Thank you for purchasing a Robertshaw® thermostat. This manual will describe how to install and test the Robertshaw RS8110 thermostat.
Thermostat System Types
Gas, Oil, or Electric Heat with Air Conditioning |
Heat Pumps (without auxiliary or emergency heat) |
Heat-Only, including for Floor and Wall-Furnace |
Cool-Only |
750 Millivolt Heating Systems |
Power Options
Install the thermostat 4 to 5 feet above the floor in an area with good air circulation and average temperature. For new installations, mount thermostat on an inside wall, 4-5 feet above the floor. Do not install the thermostat in the following locations:
Installation at these locations will affect thermostat operation.
Caution:
Electrical Hazard.
Disconnect power before installing this product. Failure to do so can cause electric shock or equipment damage.
Mercury Notice:
This product is mercury-free. However, if this product is replacing a control that contains mercury, it needs to be disposed of properly. Contact your local waste management authority for instructions regarding recycling and proper disposal of the control.
For a vertical mount, put screws on the top and bottom. For a horizontal mount, put screws on the left and the right.
Wiring Labels
Apply these wiring labels to each wire with the appropriate terminal designation as you remove it from the existing thermostat.
Alternate Wiring (Conventional Systems)
If labels do not match the letters on the thermostat, check the chart below and connect to the terminal as shown here (See notes, below).
Terminal Designations
RH & RC terminals
In a single-transformer system, leave the metal jumper in place between the RH and RC. Remove the metal jumper in two-transformer systems.
Heat Pump Systems (with No Auxiliary or Emergency Heat)
If wiring to a heat pump, use a small piece of wire (not supplied) to connect terminals W (Heat relay) & Y (Compressor relay).
Wire specifications
Use 18- to 22-gauge thermostat wire. Shielded wire is not required.
Common Wire
The C (common wire) is optional when the thermostat is powered by batteries
Gas or Electric Setup
Select GAS or ELEC depending on the type of furnace. If ELEC is selected, the thermostat will operate the fan when the fan relay is connected to the G terminal.
Adjusting the Differential (Also called Swing or Cycle rate)
The differential is adjustable, a smaller differential will cause more frequent cycles and a larger differential will cause fewer cycles. There are separate differentials for heat and for cool. Follow the steps below to adjust the differential for heat or cool:
This feature allows the Installer to change the calibration of the room temperature display. For example: If the thermostat reads 70° and you would like it to read 72° then select +2. You can adjust the room temperature display to read -4°F to +4°F above or below the factory-calibrated reading. Follow the steps below to adjust the temperature reading:
Mount Thermostat
Align the 4 tabs on the subbase with corresponding slots on the back of the thermostat, then push gently until the thermostat snaps in place.
Battery Installation
Battery installation is optional if used with AC power (the C terminal is connected). During power outages, the batteries will save settings and power the display.
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Technical Service +1.800.445.8299
HVACCustomerService@robertshaw.com
www.robertshaw.com 352-00301-001352-00301-001 Rev. B
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Robertshaw® is a trademark of Robertshaw Controls Company.
Year Limited Warranty Use Phone to Scan for Warranty Info
Download Manual:
Robertshaw RS8110 Non-Programmable Thermostat Installation Manual
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Robertshaw RS8110 Non-Programmable Thermostat Operation Manual
Robertshaw RS8110 Non-Programmable Thermostat Product Specifications Guide
Robertshaw RS8110 Non-Programmable Thermostat Installation Manual
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