Assessments - 3, GPA: 4
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Instructions for the Aprilaire 8840 Series communicating thermostat system are found in a separate document (DP 10004345). A portion of the command set is found in Appendix 2 in this manual. For a complete command set with programming suggestions, see the programming manual (DP 10005756). Contact Research Products Corporation for these documents at 888-782-8638. THERE ARE 14 STEPS INVOLVED IN THE INSTALLATION OF A COMPLETE SYSTEM. Step 1 GET ALL THE COMPONENTS YOU WILL NEED 1 Step 2 DISCONNECT POWER TO ALL HVAC EQUIPMENT AND/OR ZONE CONTROL PANELS 2 Step 3 RUN THE REQUIRED WIRES 3 Step 4 LOCATE AND MOUNT THE AUTOMATION SYSTEM COMPONENTS 4 Step 5 CONNECT THE CONTROL WIRES TO THE HVAC/ZONE SYSTEM AND THERMOSTATS 6 Step 6 CONNECT THE COMMUNICATION AND POWER WIRES TO THE DISTRIBUTION PANEL AND THERMOSTAT 8 Step 7 CONNECT MULTIPLE DISTRIBUTION PANELS 9 Step 8 CONNECT PROTOCOL ADAPTER TO THE DISTRIBUTION PANEL AND HOST COMPUTER OR AUTOMATION SYSTEM 10 Step 9 PROVIDE POWER TO THE DISTRIBUTION PANEL 11 Step 10 TURN ON POWER TO ALL HVAC EQUIPMENT AND TO THE THERMOSTATS 11 Step 11 CHECK-OUT HVAC SYSTEM OPERATION 11 Step 12 ADDRESS THE THERMOSTATS AND SET HIGHEST ADDRESS 12 Step 13 SETUP COMPUTER FOR COMMUNICATION SYSTEM CHECKOUT 13 Step 14 CHECK-OUT COMMUNICATIONS TO THE THERMOSTAT NETWORK 16 Appendix 1 SPECIAL CONSIDERATIONS FOR INSTALLING THE MODEL 8870 WITH THE 8840 SERIES COMMUNICATING THERMOSTAT 17 Appendix 2 APRILAIRE COMMAND SET 19 EXTRA NETWORK INTERCONNECTION WORKSHEET 21 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. © Research Products Corp. Step1 GET ALL THE COMPONENTS YOU WILL NEED COMPONENTS YOU WILL NEED… (see ILLUSTRATION 1) TOOLS YOU WILL NEED… • One Aprilaire® Model 8870 Communicating Thermostat for each • Small flat head screwdriver for terminal zone or single zone HVAC system screws (1/8” wide tip) • One Aprilaire Model 8818 Distribution Panel per eight (8) • Medium size flat/phillips head screwdriver for thermostats in the system component mounting screws • One Aprilaire Model 8811 Protocol Adapter per 32 thermostats • Volt/ohm meter or one per Model 8823 system controller • Computer with available com port (RS-232) • 4 to 8 conductor thermostat cable depending on equipment and terminal emulator such as HyperTerminal stages (18 – 20 gauge) (for system checkout) • Category 5 communication wire (4-pair twisted cable) • Wire strippers • One 24V AC transformer, ungrounded (part number 8027) per • Small level (use to mount components level, 8818 Distribution Panel required for appearance only) • RS-232 or RS-485 based automation system such as the Aprilaire Model 8823 System Controller • OPTIONAL: Aprilaire Model 8061 Temperature Support Module or Model 8062 Temperature/Humidity Support Module ILLUSTRATION 1 – System Components Model 8870 Thermostat RS-422 Communicating Thermostat controls single B+ BREFARCA+ AB+ BR CA+ AB+ BR CA+ AB+ BR CA+ AB+ BA B A+ OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF PWR PWR PWR PWR PWR PWR PWR PWR A B A B A B A B A B A B A B A B MAIN PWR ON OFFRC 24VAC RC A+ AB+ FUSE SPARE FUSE BRC A+ AB+ BRC A+ AB+ BRC A+ AB+ Bor multi-stage heat/cool or heat pump HVAC systems. Model 8818 Distribution Panel Switches in the Distribution Panel allow power or communications to be turned off at each individual thermostat to make installation and troubleshooting easy. RX TX DATA RS-232 RX TX ENABLE RS-485 RX TX DATA RS-485 POWER Model 8811 Protocol Adapter Power 7.5VAC RS-485 RS-485 RS-232 Model 8811 Protocol Adapter Model 8061 and 8062 Support Modules Use to convert RS-485 communication signal from Aprilaire Up to four can be connected to a single thermostat Communication System to RS-232 communication signal to sense temperature or relative humidity at a readable by host computer. Supports up to 32 thermostats. location remote from the thermostat. 1 MODEL 8870 THERMOSTAT The Model 8870 Thermostat is field configurable to operate single and multi-stage separate heating and cooling equipment (such as furnace and air conditioner or roof top units), or single and multi-stage heat pump systems. A menu driven set up, using the message center display of the thermostat, can be used to configure many other features. Network communication is non-isolated, full duplex RS-485 (RS-422). The ‘A’ terminals are the transmit pair while the ‘B’ terminals are the receive pair. This nomenclature uses the computer or host as the reference, so transmit refers to the lines on which the host transmits data to the thermostat while receive refers to the lines on which the host receives data from the thermostat. The bau...