Aprilaire 8800 User guide

HVAC Automation

Model 8800 Communicating Thermostat

System Installation Manual

READ AND SAVE THESE INSTRUCTIONS

COMMUNICATING THERMOSTAT SYSTEM INSTALLATION MANUAL

WARNING

1. 120 volts may cause serious injury from electrical shock. Disconnect electrical power to the HVAC system before starting

installation. This system is a low-voltage system.

2. Improper installation may cause serious injury from electrical shock. This system must be installed by a qualiﬁed contractor in

accordance with NEC Standards and applicable local and state codes.

This manual will guide the installer through the installation, wiring and checkout of an Aprilaire®Model 8800 Communicating Thermostat

System. For a complete command set with programming suggestions, see the programming manual (Part No. 10009414). Please visit

www.aprilairepartners.com/docs/literature for this document.

Collect the components needed ............................................................................................ 3

Disconnect power to all HVAC equipment and/or zone control panels ............................................................. 4

Run the required wires and mount the system components...................................................................... 5

Connect the control wires to the HVAC/zone system and thermostats ............................................................. 7

Connect the communication and power wires to the distribution panel and thermostat ............................................... 8

Connect multiple distribution panels ........................................................................................ 9

Connect protocol adapter to the distribution panel and host computer or automation system ......................................... 10

Powering up the distribution panel and thermostats........................................................................... 11

Check-out HVAC system operation......................................................................................... 11

Set thermostat address and total number of thermostats ...................................................................... 11

Setup computer for communication system checkout .......................................................................... 12

Check-out communications to the thermostat network......................................................................... 15

Appendix 1 – Special considerations for installing the Model 8800 with the 8870 Series Communicating Thermostat ..................... 16

Appendix 2 – Sensor averaging ........................................................................................... 17

Appendix 3 – Model 8022: 4 wire thermostat to 3 wire cable interface ........................................................... 18

TABLE OF CONTENTS

COLLECT THE COMPONENTS NEEDED

• Small flat head screwdriver for terminal screws (1/8” wide tip).

• Medium size flat/phillips head screwdriver for component mounting

screws.

• Volt/ohm meter.

• Computer with available com port (RS-232) and terminal emulator

such as HyperTerminal (for system checkout).

• Wire strippers.

• Small level (use to mount components level, required for

appearance only).

TOOLS NEEDED

• Multi-conductor thermostat cable (18 –20 gauge).

• Category 5 communication wire (4 pair twisted cable).

WIRE NEEDED

Model 8800

Communicating Thermostat

The Model 8800 thermostat is an

RS-485 communicating thermostat,

configurable for single and multi-stage

heat/cool or heat pump systems. It is

also configurable as a whole home

humidifier/dehumidifier control.

SYSTEM COMPONENTS

Model 8819 Distribution Panel

The distribution panel is a switch controlled

communication bus that can be wired to

eight Model 8800 thermostats. This allows

thermostat communication to be turned on

and off at one convenient location which

simplifies installation and troubleshooting.

Model 8811 Protocol Adapter

The 8811 protocol adapter is used to

convert an RS-485 communication signal

to an RS-232 signal that is readable by a

host computer’s serial port.

Automation System Controller

RS-232 or RS-485 based automation system

controller such as the Aprilaire System

Controller.

RS-232

POWER

RXD

TXD

RS-485/422

DC +9V

MODEL 8081 AND 8082 SUPPORT MODULES (OPTIONAL)

Support modules can be added if you require additional temperature or humidity values. Support modules can also be used for sensor averaging

in large areas.

Model 8081 Support Module

Provides two temperature values.

• One onboard or remote temperature sensor.

• One remote temperature sensor.

Model 8082 Support Module

Provides one temperature and one humidity

value.

• One onboard humidity sensor.

• One onboard or remote temperature sensor.

WARNING

Use only the correct support module with each thermostat. Damage will occur if they are mixed.

8800s use only 8081 & 8082 support modules. 8870s use only 8061 & 8062 support modules.

• Use Category-5 cable for all communication wiring.

