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Home Automation RC-90BZ Installation Instructions Manual

Single stage heat/cool thermostat for zone control systems
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DESCRIPTION
The RC-90BZ is a precision digital thermostat designed for 24 VAC single stage heating and cooling systems.
It has the capability of being controlled both locally and by remote control. It offers programmability, stand-
alone operation, and robust, optically isolated communications with automation systems, utility control systems,
and personal computers. The RC-90B is equipped with a "cool blue" backlight display.
Electrical rating:
Maximum current:
Thermostat operating current:
The following requirements must be observed for installation in Europe: CE
1. This equipment must be installed in accordance with National wiring rules for the country in which it is
installed.
2. Fuses must be replaced only with IEC rated components.
3. All product labels, instructions and markings relating to safety must be translated to a language, which is
acceptable in the country in which this equipment is to be installed.
INSTALLATION
Before installing this thermostat:
1. Read all of the installation instructions carefully. Read the Owner's Manual carefully.
2. Ensure that this product is suitable for your application.
3. Ensure that wiring complies with all codes and ordinances.
4. Disconnect power to the control transformer to prevent electrical shock and damage to equipment.
5. Select an appropriate location to ensure an accurate temperature reading.
Location
When replacing an existing thermostat, install the RC-90BZ in the same location. If the existing location
doesn't meet the following criteria, choose a new location to mount the RC-90BZ. When choosing a location
for the thermostat:
1. Ensure that the thermostat is mounted 5 feet above the floor and is at least 2 feet from an outdoor wall.
2. Ensure that the thermostat is located in an area where there is adequate air circulation.
3. Do not mount in the path of direct sunlight or of radiant heat generated by appliances.
4. Do not mount behind an outdoor wall, near a fireplace, or in the path of any air ducts.
RC-90BZ Single Stage Heat/Cool
Thermostat for Zone Control Systems

Installation Instructions

24 V; 3 A; 50/60 Hz
2 A on any circuit, 3 A total
less than 15 mA
Document Number 13I00-64 / Rev A / May, 2007
Copyright © 1999-2007 Home Automation, Inc.
All Rights Reserved
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Summary of Contents for Home Automation RC-90BZ

  • Page 1: Installation Instructions

    Installation Instructions DESCRIPTION The RC-90BZ is a precision digital thermostat designed for 24 VAC single stage heating and cooling systems. It has the capability of being controlled both locally and by remote control. It offers programmability, stand- alone operation, and robust, optically isolated communications with automation systems, utility control systems, and personal computers.
  • Page 2 4. Remove the existing plate or base from the wall. MOUNTING When mounting the RC-90BZ, grasp the thermostat by the sides, avoiding the keys, and unsnap the base from the face. Holding the base to the wall so that the word "TOP" is upright and facing you: 1.
  • Page 3 Connect each wire to the terminal strip on the thermostat base per the wiring diagram for your system application - See Figures 4 - 7. Form the thermostat wiring so that the cable lies flat between the terminal strip and the center of the base. Upon completion of wiring the thermostat, push all excess wiring into the hole in the wall.

  • Page 4: Typical Wiring Diagrams

    TYPICAL WIRING DIAGRAMS CAUTION: Be sure to disconnect the power to the control transformer before removing or installing thermostat. Do not short gas valve, fan, cool mode relay, heat mode relay, heat relay, or cool relay...even momentarily. This will blow a non-replaceable fuse. Do not attempt to hook up to live circuits.
  • Page 5 Figure 5 – Installation as a Master thermostat...
  • Page 6 Figure 6 – Installation as a Slave thermostat Figure 7 - Installation as a Zone thermostat with separate transformer - Required by some zone panels...

  • Page 7: Disable Keys

    OFF). CONFIGURING THE BACKLIGHT ON THE RC-90BZ The backlight on the RC-90BZ can be configured to one of three different modes: 1) on for 30 seconds when a key is pressed, 2) always on, or 3) always off. To configure the display backlight to turn on when a key is pressed, then back off 30 seconds later, set the “JP2”...

  • Page 8: Installer Setup

    TO DISABLE KEYS LOCALLY SELECT BACKLIGHT SOLDER WIRE JUMPER HERE MODE (SET JUMPER) Figure 8 INSTALLER SETUP This section describes the items that the installer must setup as part of the thermostat installation. The Installer Setup mode is used to configure the general operating parameters of the thermostat. When in Installer Setup mode: 1.
  • Page 9 Address If you are using Communications Mode 0 or 1, and you are installing more than one thermostat, each must be set to a consecutive address, starting at 1. The default address setting is 1. An address from 1- 127 may be selected. Communications mode The thermostat can communicate with remote systems in 4 different modes.
  • Page 10 Calibration offset This item is used to raise or lower the current temperature reading by 1 degree Fahrenheit or 1/2 degree Celsius. If this item is set to 30, no change will be made. Each digit below 30 will lower to temperature, and each digit above 30 will raise the temperature.
  • Page 11 No anticipation Normal anticipation Maximum anticipation The following settings are recommended: Forced air systems: 4 Radiant systems: 6 A lower setting will decrease the tendency to turn off the heating system before the desired heat setting is reached. If the heating system response time is slower, as are most radiant heating systems, a higher number will help maintain an even space temperature.
  • Page 12 Note: If an HAI automation system is being used, the controller system time is sent to the thermostat every minute. This adjustment will have no effect. Filter reminder The thermostat logs the amount of time the system fan has been running. When this setting reaches 0, the thermostat will display a reminder to replace the filter.
  • Page 13 COMMAND_CLASS_SWITCH_BINARY COMMAND_CLASS_CLOCK COMMAND_CLASS_THERMOSTAT_MODE Upon power up, allow 10 seconds for the RC-90BZ thermostat to initialize. After 10 seconds, a controller can set the mode, get the current mode, and get the modes supported by the thermostat. COMMAND_CLASS_THERMOSTAT_SETPOINT Upon power up, allow 10 seconds for the RC-90BZ thermostat to initialize. After 10 seconds, a controller can...
  • Page 14 The RC-90BZ thermostat uses this command class to report the actual temperature. COMMAND_CLASS_ASSOCIATION Upon power up, allow 10 seconds for the RC-90BZ thermostat to initialize. After 10 seconds, a controller can issue an Association Set, Remove, or Get command. The thermostat must be associated with a controller to provide feedback.

  • Page 15: Interoperability With Z-Wave™ Devices

    COMMAND_CLASS_CLOCK Upon power up, allow 10 seconds for the RC-90BZ thermostat to initialize. After 10 seconds, a controller can set the time of the internal clock INTEROPERABILITY WITH Z-WAVE™ DEVICES A Z-Wave™ network can integrate devices of various classes, and these devices can be made by different manufacturers.

  • Page 16: Troubleshooting Tips

    TROUBLESHOOTING TIPS SYMPTOM ACTION TO TAKE Thermostat Dead Check power to the thermostat Check wiring diagrams Check thermostat temperature sensor Thermostat will not operate with a damaged temperature sensor. SYMPTOM ACTION TO TAKE Fan, Heat, Or Cool Check for break in G, W, or Y wire Inoperative Allow minimum off time to pass Check system options for correct settings...

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