15
Drain Lines
a. Copper lines must be used for drains. Plastics are not acceptable.
b. Drain lines must exit the freezer or cooler as quickly as possible and must have a pitch of at least 1/8”
inch/foot downward or meet the local code requirements.
c. Drain lines must have individual traps for the cooler and the freezer and the trap cannot be inside the
freezer.
d. Drain line heater should be routed through the back (right side) of the freezer evaporator through the
designated knockout
and wired to “X” and “N” as shown in the diagram.
e. Clip and secure the wire along the back bottom of the evaporator to thel drain line.
f. The drain line heater tape must be wrapped the entire drain line inside the freezer, starting at the
bottom of the evaporator coil. The heater must extend through the wall of the freezer to include the
trap.
g. There should be approximately 2 feet of heater tape per 1 foot of drain line with no overlapping. The
heat tape should be routed in such a way that it does not contact any defrost heateer or pan heater
element.
h. The entire length of drain lines inside both the cooler and the freezer should be wrapped with 3/4” thick
Armaflex-type insulation.
***Refer to section-diagram below for wire hook-up.
DrainLine heater
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