Heat Controller Water Source Heat Pump manual Conductors 18 Ga. Min

Section 2 WattMaster WHP

Warning: Polarity is very important when connecting power to the controllers! The grounded side of the control transformer must be connected to the terminal labeled GND on the controller. If a single transformer is used to power more than one controller you must connect GND-to- GND and 24VAC-to-24VAC on each controller. Failure to observe polarity will result in damage to one or more components in your system.

The WHP Loop Controller requires the following electrical connections:

-24VAC Supply Voltage		2 Conductors (18 Ga. Min.)
-Communications Loop	2 Conductor twisted pair with shield (18 Ga. Minimum)
	(Belden #82760, WattMaster Cable or equivalent)
-Supply Water Temperature Sensor		................................... (24 ga. Min.) 2 Conductors
-Return Water Temperature Sensor		(24 ga. Min.) 2 Conductors
-Outside Air Temperature Sensor		(24 ga. Min.) 2 Conductors
-Loop Pressure Sensor (Optional)		(24 ga. Min) 2 Conductors
-Fire/Smoke Alarm Contacts		(24 ga. Min.) 2 Conductors
-Loop Pressure Switch		(24 ga. Min) 2 Conductors
-Manual Reset Switch		(24 ga. Min) 2 Conductors
-Request to Run Contacts		(24 ga. Min) 2 Conductors
-Analog Outputs		(24 ga. Min) 2 Conductors
-Binary Outputs		(24 ga. Min) 2 Conductors

Tip: After making all electrical connections it is advised to unplug all terminal blocks on the WHP Loop Controller until you are ready to begin the checkout procedure. This may help to prevent damage if wiring errors occur elsewhere in the system during installation or start-up.

2-8 Installation and Wiring