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Maritime Geothermal Ltd.
12-Feb-00
NORDIC® Thermolec® Plenum Heater Connections
Electrical Connection to a
NORDIC® Heat Pump
1. Connect the proper electrical supply
with a suitable breaker to the main ter-
minal block shown. (“A”at left)
2. Using 2 conductors in a length of 18-4
thermostat wire, Connect “I” and “1” in
the control section of the heat pump’s
electrical box to “I” and “1” terminal
strip in the plenum heater as shown.
3. Using the remaining 2 conductors, con-
nect “F” and “F” in the heat pump’s
electrical box to “F” and “F” in the ple-
num heater.
A
18-4 wire
Thermostat Operation
The NORDIC® heat pump comes sup-
plied with a 2-stage heating / 1-stage cool-
ing auto change-over digital thermostat.
The heat pump is already prewired for
this stat and requires only the connections
mentioned above for full operation.
The thermostat operates the heat pump as
the first stage of heat bringing the electric
backup on only if required. There is a 2°
differential between the first and second
stage of heat. The thermostat automatically
changes between heating and cooling as re-
quired by the building.
