Aprilaire 8800 Universal Installation manual

HVAC Automation
Model 8800 Communicating Thermostat
System Installation Manual
READ AND SAVE THESE INSTRUCTIONS
COMMUNICATING THERMOSTAT SYSTEM INSTALLATION MANUAL
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.
TABLE OF CONTENTS
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
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
WARNING
1. 1 20 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.
2
COLLECT THE COMPONENTS NEEDED
Tools neeDED
Wire neeDED
• Small flat head screwdriver for terminal screws (1/8” wide tip).
• Multi-conductor thermostat cable (18–20 gauge).
• Medium size flat/phillips head screwdriver for component mounting
screws.
• Category 5 communication wire (4 pair twisted cable).
• 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).
SYSTEM COMPONENTS
Model 8819 Distribution Panel
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.
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.
RS-485/422
DC +9V
TXD
RXD
POWER
Model 8811 Protocol Adapter
Automation System Controller
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.
RS-232 or RS-485 based automation system
controller such as the Aprilaire System
Controller.
RS-232
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
Model 8082 Support Module
Provides two temperature values.
• One onboard or remote temperature sensor.
• One remote temperature sensor.
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.
3
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
FOR EASE OF INSTALLATION AND TROUBLESHOOTING DO THE FOLLOWING:
• 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.
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.
4
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.
Figure 1 – Run Wire for System
Straight through serial cable
provided with Protocol Adapter
Category 5 (4 pair twisted)
communication wire
Model 8052
Outdoor Temperature Sensor
Humidifier
Communicating Humidistat
Thermostat cable
Zone Dampers
Distribution Panel
Communicating Thermostat
Automation
System
RS-485/422
DC +9V
TXD
RXD
POWER
Zone Comfort Control Panel
HVAC System
RS-232
Protocol Adapter
(if needed)
Support Module
24VAC
C
R
Model 8029
24VAC Plug-in
Transformer
Support Module
Model 8051
Flush Mount Sensor
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.
5
Figure 2 – Network Interconnection Worksheet
Fill Out and Leave with System Software Package
JOB TITLE:
JOB LOCATION:
DATE:
INSTALLING
CONTRACTOR:
CAT-5
WIRE
LOCATION
ADDRESS
DISTRIBUTION PANEL LOCATION / NAME
CAT-5
WIRE
CAT-5
WIRE
LOCATION
ADDRESS
CAT-5
WIRE
LOCATION
ADDRESS
LOCATION
ADDRESS
CAT-5
WIRE
CAT-5
WIRE
LOCATION
ADDRESS
LOCATION
ADDRESS
CAT-5
WIRE
CAT-5
WIRE
CAT-5
WIRE
TO DISTRIBUTION PANEL
LOCATION
ADDRESS
6
LOCATION
ADDRESS
CONNECT THE CONTROL WIRES TO THE HVAC/ZONE SYSTEM AND THERMOSTATS
A qualified HVAC technician should perform
this step to ensure proper termination.
Figure 3 – Conventional Heat /Cool
1.Make sure the HVAC system power is off.
THERMOSTAT IS POWERED
FROM 8819 OR 24VAC
TRANSFORMER
Single transformer
(use Jumper wire)
DO NOT TURN ON THE HVAC
SYSTEM POWER YET!
REMOTE TEMP
SENSOR
OUTDOOR TEMP
SENSOR
1st HEATING
2nd HEATING
JUMPER
FAN
1st COOLING
NOT USED
COMMUNICATION
TERMINALS
NOT USED
Refer to the thermostat installation manual
for check-out procedure and other wiring
details
2nd COOLING
TRANSFORMER
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.
SUPPORT
MODULE
B+ A+ B- A- C B O Y Y2 G RC RH W2 W R S2 S1 T1 T2 RSB RSA
Figure 4 – Heat Pump
OUTDOOR TEMP
SENSOR
1st AUX HEATING
2nd AUX HEATING
HEAT PUMP
TRANSFORMER
JUMPER
FAN
2nd COMPRESSOR
1st COMPRESSOR
COMMUNICATION
TERMINALS
REVERSING VALVE
NOTE: “O” is active
in cooling and “B” is
active in heating.
