Page 2 - Appendix 1
This manual will guide the installer through the installation, wiring and checkout of an Aprilaire Model 8870 CommunicatingThermostat System. Instructions for the Aprilaire 8840 Series communicating thermostat system are found in a separatedocument (DP 10004345). A portion of the command set is foun...
Page 3 - ILLUSTRATION 1 – System Components; COMPONENTS YOU WILL NEED...; GET ALL THE COMPONENTS YOU WILL NEED; TOOLS YOU WILL NEED...
ILLUSTRATION 1 – System Components Model 8870 Thermostat RS-422 Communicating Thermostat controls single or multi-stage heat/cool or heat pump HVAC systems. Model 8811 Protocol Adapter Use to convert RS-485 communication signal from Aprilaire Communication System to RS-232 communication signal reada...
Page 4 - MODEL 8818 DISTRIBUTION PANEL; Use Category-5 cable for all communication wiring.; DISCONNECT POWER TO ALL HVAC EQUIPMENT AND/OR ZONE CONTROL PANELS
2 MODEL 8870 THERMOSTAT The Model 8870 Thermostat is field configurable to operatesingle and multi-stage separate heating and coolingequipment (such as furnace and air conditioner or roof topunits), or single and multi-stage heat pump systems. A menudriven set up, using the message center display of...
Page 5 - ILLUSTRATION 2 – Run Wire For System; RUN THE REQUIRED WIRES
CATEGORY 5 (4-PAIR TWISTED)COMMUNICATION WIRE INSTALLATION TIP: USE APIECE OF TAPE TOIDENTIFY WHICHTHERMOSTAT EACH CABLEIS RUN TO ZONE DAMPERS 2-WIRETHERMOSTATCABLE MODEL 8027 PLUG-IN TRANSFORMER (FOR COMMUNICATION SYSTEM) 2-WIRE THERMOSTAT CABLE SEE ZONE CONTROL SYSTEM INSTALLATION LITERATURE FOR C...
Page 6 - LOCATE AND MOUNT THE AUTOMATION SYSTEM COMPONENTS
4 1. Thermostats and sensors are to be located according installation instructions provided with the units. The thermostat has four configuration dip switches on thecircuit board that must be set according to the equipmentthe thermostat will be controlling. Sensors have sixconfiguration dip switches...
Page 7 - Fill Out and Leave with System Software Package; ILLUSTRATION 3 – Network Interconnection Worksheet
JOB TITLE: JOB LOCA TION: D A TE: INST ALLING CONTRA CT OR: ADDRESS LOCA TION ADDRESS LOCA TION ADDRESS LOCA TION ADDRESS LOCA TION ADDRESS LOCA TION ADDRESS LOCA TION ADDRESS LOCA TION ADDRESS LOCA TION DISTRIB UTION P ANEL LOCA TION / NAME DISTRIBUTION P A NEL T O DISTRIB UTION P ANEL CA T -5 WIRE...
Page 8 - DO NOT TURN ON; CONNECT THE CONTROL WIRES TO THE HVAC/ZONE SYSTEM AND THERMOSTATS; DIAGRAM 2 – Typical Heat Pump Wiring Schematic
6 A qualified HVAC technicianshould perform this step toensure proper termination. 1. Make sure the HVAC system power is off. 2. The Thermostat Installation Instructionsshow wiring diagrams forseveral different HVACequipment types. Use DIAGRAMS 1 & 2 as a reference only. Use colorcoding where po...
Page 9 - COMMUNICATION SYSTEM WIRING; detail for each wiring step.; DIAGRAM 3 – System Communication Wiring
RC RH G W2 C RSC RSA RSB RSR R REF Y2 B- B+ A- BLU/WHT ORG/WHT BLU GRN ORG BRN BRN GRN BLU/WHT ORG/WHT BLU ORG BRN GRN BLU/WHT ORG/WHT BLU ORG BRN GRN BLU/WHT ORG/WHT BLU ORG RC RH G W2 C RSC RSA RSB RSR R REF Y2 B- B+ A- BLU/WHT ORG/WHT BLU GRN ORG BRN RC RH G W2 C RSC RSA RSB RSR R REF Y2 B- B+ A-...
