TK 56430-18-IP-EN
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On box trucks, the drain hose should not be run behind the cab as they
will not be serviceable. Drain hose should always be run to the
outside.
Drain hoses must be routed out of the cargo area and exit under the
vehicle.
Drain Heater Standards
Evaporators that operate in below freezing cargo temperatures are equipped with drain heaters. These heaters
(resistance wires) are inserted into the drain hoses (by installer) and get warm enough to keep the condensate in the
drain hoses from freezing.
All MAX (R404A/R-452A) system evaporators are equipped with drain heaters. They are also available as an option on
Non-MAX (R-134a) systems.
Spectrum Models, when heater wires are installed in fresh compartments, the supplied fuse must be installed.
Heater Resistance Wires
Heater wires must extended into drain pan and be inserted into each drain hose as far as they will go.
•
NEVER CUT HEATER RESISTANCE WIRES!
•
DO NOT install more than one heater wire into each drain tube.
•
DO NOT use band wraps to hold heater wires.
•
DO NOT cover or wrap heater wires.
•
DO NOT pinch the end of the heater wires tight.
