Water Regulating Valve - Manitowoc MD0420A Technician's Handbook

WATER REGULATING VALVE

Water-Cooled Models Only
FUNCTION
The water regulating valve maintains the freeze cycle
discharge pressure.
CHECK PROCEDURE
1. Determine if the head pressure is high or low
(refer to cycle time/24 hour ice production and
operational pressure chart for the model you are
servicing).
2. Verify the condenser water meets specifications.
3. Adjust valve to increase or decrease discharge
pressure.
4. Determine the temperature of the liquid line
entering the receiver by feeling it. This line is
normally warm; body temperature.
5. Using the information gathered, refer to the list for
diagnosis.
Problem (Freeze Cycle)
Valve not maintaining discharge pressure.
• Valve incorrectly set, dirty or defective. Adjust,
clean or replace valve.
Discharge pressure extremely high; Liquid line
entering receiver feels hot.
• Water regulating valve incorrectly set or not
opening.
Discharge pressure low, Liquid line entering
receiver feels warm to hot.
• Ice machine low on charge. Verify Total System
Refrigerant Charge.
Part Number 040005626 5/17 103