Page 10 - COMMUNICATION TERMINAL DEFINITIONS; Connect the REF terminals if:; MAKE SURE THAT ALL SWITCHES IN THE DISTRIBUTION PANEL ARE OFF!; shows how each thermostat is to be wired to the distribution panel.; DIAGRAM 4; to help ensure proper, consistent connections.; DIAGRAM 4 – Thermostat Communication Wiring
RC RH G W2 C RSC RSA RSB RSR R REF Y2 B- B+ A+ A- BLU/WHT ORG/WHT BLU GRN ORG BRN BRN GRN BLU/WHT ORG/WHT BLU ORG B+ B - R E F A- RC A+ A- B+ B- A+ A - A B A+ OFF ON OFF ON OFF ON ON OFF ON OFF ON OFF PWR PWR A A B A A B R CA + A- B+ B- A+ A- COMMUNICATION TERMINAL DEFINITIONS B+/B- RECEIVE (referen...
Page 11 - AND; CONNECT THE; DISTRIBUTION PANEL #1; • Use the wire colors shown in; DIAGRAM 5; DIAGRAM 5 – Multiple Distribution Panels; CONNECT MULTIPLE DISTRIBUTION PANELS
ORG/WHT BLU/WHT RED/WHT BLK/WHT ORG/WHT BLU ORG BLU/WHT CA T -5 ORG/WHT BLU BLU/WHT ORG BLU/WHT BLU ORG/WHT ORG GRN/WHT BLU/WHT BLU ORG/WHT ORG GRN/WHT CAT-5 WHEN CONNECTING MULTIPLE DISTRIBUTION PANELS,CONNECT THE "REF" TERMINALS FOR EACHTHERMOSTAT TO THE "REF" TERMINAL OF THERESPEC...
Page 12 - PROTOCOL ADAPTER PIN-OUTS; WIRE COLOR; SIGNAL; NOT USED; DISTRIBUTION PANEL; protocol adapter (see; DIAGRAM 6; the “Enable” LEDs should light up when power is applied.; DIAGRAM 6 – Protocol Adapter Wiring
10 ORG/WHT BLU/WHT RED/WHT BLK/WHT ORG/WHT ORG BLU BLU/WHT ORG BLU/WHT CAT-5 ORG/WHT BLU PROTOCOL ADAPTER PIN-OUTS RS-485 CONNECTIONS WIRE COLOR FL YING LEADS BLK/WHT RED/WHT ORG/WHT BLU/WHT SIGNAL Rx+ Tx+ Rx- Tx- RS-485 CONNECT ORS 1 23 4 5 6 RS-232 CONNECT OR 1 - CTS: Clear to Send (Outgoing - pul...
Page 13 - of the Distribution Panel (see; DIAGRAM 3; NO LEDs ON THE DISTRIBUTION PANEL SHOULD BE ON.; ILLUSTRATION 4; PROVIDE POWER TO THE DISTRIBUTION PANEL; the “PWR” switch is; ILLUSTRATION 4 – Power Switches
11 1. MAKE SURE THAT ALL SWITCHES IN THE DISTRIBUTION PANEL ARE OFF! 2. Use a 2-wire thermostat cable to connect the load terminals of the Model 8027 Plug-in Transformer to the 24V AC terminals of the Distribution Panel (see DIAGRAM 3 ). 3. Plug-in the transformer. 4. NO LEDs ON THE DISTRIBUTION PAN...
