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5
Installing a Jumper
If installing a multi plate system, use the jumper to connect the remaining tube on the
first plate to either tube on the second plate.
Installing the Return Line
Connect a return line to the remaining tube. This return line connects to the
compressor.
Support the tubing every 18 inches as necessary with mountable tie wraps and self
taping screws.
THERMOSTAT
Thermostat Location
The thermostat is low voltage and is connected and powered by the transformer in the
compressor cabinet. Mount the thermostat in a convenient location where the sensing
bulb will reach a mounting screw on a plate. It is necessary that the bulb of the sensor
have good thermal contact with the plate. Attach the bulb to the plate using the
stainless clip. Use one of the existing plate mounting screws as an attachment point.
On multiple plate installations, the thermostat must sense the last plate in the
series after the valve. The probe temperature is displayed when 220-volt power is
available. The probe temperature is not the cabinet temperature. The probe
temperature is always colder than the cabinet.
Thermostat Wiring
The Ranco Electronic Temperature Control operates on low voltage (24VAC) supplied
by the transformer in the compressor cabinet.
A 15’ wiring harness is fitted to the thermostat. Use red, blue, and white 16-gauge wire
to extend this harness if a longer length is needed. Attach the wires to the terminal strip
using #8 ring terminals, matching corresponding wire color.