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
1. Install the sensor inside the tank as depicted
in FIG. 5-1.
2. Connect the wire leads to the DHW Tank Sensor
(AUX) connection point on the Knight boiler
connection board (see FIG. 5-1).
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
Figure 5-1 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. 5-1). The
tank sensor has a built-in high temperature limit set at
194°F.
NOTICE
The sensor supplied contains an Auto Reset High Limit (194°F).
3. The Knight boiler will automatically read the sensor
and default the tank temperature setting to 125°F.
4. Adjust the tank setpoint program. Reference the
Knight Installation and Operation Manual for a
detailed explanation of the tank setpoint program.
Connect tank sensor
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 sufficient connection.
3. Attach a wire nut at the point where the two wires have been
twisted together. Twist the wire nut until it fits snugly, or
until it cannot be twisted any more.
4. Wrap the wire nut and the two wires with electrical tape to
secure the connection. Cover any exposed wiring with
electrical
tape.
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