Page 14 - ADDRESS THE THERMOSTATS AND SET HIGHEST ADDRESS; ILLUSTRATION 5 – Setting the Thermostat Address
12 IMPORTANT! THESE STEPS MUST BE DONE AT EACH THERMOSTAT FOR COMMUNICATION TO WORK PROPERLY. 1. Press the Mode and Enter buttons simultaneously through the thermostat. It may take a couple of tries toget them pressed together. This will enter the Thermostat Set Up Menu. The firstmenu item that will...
Page 15 - SETUP COMPUTER FOR COMMUNICATION SYSTEM CHECKOUT; ILLUSTRATION 6 – Access HyperTerminal
1. Connect the Protocol Adapter RS-232 output to a computer with Windows ’95, ’98, Windows 2000 or Windows NT.This may already have been done in Step 7 . 2. Turn on the computer. 3. From the Start menu, select PROGRAMS ➾ ACCESSORIES ➾ COMMUNICATION ➾ HYPERTERMINAL (see ILLUSTRATION 6 ). HyperTermina...
Page 16 - ILLUSTRATION 8 – Select Com Port
6. This will bring up a Connect to dialog box. From the pull down next to “Connect using:”, select the Com port towhich the Protocol Adapter is connected (see ILLUSTRATION 8 ). Start with Com port 1 (or the next lowest available number) if you are unsure which one touse. Click OK . 7. A COM1 Propert...
Page 18 - “B” LED flashes when; CHECK-OUT COMMUNICATIONS TO THE THERMOSTAT NETWORK; ILLUSTRATION 12 – Com Switches
B+ B - R E F A- RC A+ A- B+ B- A B A+ OFF ON OFF ON ON OFF ON OFF PWR PWR A B A B R CA + A- B+ B- “A” LED flashes whencommunications aretransmitted “B” LED flashes when communications are received 1. At the computer type SN? (it does not matter if it is small or capital letters) then press Enter. Yo...
Page 19 - DIAGRAM 7; DIAGRAM 7 – Adding an 8870 Thermostat
ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF OR BL BK RD 2/ YB B4 B8 24V 24Vc Communication Card POWER 24V AC 485 SERIAL IN OR BL BK RD Y2 W1 24V(c) 24V R G Y1 W2 CLK1 RS1 1 RS+v RS2 CLK2 2 Model 8027 PLUG-IN TRANSFORMER 8800-8808 MODEL COMMUNICATION PANELS RC RH G W2 C RSC RSA RSB RSR R ...
Page 20 - RJ11 Connectors; When addressing the thermostats, the; ILLUSTRATION 13; Replace the shunts on just one of the pins.; DIAGRAM 8; – Adding an 8840 Series Thermostat
PROTOCOL ADAPTER WITH COVER REMOVED JP9 Place these 2 jumpers on just one pin RJ11 Connectors Y2 W1 24V(c) 24V R G Y1 W2 CLK1 RS1 1 RS+v RS2 CLK2 2 Communication Card MODEL 8809 COMMUNICATING SUB-BASE MODEL 8848 SHOWN ORG/WHT BLU ORG 40VA XFRMR BRN GRN BLU/WHT ORG/WHT BLU ORG ORG RED BLK BLU 40VA XF...
Page 21 - SN; not be sent with commands as this is a recognized ASCII; “COMMAND”; APRILAIRE COMMAND SET; Appendix 2; or; Enter
A full command set and detailed explanation of the command set is available for those who want to write their own software. Contact Research Products Corporation at 888-782-8638 to request a copy of DP 10005756. Upper or lower case letters may be used for all commands. Invalid characters will immedi...
Page 22 - MODEL 8870 BASIC COMMAND SET
COMMAND DESCRIPTION VALUE Communication Control Commands CR Command Response Control Silent / Quiet / Normal C1 Change of State (COS) – HVAC relays ON/OFF C2 COS – Temperature ON/OFF C3 COS – Remote Temperature ON/OFF C5 COS – Set Points ON/OFF C6 COS – Network Override ON/OFF C7 COS – Mode ON/OFF C...