. It does this by sensing amper-
age draw. If the motor stalls the start relay would energize and stay energized. The amperage would surge to 5
to 6 times greater than normal draw. In this event, the overload would shut off the transmission in 4 to 8 sec-
onds.
If the motor is subjected to an abnormal load, but does not reach stall condition, the overload will react, but over
a greater period of time. The reaction time depends upon the amperage to which it is subjected.
The overload, through the safety circuit, also shuts off the compressor.
Refer to Troubleshooting Guide.
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Table of Contents
Troubleshooting
