4 Smart Home Monitoring | Zen Thermostat | Manufacturer's Installation Guide | Installation Tips and Tricks
Removing the existing thermostat
main display
Most thermostats allow you to remove the main unit
and provide access to a wall plate which holds the
wiring terminals.
Removing the existing thermostat diers between models. It usually requires:
›Snapping it o the wall with moderate pressure
›Undoing small screws
›Lifting locking tab and rotating the thermostat
If you are unable to pull it o, please refer to your thermostat manufacturer's website
or manual for removal instructions.
Some old thermostats contain mercury in a sealed tube. Contact the
Thermostat Recycling Corporation at www.thermostat-recycle.org/
for information on how and where to properly and safely dispose
of your old thermostat.
Wire Labelling
There is no single standard for wire colours and thermostat connections. However, most
thermostats have terminal blocks with wire labels. The way in which the old thermostat is
wired and labelled is one of the best guides for how to wire up the ZEN thermostat.
Correctly identifying the wires that exist ensures that all the functions of your heating and
cooling system will be able to be controlled by the ZEN thermostat.
If you are unsure or your wire terminals are unlabelled, tracing
the wires back to the HVAC system is the best way to determine
what each wire does.
ZEN provides wire labels in the package, which should be
used to label the wire before they are removed from the old
thermostat terminals.
The ZEN online installation guide provides a detailed description
of which label should be applied to which wire. Once the old
thermostat is removed, the best way of identifying wires is
through the ZEN labels. The wiring diagrams provided by ZEN
are all based on the ZEN labelling format
