Lochinvar SQUIRE SIT119 User Manual download pdf (Page 15)

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

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. 4-1). 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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