• Check and recheck to ensure connection to the proper terminals before powering up the thermostats. Use wire color as a guide and be consistent.

• Use a Distribution Panel on all systems with more than one zone to simplify wiring and troubleshooting.

FOR EASE OF INSTALLATION AND TROUBLESHOOTING DO THE FOLLOWING:

DISCONNECT POWER TO ALL HVAC EQUIPMENT AND/OR ZONE CONTROL PANELS

• If the thermostats are wired to a zone control panel, there is generally one set of input terminals supplying power to the thermostats and

dampers. This must be disconnected.

• If the thermostats are wired directly to HVAC equipment, the power must be shut off at the equipment. This can generally be accomplished by

turning off the disconnect switch located near the equipment. If an obvious disconnect switch is unavailable, you will need to turn the circuit

off using the fuse or circuit breaker. Remove the fuse or shut down the circuit breaker serving the equipment.

CAUTION

Failure to disconnect power could result in damage to the HVAC equipment or thermostats. Leave power disconnected until all other

electrical connections have been made and checked for accuracy.

MODEL 8051, 8052 AND 8053 REMOTE TEMPERATURE SENSORS (OPTIONAL)

These sensors can be used directly with the Model 8800 thermostat or with support modules.

Model 8051 Flush Mount Sensor Model 8052 Outdoor Temperature Sensor Model 8053 Wall Mount Sensor

RS-232

POWER

RXD

TXD

RS-485/422

DC +9V

24VAC

Automation

System

Protocol Adapter

(if needed)

Distribution Panel

Communicating Thermostat

Communicating Humidistat

Support Module

Model 8051

Flush Mount Sensor

Zone Dampers

Zone Comfort Control Panel HVAC System

Straight through serial cable

provided with Protocol Adapter

Thermostat cable

Category 5 (4 pair twisted)

communication wire

24 VAC

from HVAC equipment,

thermostat, or plug-in transformer

HVAC UnitModel 8051

Flush Mount Sensor

Model 8052

Outdoor Temperature Sensor

Support Module

FIGURE 1 – Run Wire for System

RUN THE REQUIRED WIRES AND MOUNT THE SYSTEM COMPONENTS

1. Determine component locations.

2. Run and label wires. Use FIGURE 1 for selecting wire type.

3. Mount components as specified in each product’s installation instructions.

Maximum Wiring Distances

From To Maximum Distance

Automation or Computer System Protocol Adapter 3 ft. Cable Provided with Protocol Adapter

Protocol Adapter Thermostat (this includes going through the Distribution Panel) 4000 ft. (cumulative)

Thermostat Support Module 1000 ft. (cumulative)

Support Module Temperature Sensor Option 300 ft.

Thermostat Temperature Sensor Option 300 ft.

TO DISTRIBUTION PANEL

CAT- 5

WIRE

CAT- 5

WIRE

CAT- 5

WIRE

CAT- 5

WIRE

CAT- 5

WIRE

CAT- 5

WIRE

CAT- 5

WIRE

CAT- 5

WIRE

CAT- 5

WIRE

Fill Out and Leave with System Software Package

JOB TITLE:

JOB LOCATION:

DATE:

INSTALLING

CONTRACTOR:

DISTRIBUTION PANEL LOCATION / NAME ADDRESS

LOCATION

ADDRESS

LOCATION

ADDRESS

LOCATION

ADDRESS

LOCATION

ADDRESS

LOCATION

ADDRESS

LOCATION

ADDRESS

LOCATION

ADDRESS

LOCATION

FIGURE 2 – Network Interconnection Worksheet

CONNECT THE CONTROL WIRES TO THE HVAC/ZONE SYSTEM AND THERMOSTATS

A qualified HVAC technician should perform

this step to ensure proper termination.

1. Make sure the HVAC system power is off.

2. The Thermostat Installation Instructions

show wiring diagrams for several different

HVAC equipment types. Use FIGURES

3-5 as a reference only. Use color coding

where possible.