REMOTE TEMP
SENSOR
THERMOSTAT IS POWERED
FROM 8819 OR 24VAC
TRANSFORMER
Single transformer
(use Jumper wire)
SUPPORT
MODULE
OR
B+ A+ B- A- C B O Y Y2 G RC RH W2 W R S2 S1 T1 T2 RSB RSA
Figure 5 – Humidistat
DRY CONTACT
POWERED CONTACT
B+ A+ B- A- C B O Y Y2 G RC RH W2 W R S2 S1 T1 T2 RSB RSA
COMMUNICATION
TERMINALS
HUMIDIFIER
HUMIDIFIER
TRANSFORMER
DEHUMIDIFIER
SUPPORT
MODULE
DEHUMIDIFIER
TRANSFORMER
COMMUNICATION
TERMINALS
THERMOSTAT IS POWERED
FROM 8819 OR 24VAC
TRANSFORMER
HUMIDIFIER
DEHUMIDIFIER
THERMOSTAT IS POWERED
FROM 8819 OR 24VAC
TRANSFORMER
SUPPORT
MODULE
B+ A+ B- A- C B O Y Y2 G RC RH W2 W R S2 S1 T1 T2 RSB RSA
7
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.Use a Model 8029 24VAC transformer or equivalent to power each distribution panel.
Figure 6 – System Communication Wiring
BLU/WHT
BLU
ORG
A- A+ B+ B-
ORG/WHT
MODEL 8811
RS-485
BREAKOUT
ADAPTER
(PROVIDED)
BLU
BLU/WHT
GRN
GRN
GRN/WHT
GRN/WHT
ORG/WHT
ORG
B+ A+ B- A- C
A
A+ A- B+ B-
BLU/WHT
BLU
RC
MODEL 8819
DISTRIBUTION PANEL
B
O
Y Y2 G RC RH W2 W R S2 S1 T1 T2 RSB RSA
MODEL 8800 THERMOSTAT
CAT-5
BLU/WHT
BLU
ORG
ORG/WHT
CAT-5
DO NOT
CONNECT
T1
A+ A- B+ B- R C
ON OFF
OFF ON
ON OFF
OFF ON
B
B
GRN
BLU/WHT
GRN/WHT
B
O
Y Y2 G RC RH W2 W R S2 S1 T1 T2 RSB RSA
MODEL 8800 THERMOSTAT
BLU
MODEL 8052
OUTDOOR
TEMPERATURE
SENSOR
GRN
GRN/WHT
ORG/WHT
ORG
BLU
GRN
GRN/WHT
CAT-5
BLU/WHT
ORG
ORG/WHT
BLU
BLU/WHT
GRN
GRN/WHT
R
MODEL 8029 24VAC
PLUG-IN TRANSFORMER
8
B+ A+ B- A- C
ORG/WHT
24VAC
C
ORG
BLU
ORG
CAT-5
B- B+ A- A+
C
A
A
R
OFF ON
ON OFF
C
B
B
B- B+ A- A+
OFF ON
ON OFF
GRN
GRN/WHT
R
A+ A- B+ B- R C
A
A
BLU
BLU/WHT
C
B
OFF ON
B- B+ A- A+
ON OFF
MODEL 8051
FLUSH MOUNT
SENSOR
ORG
ORG/WHT
R
B
OFF ON
C
ON OFF
SPARE FUSE
A+ A- B+ B- R C
A
A
ORG/WHT
T4
R
OFF ON
MODEL
8081 OR 8082
SUPPORT
MODULE
T3
BLU/WHT
B
ON OFF
T2
B- B+ A- A+
OFF ON
B
FUSE
A+ A- B+ B- R C
A
ON OFF
RSB
RSA
B
A
C
B+ A+ B- A- C
B
O
Y Y2 G RC RH W2 W R S2 S1 T1 T2 RSB RSA
MODEL 8800 THERMOSTAT
MODEL 8051
FLUSH MOUNT
SENSOR
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 each distribution panel with a separate Model 8029 24VAC transformer or equivalent 40VA 24VAC transformer.
Figure 7 – Multiple Distribution Panels
A- A+ B+ BCAT-5
DO NOT
CONNECT
A
A
A+ A- B+ B-
OFF ON
PWR
C
24VAC
A
ON OFF
OFF ON
B
PWR
B
ON OFF
OFF ON
PWR
B- B+ A- A+
A
C
B
ON OFF
R
PWR
C
OFF ON
B
C
A
ON OFF
A+ A- B+ B- R
A+ A- B+ B- R
A
B
B- B+ A- A+
B
R
A+ A- B+ B-
BLU
BLU/WHT
BLU/WHT
ORG
ORG
ORG/WHT
BLU
ORG/WHT
BLU
BLU/WHT
ORG
ORG/WHT
CAT-5
24VAC
C
R
C
MODEL 8029 24VAC
PLUG-IN TRANSFORMER
R
MODEL 8029 24VAC
PLUG-IN TRANSFORMER
9
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.
