How To Connect Tank Thermistor Cable To Heat Pump Unit - Sanden GS3-45HPA-US Installation Manual

How to connect Tank thermistor cable to Heat Pump unit


The thermistor cable and conduit length are provided to cover 16.5 feet between the
tank and the Heat Pump.

If the units are located closer, the thermistor cable and conduit may be cut to the
desired length (Figure 8).

If the units are further apart, the thermistor cable may be extended by connecting an
18-2 AWG Shielded wire to the existing thermistor cable – connections are not
polarity sensitive.

Attach the conduit connector to the conduit end. Push the conduit into the opening on
the connector until the conduit does not go any further. Pull the conduit several times
to ensure the connector is fixed properly to the conduit.

Unscrew and carefully remove the terminal block cover on the tank. Do not use
unnecessary force to remove the cover as this could pull and break the cable coming
out of the tank unit.

Attach the connector on the end of the thermistor conduit coming from the heat pump
unit side to the opening on the bottom of the cover on the tank unit.
Confirm the gasket is adhered to the thread of the conduit connector before attaching
the connector to the cover. If the gasket is not present, there is a risk of water getting
inside the cover and this may result in a malfunction of the terminal block.

Connect the thermistor cables to the bottom of the terminal block.
Replace the terminal block cover back onto the tank unit and tighten the screws.
Sanden Heat Pump – Installation Manual
Page 12 of 36