Refer to the thermostat installation manual

for check-out procedure and other wiring

details

DO NOT TURN ON THE HVAC

SYSTEM POWER YET!

JUMPER

OUTDOOR TEMP

SENSOR

1st HEATING

1st COOLING

FAN

2nd HEATING

2nd COOLING

NOT USED

TRANSFORMER

REMOTE TEMP

SENSOR

NOT USED

GY2YOB WRC R W2 S2LC S1T1T2A-B-A+B+

RSBRSA

COMMUNICATION

TERMINALS

SUPPORT

MODULE

FIGURE 3 – Conventional Heat/Cool

SINGLE TRANSFORMER

(USE JUMPER WIRE)

2nd COMPRESSOR

2nd AUX HEATING

FAN

1st COMPRESSOR

1st AUX HEATING

OUTDOOR TEMP

SENSOR

JUMPER

FAULT DETECT

REVERSING VALVE

HEAT PUMP

TRANSFORMER

REMOTE TEMP

SENSOR

GY2YOB WRC R W2 S2LC S1T1T2A-B-A+B+

RSBRSA

COMMUNICATION

TERMINALS

SUPPORT

MODULE

FIGURE 4 – Heat Pump

SINGLE TRANSFORMER

(USE JUMPER WIRE)

DEHUMIDIFIER

HUMIDIFIER

TRANSFORMER

DRY CONTACT

GY2YOB WRC R W2 S2LC S1T1T2A-B-A+B+

RSBRSA

8024

REMOVE

JUMPER

FOR DRY

CONTACT

HUMIDIFIER

COMMUNICATION

TERMINALS

SUPPORT

MODULE

FIGURE 5 – Humidistat

NOTE: “O” is active

in cooling and “B” is

active in heating.

W = Humidifier Control

Remove jumper for dry contact control.

Y = Dehumidifier Control

Use Aprilaire Model 8024 relay card or

equivalent for dry contact control.

Note: If you use a dry contact humidifier

without a dehumidifier, you will have to

provide 24VAC to the RC and Cterminals

in order to power the thermostat.

CONNECT THE COMMUNICATION AND POWER WIRES TO THE DISTRIBUTION PANEL

AND THERMOSTAT

1. MAKE SURE THAT ALL SWITCHES ON THE DISTRIBUTION PANEL ARE OFF!

2. Connect the communication wires. FIGURE 6 shows how each thermostat is to be wired to the distribution panel.

• Use the wire colors shown in FIGURE 6 to help ensure proper, consistent connections.

3. Determine the power source for the distribution panel. Each panel requires 24VAC at 1VA. See FIGURE 6 for options.

ORG/WHT

ORG

BLU

BLU/WHT

B+ B-A-

A+ A- B+ B- A+ A- B+ B- A+ A- B+ B- A+ A- B+ B-

A+

OFF ON

ON OFF

MAIN

PWR

ON OFF

24VAC

FUSE SPARE FUSE

A+A-B+B-A+A-B+B-A+A-B+B-A+A-B+B-

BLU/WHT

ORG/WHT

BLU

ORG

BLU/WHT

ORG/WHT

BLU

ORG

BLU/WHT

ORG/WHT

BLU

ORG

DO NOT

CONNECT

B+ B-A- A+

CAT-5

ORG/WHT

ORG

BLU

BLU/WHT

T2T1

CLS2

RC W

BOYY2 G

RSBRSA

B+ A+ B- A-

ORG/WHT

ORG

BLU

BLU/WHT

24VAC

CAT-5

T2T1

CLS2

RC W

BOYY2 G

RSBRSA

B+ A+ B- A-

ORG/WHT

ORG

BLU

BLU/WHT

24VAC

CAT-5

T2T1

CLS2

RC W

BOYY2 G

RSBRSA

B+ A+ B- A-

ORG/WHT

ORG

BLU

BLU/WHT

24VAC

RSB

RSA

CAT-5

GRN/WHT

GRN

GRN/WHT

GRN

MODEL 8811

RS-485

BREAKOUT

ADAPTER

(PROVIDED)

MODEL 8819

DISTRIBUTION PANEL MODEL

8081 OR 8082

SUPPORT

MODULE

MODEL 8052

OUTDOOR

TEMPERATURE

SENSOR

MODEL 8051

FLUSH MOUNT

SENSOR

MODEL 8051

FLUSH MOUNT

SENSOR

MODEL 8800 THERMOSTAT

HVAC EQUIPMENT

FIGURE 6 – System Communication Wiring

1. 24VAC from any one thermostat.