Figure 8 – Protocol Adapter Wiring
CAT-5 NETWORK CABLE (NOT PROVIDED)
BLU/WHT
BLUE
ORANGE
ORG/WHT
9VDC 500mA
AC PLUG-IN
TRANSFORMER
(PROVIDED)
DO NOT
CONNECT
B- B+ A+ A-
A-
A+
B+
B-
RS-485/422 BREAKOUT
ADAPTER (PROVIDED)
A+ A- B+ B-
APRILAIRE MODEL 8819
DISTRIBUTION PANEL
OR MODEL 8800
COMMUNICATING
THERMOSTAT
RS-485/422
DC +9V
COMPUTER OR AUTOMATION
SYSTEM WITH RS232 SERIAL
COMMUNICATION PORT
(NOT PROVIDED)
RS-485/422
DC +9V
PIN #1
TXD
RXD
POWER
DB9 RS-485 /422 CONNECTOR PIN-OUT
PIN #
RS-485/422
RS-232
RS-232 3FT CABLE
(PROVIDED)
STRAIGHT THROUGH
10
1
2
3
4
5
6
7
8
9
A- A+ B- B+
GND NC +9V NC NC
Tx- Tx+ Rx- Rx+
CHECK-OUT HVAC SYSTEM OPERATION
Use the thermostat to verify that the equipment is being controlled. A checkout procedure is supplied in the installation instructions with the
thermostat. This procedure will verify only that the thermostat operates the equipment. Communication system checkout will be performed next.
Set thermostat address and total number of thermostats
IMPORTANT!
THESE STEPS MUST BE DONE AT EACH THERMOSTAT FOR COMMUNICATION TO WORK PROPERLY.
1.Enter the thermostat’s Installer Setup Menu.
Press [MODE] to set system to OFF.
Figure 9
Press [MENU] to enter main menu.
P
ress and hold [SETUP] for seven seconds, [INSTALL SETUP]
appears.
SETTING
DESCRIPTION
SETTING
NUMBER
SETTING
OPTIONS
Press [INSTALL SETUP] to enter installer setup menu.
Press [NEXT] or [BACK] to page through the settings.
2.Select System Setting 00 NETWORK ADDRESS.
Press up or down to adjust the setting.
• Numbering should start at 1 and continue sequentially
(64 maximum).
• No two thermostats should have the same address.
3.Select System Setting 01 NUMBER OF NODES and set the total
number of thermostats on the network.
Press up or down to adjust the setting.
• This number must be set the same on all thermostats.
4.(Optional depending on automation equipment) Select System
Setting 02 BAUD RATE and set the communication baud rate.
Default is 9600.
5.Press [DONE] to save and exit, or [CANCEL] to exit without
saving.
The thermostat will discard changes and exit if nothing is pressed
within 60 seconds.
To reset the installer settings to the default, reset the thermostat by
pressing the [RESET] button inside the battery cover.
11
SETUP COMPUTER FOR COMMUNICATION SYSTEM CHECKOUT
REQUIREMENT: HyperTerminal software and a PC with a serial port or usb to serial port adapter.
1.Connect the Protocol Adapter RS-232 output to a computer with Windows ’95, ’98, Windows 2000, Windows NT, or XP.
Note: Newer Windows systems may not include HyperTerminal.
2.From the Start menu, select PROGRAMS ACCESSORIES COMMUNICATION HYPERTERMINAL. HyperTerminal is a terminal
emulator program provided with Windows that will be used to test the communication system.
3.Double click the Hypertrm icon. You will then be asked to name the new connection and select an icon. Type in any name you want (the
shorter the better) and select the “atom-like” symbol at the end of the Icon list (see FIGURE 10). Then click OK.
Figure 10 – New Connection
12
4.This will bring up a Connect to dialog box. From the pull down
next to “Connect using:”, select the Com port to which the Protocol
Adapter is connected (see FIGURE 11). Start with Com port 1 (or
the next lowest available number) if you are unsure which one to
use. Click OK.
