Description and Features

MODEL CA8900 Z-Wave®

Digital Thermostat

Installation and User Instructions

The CA8900 is a digital thermostat that can be con- trolled wirelessly with Z-Wave controllers supporting the Thermostat General V2 Device Class. The thermo- stat is compatible with all standard 24 VAC heating and cooling systems, up to two-stage heat, one-stage cool, and two-stage heat pump. The CA8900 operates as a simple thermostat with buttons to set target tem- peratures for heat and cool modes. The Save Energy button adds two more modes for target temperatures to provide a single button set-back mode for easy op- eration. It can easily be retrofitted to existing systems as part of a Z-wave control strategy.

The CA8900 Wireless Thermostat provides two-way communication as part of a Z-Wave®network. When it receives commands from the Central Controller Unit, it sends back confirmation that the command was received and imple-

mented. Each module in a Z-Wave network communi- cates with every other mod- ule, acting as a “repeater” and routing your commands

to their destination by the most reliable pathway. When Z-Wave devices (regardless of manufacturer) are installed throughout the house, signals are au- tomatically routed around obstacles or dead spots, strengthening the network as more devices are added. The Z-Wave icon shows on the lower right of the dis- play panel, indicating that the thermostat is in contact with the controller. If the icon is not present, commu- nication has been lost. If this occurs, all remote HVAC functions are shut off.

•This thermostat can be used with all 24VAC heat- ing and cooling systems. It cannot be used with line voltage systems.

•The CA8900 is digital and your desired heat or cool temperatures can easily be set on the large screen with the TEMP UP (+) and TEMP DOWN (-)buttons on the front.

•A minimum 4-minute off time protects heating and cooling systems from damage.

•This thermostat uses a new technique called sequen- tial staging for more comfort with faster reaction to requested temperature changes.

NOTE: When using a heat pump with auxiliary heat, if the heat pump cannot keep up and/or is defective, remove jumper from position 2B and put jumper on position 2A. This will make the auxiliary heat your only source of heat. Be sure to restore it to PUMP when the pump is again operational, as auxiliary heat is more expensive than pump heat. For more information, see page 3.

This guide is in two parts:

•Part One: Operating Guide — for the homeowner or end user.

•Part Two Installing Guide — for the installer or technician.