2. 24VAC from plug-in transformer.

3. 24VAC from HVAC equipment.

CONNECT MULTIPLE DISTRIBUTION PANELS

1. MAKE SURE THAT ALL SWITCHES ON THE DISTRIBUTION PANELS ARE OFF!

2. If more than one Distribution Panel is used in the thermostat network, the communication lines must be daisy-chained together.

• Use the wire colors shown in FIGURE 7 to help ensure proper, consistent connections.

3. Power from the HVAC equipment or plug-in transformer can be used to power multiple distribution panels, but if you are powering the panel

from a thermostat, use one thermostat per panel.

BLU/WHT

BLU

ORG/WHT

ORG

BLU/WHT

BLU

ORG/WHT

ORG

CAT- 5

R CA+ A- B+ B-

OFF ON

ON OFF

PWR

RC A+A-B+B-

B+ B-A-

R CA+ A- B+ B-

A+

OFF ON

ON OFF

PWR

RC A+A-B+B-

CAT- 5

DO NOT

CONNECT

A- A+ B+ B-

ORG/WHT

BLU

BLU/WHT

ORG

B+ B-A-A+

MAIN

PWR

ON OFF

24VAC

GRN/WHT

GRN

HVAC EQUIPMENT

MAIN

PWR

ON OFF

24VAC

TO THERMOSTAT GRN/WHT

GRN

TO THERMOSTAT

FIGURE 7 – Multiple Distribution Panels

CONNECT PROTOCOL ADAPTER TO THE DISTRIBUTION PANEL AND HOST COMPUTER

OR AUTOMATION SYSTEM

1. MAKE SURE THAT ALL SWITCHES ON THE DISTRIBUTION PANEL ARE OFF!

2. Use Category-5 wire to connect the main communication terminals on the Distribution Panel to the “Breakout Adapter” of the protocol adapter

(see FIGURE 8).

3. Connect the RS-232 cable from the protocol adapter to the computer or automation system. A 3 ft. RS-232 cable is provided.

Some computers use 25-pin connectors on serial ports, which requires a DB25 connector. A DB9 connector fits a 9-pin port. DB9 to DB25

transitions are available at most computer retail stores.

4. Power up the Protocol Adapter with the plug-in transformer provided. The “Power” LED on the Protocol Adapter should light up when power is

applied.

RS-232

POWER

RXD

TXD

RS-485/422

DC +9V

A- A+ B+ B-

A+ A- B+ B- REF REF

B- B+ A+ A-

BLU/WHT

BLUE

ORANGE

ORG/WHT

RS-485/422 DC +9V

PIN #1

DO NOT

CONNECT

PIN #123456789

RS-485/422 A-

Tx -

A+

Tx +

B-

Rx-

B+

Rx+GNDNC+9V NC NC

DB9 RS-485 /422 CONNECTOR PIN- OUT

9VDC 500mA

AC PLUG-IN

TRANSFORMER

(PROVIDED)

CAT-5 NETWORK CABLE (NOT PROVIDED)

APRILAIRE MODEL 8819

DISTRIBUTION PANEL

OR MODEL 8800

COMMUNICATING

THERMOSTAT

RS-485/422 BREAKOUT

ADAPTER (PROVIDED)

RS-232 3FT CABLE

(PROVIDED)

STRAIGHT THROUGH

COMPUTER OR AUTOMATION

SYSTEM WITH RS232 SERIAL

COMMUNICATION PORT

(NOT PROVIDED)

FIGURE 8 – Protocol Adapter Wiring

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