Figure 11 – Select Com Port
5.A COM1 Properties dialog box should appear. Use the pull-down
menus or type in the following for each selection (see FIGURE 12):
Bits per second: 9600 (or 19200 if thermostats are configured for
this baud rate)
Data bits: 8
Parity: None
Stop bits: 1
Flow control: none
Click OK.
Figure 12 – Connection Properties
13
6.From the File pull-down menu, select Properties. This will bring
up a Properties dialog box.
Figure 14 – ASCII Setup
7.Select the Settings tab. Make the following selections
(see FIGURE 13):
Terminal keys
Ctrl+H
Emulation: Auto Detect
Telnet terminal: ANSI
Backscroll buffer lines: 500
Figure 13 – Terminal Settings
9.Click OK to put away both dialog boxes.
10.Verify that you have a connection between the computer and
the Protocol Adapter. Have the Protocol Adapter within eyesight
of the computer keyboard. Type any character and confirm that
the “RXD” LEDs on the Protocol Adapter flash as you type (see
FIGURE 8 on page 10). The LEDs flash very quickly.
11.Press Enter to clear the command line.
8.Then select the ASCII Setup button. This will bring up an ASCII
Setup dialog box. Make the following selections (see FIGURE 14):
Echo typed characters locally
Append line feeds to incoming line ends
Wrap lines that exceed terminal width
NOTE:
IF USING AN EXISTING HYPERTERMINAL CONNECTION YOU
MAY NEED TO UNCHECK THE “SEND LINE FEEDS…” BOX.
14
ote: On Windows ’98 computers, HyperTerminal does not echo
N
typed characters (doesn’t show them on the screen as you type)
locally. Do not be concerned. This can be a little confusing, but
does not affect the checkout of the thermostat communication
system.
• If you were unable to verify a connection, specify a
different com port. Go to the File pull down menu, and select
Properties. Change the “Connect using:” setting to a
different port by using the pull down menu options. Start typing
and look for the Protocol Adapter “RXD” or “TXD” LEDs to
flash. Repeat until you have successfully verified connection
between the computer and communication system, or until you
run out of com ports to choose from in the “Connect using:”
pull down. If there is still no communication you are going to
have to consult a computer professional.
CHECK-OUT COMMUNICATIONS TO THE THERMOSTAT NETWORK
This section confirms communications to each thermostat and each thermostats network address.
1.At the distribution panel turn on the communication switches A and B for the thermostat with address#1 (see FIGURE 15).
2.At the Hyperterminal program type: SN ID? and press Enter.
You should see response:
SN1 MODEL# 8800 VER: x.xxx - RPC 2011 (x.xxx represents the current firmware version number)
• If the response is not exactly as shown, there is a communication signal problem. The most likely sources are a loose terminal connection,
incorrect wiring, incorrect wire type, damaged wire, electrical interference or incorrect power supply.
3.Now back at the distribution panel turn on the communication switches A and B for the thermostat with address#2.
4.At the Hyperterminal program type: SN ID? and press Enter.
You should see response from both thermostats:
SN1 MODEL# 8800 VER: x.xxx - RPC 2011
SN2 MODEL# 8800 VER: x.xxx - RPC 2011
5.Repeat this process adding one thermostat each time to verify communications to all thermostats. Each time you turn on the communication
switches and send SN ID? command to a new thermostat, a new “SN” number should respond.
6.Once you have successfully completed this procedure you have verified that proper communication exists between the computer and all of the
thermostats. To test out all of the functions of the thermostat, use the software or automation package being installed with this system.
Figure 15 – Com Switches
A
A+ A- B+ B-
“A” LED flashes when communications
are transmitted by the thermostats
B
ON OFF
A
OFF ON
B
OFF ON
“B” LED flashes when communications
are transmitted by the host computer or
automation system.
R
ON OFF
C
C
A+ A- B+ B- R
A
B- B+ A- A+
B
15
APPENDIX 1 – SPECIAL CONSIDERATIONS FOR INSTALLING THE MODEL 8800 WITH
THE 8870 COMMUNICATING THERMOSTAT
WARNING
When replacing an 8870 Thermostat with the model 8800 Thermostat these additional steps are required
in order for proper operation.
1.The 8800 Thermostat cannot be powered from an 8818 Distribution Panel. The 8800 Thermostat must be powered from a
separate 24VAC transformer.
