- WattMaster Water Source Heat Pump Operations Manual

Section 2 WattMaster WHP
2-12 Installation and Wiring
Outside Air Temperature
Sensor
The outside air sensor must be located where it will not be affected by direct sun or heat
producing equipment. Mounting under the eve of a roof is often a good choice.
Caution: Complaints of inaccurate outside sensor readings are very common and
can almost always be shown to be the result of poor sensor location.
Note: All temperature sensors supplied with the system utilize the same thermistor
type sensing element. For troubleshooting sensor problems refer to the
TEMPERATURE SENSOR RESISTANCE CHART at the end of Section 4.
Outside Air Temperature Sensor
Closure Plug
Gasketed Cover
Cover
Mounting
Screw - Typ.
Mounting Tab
& Screw - Typ.
0.21" Dia. x 0.73
Lg. Slot - Typ.
4
.
5
0
”
2
.
2
5
”
3.00”
Front View
Side View
Back View
Closure Plug
Sensor Tube
Mounting Tab
& Screws - Typ.
2.70”
1
.
1
3
”
2.30”
3.00”