Heat Controller Water Source Heat Pump - Manual (Page 46)

Section 2 WattMaster WHP
2-22 Installation and Wiring
Leaving Water
Temperature Sensors
The leaving water temperature sensor (optional) when used should be located on the
leaving water piping close to the water source heat pump unit. Either a thermowell type or
a surface mount sensor may be used depending on job requirements.
1/8-27 NPSM Internal Thread 1/8-27 NPT External Thread
1/2" NPT External Thread
3.25
0.5
5.13
5.50
4.94
OE291 Stainless Steel Thermowell
OE230 Duct Sensor
Leads Are Non-polarized.
Butt Splice Leads To 24 Gauge
Wire Minimum. Connect Leads
To "Analog In" And "Ground"
At Controller.
The OE230 Duct Sensor Threads Into The OE291 Stainless
Steel Thermowell. The OE291 Thermowell Threads Into A 1/2”
FPT Elbow or Tee in the Water Piping of the Water Coil
Where You Wish to Measure the Water Temperature. The
Pipe must be a minimum of 4” Diameter or an Extended Tee
and Bushing Configuration Must be Used to Accommodate the
Length of the Thermowell Assembly.
Figure 2-17: Water Temperature Sensor
Figure 2-18: Water Temperature Sensor
Wire Tire
(Supplied)
Sensing Element
(Supplied)
Thermal Mastic Strip
(Supplied)
Supply Or Return
Water Pipe.