Manitowoc Ice QM45 Series - Manual (Page 20)

Ice Machine Operation Section 3
3-4
Operational Checks
GENERAL
Your Manitowoc ice machine was factory-operated
and adjusted before shipment. Normally, a newly
installed ice machine does not require any
adjustment.
To ensure proper operation, always follow these
Operational Checks when starting the ice machine:
• for the first time
• after a prolonged out of service period
• after cleaning and sanitizing
Routine adjustments and maintenance procedures
outlined in this manual are not covered by the
warranty.
SIPHON SYSTEM
To reduce mineral build-up and cleaning frequency,
the water in the sump trough must be purged during
each harvest cycle.
When the water pump de-energizes the level in the
water trough rises above the standpipe starting a
siphon action. The siphon action stops when the
water level in the sump trough drops below the
siphon cap. When the siphon action stops, the float
valve refills the water trough to the correct level.
Siphon System Check
Follow steps 1 through 6 under water level check.
WATER LEVEL CHECK
Check the water level while the ice machine is in the
clean mode and the water pump is running. The
correct water level is 1/4" (6.3mm) to 3/8
″ (9.5mm)
below the top of the standpipe.
The float valve is factory-set for the proper water
level. If adjustments are necessary:
1. Verify the ice machine is level (see page 2-3).
2. Remove the siphon cap from the standpipe.
3. Place the main ICE/OFF/WASH toggle switch to
the WASH position, and wait until the float valve
stops adding water.
4. Adjust the water level to 1/4" (6.3mm) to 3/8"
(9.5mm) below the standpipe:
A Loosen the two screws on the float valve
bracket.
B Raise or lower the float valve assembly as
necessary, then tighten the screws.
5. Move the main ICE/OFF/ WASH toggle switch
to the OFF position. The water level in the trough
will rise above the standpipe and run down the
drain.
6. Replace the siphon cap on the standpipe, and
verify water level and siphon action by repeating
steps 3 through 5.
SV1689-2
DRAIN
STANDPIPE
SIPHON
CAP WATER LEVEL
Water Level
1/4” TO 3/8 ″(6.3 TO 9.5 MM) BELOW TOP OF
STANDPIPE
SV1689-2
SIPHON CAP