For The Plumber - Scotsman ND750 Service Manual

ND750

FOR THE PLUMBER

CONFORM TO ALL APPLICABLE CODES
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.
INLET WATER
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.
Drains
Air Cooled Models: There is one 3/4" FPT drain
WATER COOLED
VENTED
CONDENSER
DRAIN
WATER INLET
OPTIONAL
WATER
FILTER
CONDENSER
SHUT OFF VALVE
DRAIN
at the back of the cabinet, the drain line is of the
gravity type, and 1/4 inch per foot fall is an
FLOOR DRAIN
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.
January, 1989
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