For The Plumber - Scotsman ND650 Service Manual

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.
Drains
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.
CONFORM TO ALL APPLICABLE CODES
WATER INLET
CABINET
DRAIN
OPTIONAL
WATER
FILTER
WATER INLET
SHUT OFF
VALVE
VENTED
DRAIN TUBE
WATER COOLED DETAIL
CONDENSER
WATER INLET
POTABLE
WATER INLET
March, 1989
Page 7
ND650
FLOOR DRAIN
CONDENSER
DRAIN
CABINET
DRAIN