Scotsman MC 15, Service Manual

Page 11

Page 11

Since water is the most important single ingredient
in producting ice you cannot emphasize too
much the three items listed above.
Low water pressure, below 1 bar may cause
malfunction of the ice maker unit.
Water containing excessive minerals will tend to
produce cloudy coloured ice cubes, plus scale
build-up on parts of the water system.

Water supply

Connect the 3/4" GAS male  fitting of the solenoid
water inlet valve, using flexible tubing or a 3/8"
O.D. copper pipe, to the cold water supply line
with regular plumbing fitting and a shut-off valve
installed in an accessible position between the
water supply line and the unit.

Water supply - Water cooled models

The water cooled versions of SCOTSMAN Ice
Makers require two separate inlet water supplies,
one for the water sprayed for making the ice
cubes and the other for the water cooled
condenser.
Connect the 3/4" GAS male fitting of the water
inlet, using the flexible tubing or a 3/8" O.D.
copper pipe, to the cold water supply line with
regular plumbing fitting and a shut-off valve
installed in an accessible position between the
water supply line and the unit.

Water drain

The recommended drain tube is a plastic or
flexible tube with 18 mm (3/4") I.D. which runs to
an open trapped and vented drain. When the
drain is a long run, allow 3 cm pitch per meter
(1/4" pitch per foot).
A vent at the unit drain connection is also required
for proper sump drainage;

Water drain - Water cooled models

Connect the 3/4" GAS male fitting of the
condenser water drain, utilizing a second flexible
tubing or a 3/8" O.D. copper tubing, to the open
trapped and vented drain.

NOTE. The water supply and the water drain
must be installed to conform with the local
code. In some case a licensed plumber and/
or a plumbing permit is required.

F.

FINAL CHECK LIST

1.

Is the unit in a room where ambient

temperatures are within a minimum of 10

°

C

(50

°

F) even in winter months?

2.

Is there at least a 15 cm (6") clearance

around the unit for proper air circulation?

3.

Is the unit level? (IMPORTANT)

11. The interface P.C. Board is now ready to
stop simultaneously the operation of the two
units when the infrared beam of the ice level
control is interrupted by the stored ice cubes.

ATTENTION. After removal of the ice
cubes both units resume their operation
starting from the beginning of freezing
cycle.
During the first freezing cycle it could be
posible that the ice cubes produced by
one of the two ice makers be not of correct
shape (cloudy and shallow) due to an
insufficient water level in its sump tank.
This minor problem will desappear in the
next batch because in the harvest cycle
the sump tank will be properly filled-up.

12. Stick, with accuracy, the rubber stripe onto
the upper edge of the front panel of the lower unit
in order to fill the air gap between the two
machines.

13. Place again in their position the two ice
chutes and finally re-fit the service panels
previously removed.

E.

ELECTRICAL CONNECTIONS

See data plate for current requirements to
determine wire size to be used for electrical
connections. All SCOTSMAN icemakers require
a solid earth wire.
All SCOTSMAN ice machines are supplied from
the factory completely pre-wired and require only
electrical power connections to the wire cord
provided at the rear of the unit.
Make sure that the ice machine is connected to
its own circuit and individually fused (see data
plate for fuse size).
The maximum allowable voltage variation should
not exceed -10% and +10% of the data plate
rating. Low voltage can cause faulty functioning
and may be responsible for serious damage to
the overload switch and motor windings.

NOTE. All external wiring should conform to
national, state and local standards and
regulations.

Check voltage on the line and the ice maker’s
data plate before connecting the unit.

E.

WATER SUPPLY AND DRAIN
CONNECTIONS

General

When choosing the water supply for the ice flaker
consideration should be given to:

a) Length of run

b) Water clarity and purity

c) Adequate water supply pressure