Z-Wave CA8900 Installation And User Instructions Manual

Installation and User Instructions

MODEL CA8900 Z-Wave

®

Digital Thermostat

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. 

Description and Features

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.

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.