SDT/SET
Installation & Operation Manual
5
Wiring
Indirect Water Heater Sensor Setup (Knight Boiler)
Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and
dangerous operation.
CAUTION
DHW TANK SENSOR / AUTO RESET HIGH LIMIT
(PLACE SENSOR IN TANK BULBWELL & SNAP
CLIP OVER BULBWELL)
TANK BULBWELL
KNIGHT LOW VOLTAGE
TERMINAL STRIP
DHW TANK
SENSOR
OUTDOOR
INDIRECT TANK
KNIGHT BOILER
SOLAR SENSOR
(FIELD SUPPLIED)
Figure 5-3 Indirect Water Heater Controlled Using Tank Sensor
Install tank sensor
The tank sensor is a dual sensor which controls the
temperature of the tank from the boiler(see FIG. 5-3). The
tank sensor has a built-in high temperature limit set at
194°F.
NOTICE
The supplied sensor contains an Auto Reset High Limit (194°F).
Connect tank sensor
18
1. Install the tank sensor inside the tank as depicted in
FIG. 5-3.
2. Connect the wire leads to the DHW tank sensor (AUX)
connection point on the Knight boiler connection
board (see FIG. 5-3).
3. The Knight boiler will automatically read the sensor
and default the tank temperature settings to 125°F.
4. Adjust the tank set point program. Reference the Knight
Installation and Operation manual for a detailed
explanation of the tank set point program.
1. Turn OFF the power to the unit. Use wire strippers to strip
one inch of insulation from the ends of each wire that will
be spliced.
2. Splice the two ends of bare wire by twisting them together
with a pair of electrical pliers. Turn the pliers three or four
times to make a suffi cient connection.
3. Attach a wire nut at the point where the two wires have
been twisted together. Twist the wire nut until it fi ts snugly
or until it can no longer be twisted.
4. Wrap the wire nut and the two wires with electrical tape
to secure the connection. Cover any exposed wiring with
electrical tape.
