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About enteliZONE Programmable Controllers Product Line
Caution: The surface mount type housing is designed to be mounted on flat
surfaces. If you are mounting the controller onto an electrical box where it is
recessed from the wall surface, tightening the mounting screws may flex the
controller's backplate in towards the electrical box. This could cause
problems with the electrical connection from the on board power and
communication pins to the terminal blocks on the backplate. In this
situation, take care to not overtighten the screws. Also, you can stack nylon
or plastic washers behind the backplate to make it flush/ level and thereby
reduce flexing of the backplate when you tighten the mounting screws.
Warnings and Cautions [All enteliZONE Sensor and Thermostat
Models]
Warning: These controllers are electrostatic-sensitive devices. Proper ESD
protection (ground strap) should be used when installing this product so that
damage to the product does not occur. Equipment damage or loss of data
may occur if these procedures are not followed as specified.
Caution: Installations requiring CE conformance: All wiring for CE rated
products must use a separated extra low voltage (SELV) or protective extra
low voltage (PELV) transformer. Use safety-isolating transformers, (Class II
transformer) per EN61558. The transformer must be rated for 100% duty
cycle.
Caution: You MUST ground this controller properly for reliable operation.
Make sure to ground the controller as close to the unit as possible ideally at
a GND terminal on the unit. Connect to ground with the shortest cable
possible as a longer cable run increases the chance of noise issues.
The controller uses the ground to establish a common reference for
communications and to reject noise that may interfere with the capacitive
touch screen. If the controller is not grounded properly then serious
communications problems may occur.
Important Information
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Page 14 of 126
eZNT-Wi Programmable Wi-Fi Thermostat Application Guide
Edition 1.4
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