WattMaster Water Source Heat Pump, Installation & Operation Manual

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WattMaster WHP Section 2
Installation and Wiring 2-19
Room Sensors
The room sensor uses a patented flush mount design to isolate the temperature sensing
element from the housing which mounts flush with the wall surface.
Room sensors should be located on an inside wall away from direct sunlight or heat
producing equipment such as computers, copiers, etc. Such devices can adversely affect
the accuracy of the sensor.
Although the sensor eliminates most of the effects of thermal coupling to the walls, try to
avoid walls which retain large amounts of thermal energy (such as marble or steel). Walls
containing either cold or warm air currents should also be avoided whenever possible.
Avoid locating the sensor in dead air areas of a room. This will result in slow response to
temperature changes in the space.
Mount the sensor approximately 50-60 inches from the floor for best results.
The room sensor is designed to mounted vertically in a standard 2 by 4 inch electrical
box. The sensor may be mounted directly into the drywall where electrical codes do not
require low voltage wiring to be enclosed in conduit. See enclosed sheet for dimensional
and installation data.
Tip:
Be careful when cutting the hole for the sensor or the plastic bezel of the sensor
may not completely cover the opening.
GND
AUX
TMP
OVR
R
E
L
O
C
R
E
M
R
O
A
W
12V
AIN
1
2
3
4
5
GND
GND
AOUT
AIN
AIN
AIN
AIN
PRESSURE
SENSOR
YS
ADJUSTABLE
SETPOINT
OVERRIDE
ROOM SENSOR WITH OVERRIDE
AND ADJUSTABLE SETPOINT
WHP CONTROLLER
ONLY REQUIRED WHEN
USING ADJUSTABLE
SETPOINT
Figure 2-14: Room Sensor Wiring