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APRILAIRE COMMUNICATING THERMOSTAT SYSTEM INSTALLATION MANUAL
A.
GET ALL THE ITEMS You Wn.L NEED
Components you will need... (see Dlustration 1 on page 2)
.
One Aprilaire8 Communicating Thennostat for each zone or single zone HV AC system (see THERMOSTAT
GUIDE below)
.
One Aprilaire Communication Panel per eight (8) thermostats in the system (see COMMUNICATION
PANEL GUIDE below)
.
One ApriIaire Protocol Adapter (part number 8811) per 32 thermostats
.
4 to 8 conductor thermostat cable depending on equipment stages (18
-
20 gauge)
.
Category 5 communication wire (4-pair twisted cable available through Research Products
-
part no. 8026)
.
One 24V AC transfonner, ungrounded (part number 8027)
.
Computer with Windows '95, '98 or Windows NT and Proation Stat*Plus HV AC Automation software or an
RS-232 or RS-485 based automation system.
.
OP1l0NAL: Model 8041 Remote Temperature Sensor, Model 8044 Remote Humidity Sensor, Model 8040
Indoor Temperature Control Sensor, Model 8043 Humidity Control Sensor, Model 8025 Output Card
Tools you will need...
.
Small flat head screwdriver for teInlina1 screws (1/8" wide tip)
.
Medium size flat/phillips head screwdriver for component mounting screws
.
Volt/ohm meter
.
Wire strippers
.
Small level (use to mount components level, required for appearance only)
THERMOSTAT GUIDE
MODEL
8844
8846
8847
8848
DESCRIPTION
Single stage heat, single stage cool
Single stage heat pump with one stage of auxiliary heat
Two stage heat pump with one stage of auxiliary heat
Two stage heat, two stage cool
How they communicate
8840 series thennostats communicate to the Aprilaire Communication Card using a proprietary protocol. This type
of communication should not be transmitted over wire runs longer than 300 ft. The Communication Card
communicates with your computer or automation system. You must have one Communication Card for each
thermostat and it can be located in one of two places. The preferred location is in the Aprilaire Comm~rncation
Panel, the alternate location is in a Model 8809 Communicating Sub-Base which mounts behind the thermostat
One of the functions of the conununication card is to translate the communication signal to RS-485, which can be
transmitted over wire lengths up to 4000 ft. Use a model 8809 Communicating Sub-Base only if the Aprilaire
Thermostat is located farther than 300 ft. from the Communication Panel Alternatively, if multiple thermostats are
located more than 300 feet away, use a separate Communication Panel for the distant thermostats and daisy chain all
Conununication Panels using the RS-485 bus.
COMMUNICATION PANEL GUIDE
The Communication Panel is a switch controlled communication bus that can hold up to eight (8) Aprilaire
Communication Cards. This allows thermostat communication (transmit, receive or both) to be turned on and off at
one convenient location which simplifies installation and trouble shooting.
Model Number Definition: 880X
-
The 'X' represents the number of Communication Cards mounted in the
Communication Panel from zero to eight (8). Order one Communication Panel per eight thermostats.
FOR EASE OF INST ALLA TION AND TROUBLE SHOOTING DO THE FOLLOWING:
Y'" Have Communication Cards mounted in the Communication Panel except if a thermostat is to be located farther
than 300 ft. away, then use a Model 8809 Sub-Base.
Y'" Use a Communication panel on all systems with more than one zone, even ifusing Model 8809 Sub-Bases. The
trouble shooting benefits will outweigh the cost of the Communication panel
@Research Products Corooration 2000
1
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