Table of Contents
Step#1: Preparation ..........................................................................2
Step#2: Applications .........................................................................3
Step#3: Wire Connections ..................................................................4
Step#4: Test Operation & Wiring Diagrams .........................................6
Troubleshooting .............................................................................. 14
Technical Specications ...................................................................16
Follow Installation Instructions carefully. Disconnect 
Power to the Heater/Air Conditioner before removing 
the old thermostat and installing the new thermostat.
IMPORTANT
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1
IMPORTANT: The Fan Coil Series Thermostat Controllers are intended to provide an input 
to equipment under normal operating conditions. Where failure or malfunction of the 
thermostat controller could lead to personal injury or property damage to the controlled 
equipment or other property, additional precautions must be designed into the control 
system. Incorporate and maintain other devices, such as supervisory or alarm systems or 
safety or limit controls, intended to warn or protect against failure or malfunction of the 
thermostat controller.