© 2016 HBX Controls
16
INSTALLATION AND WIRING
m
ounting
i
nstructions
In order to assure proper room temperature, it is important to identify the ideal
location of the thermostat. It should be approximately 5 feet from the floor
and at least 1 foot from door openings on an interior wall. Avoid exposing the
thermostat to direct sunlight, to air flows (doors, windows, etc.) as well as to heat
sources.
e
xternal
r
oom
t
hermistor
INTERNAL ROOM
EXTERNAL ROOM
On the THM-0500, the room
thermistor switch is located on the
bottom left corner of the
thermostat.
Toggling this switch will allow the
user to alternate between the
built in room thermistor on the
THM-0500, or an external room
thermistor connected to pins 1 and
2 on the THM-0500.
1 2 3
4 5 6
1 - 2:
External Room Sensor
3 - 4:
External Thermistor
5 - 6:
Communication
& Power from
ZON-0550
Use a screwdriver to gently
pop the front cover off from
the top of the thermostat,
and then remove the front to
expose wiring terminals.
Do not use the screwdriver on
the bottom of the thermostat.
This can cause damage to the
THM-0500