Manitowoc Q 800 Installation And Use Manual page 21

Section 4
Water Dump Valve
The water dump valve normally does not require
removal for cleaning. To determine if removal is
necessary:
1. Locate the water dump valve.
2. Set the toggle switch to ICE.
3. While the ice machine is in the freeze mode,
check the dump valve's clear plastic outlet drain
hose for leakage.
A. If the dump valve is leaking, remove,
disassemble and clean it.
B. If the dump valve is not leaking, do not
remove it. Instead, follow the "Cleaning
Procedure" on page 4-3.
Follow the procedure below to remove the dump
valve.
Disconnect the electric power to the ice machine at
the electric service switch box and turn off the
water supply before proceeding.
1. If so equipped, remove the water dump valve
shield from its mounting bracket.
2. Lift and slide the coil retainer cap from the top of
the coil.
3. Note the position of the coil assembly on the
valve for assembly later. Leaving the wires
attached, lift the coil assembly off the valve body
and the enclosing tube.
4. Press down on the plastic nut on the enclosing
tube and rotate it 1/4 turn. Remove the enclosing
tube, plunger, and plastic gasket from the valve
body.
NOTE: At this point, the water dump valve can easily
be cleaned. If complete removal is desired, continue
with step 5.
WARNING
DRAIN
HOSE
VALVE
SHIELD
Dump Valve Removal
Important
The plunger and the inside of the enclosing tube
must be completely dry before assembly.
NOTE: During cleaning, do not stretch, damage or
remove the spring from the plunger. If it is removed,
slide the spring's flared end into the plunger's slotted
top opening until the spring contacts the plunger
spring stop.
5. Remove the valve body.
6. Remove the tubing from the dump valve by
twisting the clamps off.
7. Remove the two screws securing the dump valve
and the mounting bracket.
PLUNGER
SPRING STO
CAP
Dump Valve Disassembly
COIL
SPRING
ENCLOSING
TUBE
Dump Valve Disassembly
Maintenance
3. RETAI
NING
CAP
COIL
WATER
DUMP
DO NOT
VALVE
DISCONNECT
WIRES AT COIL
P
PLUNGER
3. DIAPH
RAM
VALVE BODY
4-5