Robertshaw RS8110 Non-Programmable Thermostat Installation Manual

Always turn off power at the main power source by unscrewing the fuse or switching the circuit breaker to the off position before installing, removing, cleaning, or servicing the thermostat.
Read all of the information in this manual before installing or programming this thermostat.
This is a 24V AC low-voltage thermostat. Do not install on voltages higher than 30V AC.
All wiring must conform to local and national building and electrical codes and ordinances.
Do not short (jumper) across terminals on the gas valve or at the system control to test installation. This will damage the thermostat and void the warranty.

INSTALLATION LOCATION

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:

Behind a Door
In a Corner
Near Air Vents
In Direct Sunlight
With an Outside Wall Behind the Thermostat
Near any Heat or Steam Generating Fixtures
Near any Concealed Pipes or Chimneys

Installation at these locations will affect thermostat operation.

Getting to know your thermostat

LCD Display
Fan Switch
System Switch
Temperature Set-Point Buttons
Easy change battery door

WALLPLATE INSTALLATION

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

Turn Off Power to the Heating/Cooling System
Remove Old Thermostat Remove the old thermostat but leave the wallplate with wires attached.
Label Wires with Tags Label the wires using the supplied wire labels as you disconnect them.
Separate Wallplate from New Thermostat Remove the wallplate from the new thermostat and mount it onto the wall.
Separate Wallplate from New Thermostat Mount the new wallplate using the included screws and anchors.
Connect Wires Simply match wire labels. If labels do not match the letters on the thermostat, check “Alternate Wiring (Conventional Systems)” on page 9 and connect to the terminal as shown (see notes, below).

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).

Remove the metal jumper if wires will be connected to both RH/R and RC terminals.
If a 24-volt common wire is present (typically labeled C or X) connect it to the C terminal. The C terminal is not used if a 24-volt common wire is not present.
The O and B terminals are for a reversing valve (single-stage heat pump application ONLY). These terminals are not used on a system that is not a heat pump.
Place a jumper wire between the Y and W terminals if you have a single-stage heat pump system ONLY.

Terminal Designations

W Heat relay
G Fan relay
Y Compressor relay
O Heat pump reversing valve energized in cooling
RC 24-volt cooling transformer
RH/R 24-volt heating transformer OR 24-volt power terminal if a common wire is present
B Heat pump reversing valve energized in heating
C 24-volt common terminal

Notes:

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

Power supply.
Factory-Installed jumper. Remove only when installing on 2-transformer systems.
Use either O or B terminals for reversing the valve. Heat pump application ONLY.
Use a small piece of wire (not supplied) to connect W and Y terminals.
Set the fan operation switch to either gas or electric based on your system.
Optional 24 VAC common connection not to be used when powering thermostat with 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:

Select HEAT or COOL with the system switch.
Hold down the keys together for 3 seconds.
Use the or key to adjust the differential. The differential is adjustable from ±0.2°F to ±2°F. For example, A differential setting of 0.5°F will turn the cooling on at approximately 0.5°F above the setpoint and turn the cooling off at approximately 0.5°F below the setpoint. The factory default for cooling is 0.5°F and 0.4°F for heating.
Wait approximately 10 seconds for the thermostat to return to normal operation.

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:

Select OFF with the system switch.
Hold down the keys together for 3 seconds.
Use the key to adjust the room temperature display.
Then press to access the F (Fahrenheit) or C (Celsius) setting. use to select.
Press again to access the compressor DELAY selection. The compressor delay will not allow
the compressor to be turned on for 5 minutes after the last time the compressor was shut down. Use the to select ON or OFF. (ON will prevent the compressor from starting for at least 3 minutes). Wait approximately 15 seconds or slide the system switch to return to normal operation.

MOUNTING & BATTERY INSTALLATION

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.

SPECIFICATIONS

Temperature Display Range…………….41°F to 95°F (5°C to 35°C)
Temperature Control Range…………….44°F to 90°F (7°C to 32°C)
Load Rating…………………………………..1 amp per terminal, 1.5 amp maximum for all terminals combined
Display Accuracy……………………………± 1°F
Differential……………………………………. Heating is adjustable from 0.2°F to 2.0°F
Cooling is adjustable from 0.2°F to 2.0°F
Power Source………………………………..18 to 30 VAC, NEC Class II, 50/60 Hz for hardwire (common wire)
Battery power from 2 AAA Alkaline batteries
Operating Ambient Temperature………32°F to +105°F (0°C to +41°C)
Operating Humidity………………………..90% non-condensing maximum
Dimensions……………………………………4.72”W x 3.80”H x 0.98”D

Customer Service +1.800.304.6563
Technical Service +1.800.445.8299
[email protected]
www.robertshaw.com 352-00301-001352-00301-001 Rev. B
© 2021 Robertshaw Controls Company.
Robertshaw® is a trademark of Robertshaw Controls Company.

Year Limited Warranty Use Phone to Scan for Warranty Info

REFERENCE:

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Robertshaw RS8110 Non-Programmable Thermostat Installation Manual

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Robertshaw RS8110 Non-Programmable Thermostat Installation Manual