For The Plumber - Scotsman NM650 Service Manual

NM650

FOR THE PLUMBER

Water Inlet
Air Cooled Models: The recommended water
supply is clean, cold water. Use 3/8" O.D.
copper tubing, connect to the 3/8" male flare
at the back of the cabinet. Install a hand valve
near the machine to control the water supply.
Water Treatment: In most areas, a water filter
of some type will be useful. In areas where the
water is highly concentrated with minerals the
water should be tested by a water treatment
specialist, and the recommendations of the
specialist regarding filtration and/or treatment
should be followed.
Water Cooled Models: A separate 3/8" O.D.
copper line is recommended, with a separate
hand valve to control it. It is connected to a
3/8" FPT condenser inlet at the back of the
cabinet. The water pressure to all lines must
always be above 20 psig, and below 120 psig.
WATER
COOLED
CONDENSER
INLET
HAND
VALVE
WATER
FILTER
CONFORM TO ALL APPLICABLE CODES
VENTED
CONDENSER
DRAIN DRAIN
Air Cooled Models: There is one 3/4" FPT
drain at the back of the cabinet, the drain line
is of the gravity type, and 1/4 inch per foot fall
is an acceptable pitch for the drain tubing.
There should be a vent at the highest point of
the drain line, and the ideal drain receptacle
would be a trapped and vented floor drain.
Use only 3/4" rigid tubing.
Water Cooled Models: In addition to the
above mentioned drain, a separate condenser
drain must be installed. Connect it to the 1/2"
condenser drain connection at the back of the
cabinet.
Storage Bin: A separate gravity type drain
needs to be run, similar to the air cooled drain.
Insulation of this drain line is recommended.
AIR COOLED
FIELD
SUPPLIED
HAND
FILTER
VALVE
WATER
INLET
January, 1991
Page 6
Drains
MODELS
VENTED
DRAIN