Headmaster Valve Water-Cooled Condensing Unit - Cvd1476 - Manitowoc QuietQube SD0672C Technician's Handbook

HEADMASTER VALVE WATER-COOLED
CONDENSING UNIT - CVD1476
Freeze Cycle
The water regulating valve setting is higher than the
head pressure control valve set point. All refrigerant is
directed through the condenser and the water
regulating valve maintains the correct head pressure.
Harvest Cycle
The headmaster control valve diverts the compressor
discharge gas to the ice machine receiver in the
harvest cycle. All refrigerant flow through the
condenser in the harvest cycle stops. Symptoms of a
headmaster valve that will not seat 100% closed in the
harvest cycle (completely bypass the condenser) are:
• Freeze cycle suction and discharge pressure are
normal.
• The control board indicates safety limit #2.
• Harvest cycle suction pressure is low.
• Harvest cycle discharge pressure is normal or high
(water regulating valve attempts to maintain 240
psig).
212 Part Number 80-1505-3 6/11