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HAI RC-80 Omnistat Installation Instructions Manual

Other manuals for RC-80 Omnistat: Installation Manual

Summary of RC-80 Omnistat

  • Page 1

    1 1 rc-80 / rc-80b single stage heat/cool thermostat installation instructions description the rc-80 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...

  • Page 2: Figure 1

    2 2 removing an existing thermostat 1. Disconnect the power to the control transformer. 2. Remove the cover to the existing thermostat. 3. Disconnect the wires going to each terminal on the thermostat. Label each wire with the letter or number at the terminal. 4. Remove the existing plate or base fr...

  • Page 3: Figure 2

    3 3 connect each wire to the terminal strip on the thermostat base per the wiring diagram for your system application - see figures 4 - 8. Form the thermostat wiring so that the cable lies flat between the terminal strip and the center of the base. If a remote system is being used with the thermosta...

  • Page 4: Caution:

    4 4 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, heat relay, or cool relay...Even momentarily. This will blow a non-replaceable fuse. Do not attempt to hook up to live circuits. An a...

  • Page 5

    5 5 common wire is required in “cool only” applications figure 6 - single stage cool only thermostat * common wire is required to use the display backlight in the rc-80b. Also use if heat, cool, or fan relay cannot supply 15ma to power thermostat, without activating. Figure 7 - single stage heat/coo...

  • Page 6

    6 6 * do not connect rc and rh together. Figure 8 - heating & cooling with separate transformers configuring the backlight on the rc-80b the backlight on the rc-80b 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. 1) to co...

  • Page 7

    7 7 solder wire jumper here select backlight mode (set jumper) to disable keys locally figure 9 power up 1. Double check wiring, be sure that thereareno stray wires or wire strands at the connections. 2. It is not necessary to connect the remote system (comm) cable at this time. 3. Connect power to ...

  • Page 8

    8 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. The small digits on the top of the display are...

  • Page 9

    9 9 00 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. 01 communications mode the thermostat can communicate with ...

  • Page 10

    1 1 0 0 04 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. (1 = “...

  • Page 11

    1 1 1 1 10 heating anticipator this item adjusts the tendency of the thermostat to turn the heating unit off before the desired heat setting is reached. This is done to avoid overheating the air while the walls and furniture catch up. A setting of 0 will disable this feature. 0 no anticipation 3-5 n...

  • Page 12

    1 1 2 2 14 clock adjust if the clock on the thermostat is running faster or slower than the actual time, you can have the thermostat automatically compensate up to 29 seconds per day. The thermostat will add or subtract the selected amount of time daily. (1 = “- 29” to 59 = “+ 29” seconds per day; 3...

  • Page 13

    1 1 3 3 quick-reference setup guide this table displays each installer setup item with its default setting. The column labeled "current" can be used to write down the current settings if any changes are made to the default settings. Item number description default current 00 address 1 01 communicati...

  • Page 14

    1 1 4 4 note: do not connect the red comm cable wire to 12v. Figure 10 - hookup to an hai system additional thermostats are connected in parallel. They may be connected in home-run or daisy chain configuration..

  • Page 15

    1 1 5 5 remote day/night setback switches the thermostat can be connected to a remote system or remote switch. A signal can be sent from the remote location to change the thermostat temperature settings from the "day" setting to the "night" setting. To use this mode, setup item 01 - "communications ...

  • Page 16

    1 1 6 6 troubleshooting tips symptom action to take 1. Check power to the thermostat 2. Check wiring diagrams thermostat dead 3. Check thermostat temperature sensor thermostat will not operate with a damaged temperature sensor symptom action to take 1. Check for break in g, w, or y wire 2. Allow min...