Bradford White S-2-TW75T6BN User Manual

Page 3

SENSOR WIRES FOR SOLAR THERMISTOR CONNECTIONS – Twisted wires are provided under the
lower and upper covers. These wires have been provided as a means for connecting thermistors to a solar
controller. NOTICE: Neither the solar controller nor the thermistors are provided with the solar water
heater and must be purchased separately. The lower thermistor wires connect a thermistor for use in
comparison to the solar collector temperature to determine if an appropriate temperature difference for heat
transfer is available. A bracket to fix the thermistor against the tank wall is supplied. The upper thermistor
wires are an optional second thermistor connection to monitor the upper tank temperature. Some solar
controllers provide this option.

Figure 4 – Wiring and Placement for the Solar Control Temperature Sensor

BROWN WIRE

THERMISTOR

(NOT INCLUDED)

BRACKET

WIRE NUTS

COVER
OPENING

SENSOR PLATE

ORANGE WIRE