2.The Model 8800 thermostat must be set to non-programmable mode to be used in a 8870/8818 system.
3.Replace any 8061 TT Support Modules connected to the thermostat with 8081 TT Support Modules, but in cases where a
single flush mount and/or outdoor sensor is used they can be directly connected to the new 8800 Thermostat and the Support
Module can be eliminated.
4.Replace any 8062 TrH Support Modules connected to the thermostat with 8082 TrH Support Modules.
Figure 16
RC
C
RSB
MODEL 8029
24VAC PLUG-IN
TRANSFORMER
RSA
T1
T2
T3
T4
MODEL 8081 OR 8082 SUPPORT MODULE
BLU
GRN
GRN
BLU/WHT
GRN/WHT
GRN/WHT
ORG/WHT
ORG
BLU/WHT
BLU
CAT-5
MODEL 8818 DISTRIBUTION PANEL
B+ A+ B- A- C
A+ A- B+ B-
B
O
Y Y2 G RC RH W2 W R S2 S1 T1 T2 RSB RSA
A
REF
OFF ON
B
ON OFF
PWR
OFF ON
MODEL 8800 THERMOSTAT
B
B
OFF ON
ON OFF
PWR
PWR
C
C
FUSE
A+ A- B+ B- R
A
OFF ON
A+ A- B+ B- R
A
ON OFF
OFF ON
ON OFF
OFF ON
B
B
PWR
MODEL 8061 OR 8062 SUPPORT MODULE
ORG/WHT
BLU
BLU/WHT
DO NOT CONNECT
TO 8800
GRN/WHT
GRN
GRN/WHT
ORG
BRN
ORG/WHT
BRN/WHT
BLU
BLU/WHT
CAT-5
C
GRN
BLU/WHT
GRN/WHT
BLU
ORG/WHT
ORG
24VAC
C
16
R
RSR
RSC
RSB
RSA
T1
T2
T3
T4
ORG
GRN
A
PWR
B- B+ A- A+
C
A
ON OFF
BRN
C
PWR
R
PWR
B
OFF ON
B- B+ A- A+
ON OFF
GRN/WHT
BRN/WHT
R
B
OFF ON
B- B+ A- A+
A
ON OFF
SPARE FUSE
A+ A- B+ B- R
A
GRN
CAT-5
R
C
C
PWR
R
A
ON OFF
B
C
A+ A- B+ B- R
A
B- B+ A- A+
B
C
R
RSR
RSC
RSB
RSA
REF
RC
RH
BB+
AA+
R.V.-Heat (B)
R.V.-Cool (O)
G
HUM W1
DEH Y1
W2
Y2
MODEL 8870 THERMOSTAT
APPENDIX 2 – SENSOR AVERAGING
This is an option for sensor averaging that does not require support modules. This option can only be used with a specific number of sensors
(4 or 9).
Figure 17
MODEL 8800 THERMOSTAT
R
R
B+ A+ B- A- C B O Y Y2 G RC RH W2 W R S2 S1 T1 T2 RSB RSA
W
W
W
R
R
W
R
R W
R
R
W
W
W
S1
S2
S3
S4
2-WIRE
THERMOSTAT CABLE
(R=RED, W=WHITE)
FOUR SENSOR TEMPERATURE AVERAGING – WIRING
T1
WIRING SHOWN USING MODEL 8051 FLUSH MOUNT SENSORS.
SAME WIRING FOR MODEL 8053 SURFACE MOUNT SENSORS.
90-1585
T2
FOUR SENSOR TEMPERATURE AVERAGING – SCHEMATIC
MODEL 8800 THERMOSTAT
R
R
R
W
W
R
W
B+ A+ B- A- C B O Y Y2 G RC RH W2 W R S2 S1 T1 T2 RSB RSA
W
W
R
R
R
W
W
R
W
R
R W
2-WIRE
THERMOSTAT CABLE
(R=RED, W=WHITE)
R
W
R
W
W
R
W
S1
S2
S3
S4
S5
S6
T1
T2
R
W
R
R
W
W
R
R
W
S7
S8
S9
W
NINE SENSOR TEMPERATURE AVERAGING – WIRING
90-1584
WIRING SHOWN USING MODEL 8051 FLUSH MOUNT SENSORS.
SAME WIRING FOR MODEL 8053 SURFACE MOUNT SENSORS.
NINE SENSOR TEMPERATURE AVERAGING – SCHEMATIC
17
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