Hunter Set & Save 110B Programmable Thermostat User Manual

Quick Guide

The Hunter Set & Save 110B is a programmable thermostat designed for gas, oil, and electric furnace systems. It features a 7-day programmable schedule, compressor protection, and a span adjustment for cycle control. It is powered by two AA alkaline batteries.

Important Limitations: This thermostat is NOT compatible with 110/220V baseboard electric heating systems or multi-stage heat pumps.

Installation

Before starting, turn off power to the furnace at the main power panel. Label all existing wires before disconnecting them from the old thermostat.

• Wiring: Match wires to the appropriate terminals (Rh, Rc, G, Y, W). If your system has separate Rh and Rc wires (5-wire system), remove the jumper wire between Rh and Rc. For 2, 3, or 4-wire systems, leave the jumper in place.
• Mounting: Remove the wallplate from the thermostat by pressing the release tab. Position the wallplate, level it, and secure it to the wall using the provided anchors and screws.
• Finalizing: Push excess wire back into the wall hole to prevent interference. Snap the thermostat body onto the wallplate. Insert two AA alkaline batteries.

Operation

Setting Day and Time: Press the DAY/TIME key to enter setting mode. Use the Up/Down keys to adjust the hour, minute, and day. Press DAY/TIME again to confirm.

Programming: The thermostat comes with pre-programmed settings. To customize, press the PROGRAM key. Use the Up/Down keys to set the time and temperature for each of the 4 programs per day. Repeat for all days of the week.

Manual Override: Press and hold the HOLD/RET key for 1 second to enter manual override. You can adjust the temperature temporarily, which will be cancelled at the next program change. For a permanent hold (vacation), press the HOLD/RET key once to lock the current temperature.

Settings and Maintenance

Selector Switches: Located on the circuit board, the HG/HE switch must be set correctly. Use 'HG' for gas and oil systems, and 'HE' for electric systems with a fan relay. The F/C switch allows toggling between Fahrenheit and Celsius.

Span Setting: To adjust cycle frequency, press and hold both Up and Down keys for 3 seconds. Adjust the span (1-3) to change how often the system cycles. A higher span increases cycle time.

Battery Replacement: When the low battery indicator flashes, replace the batteries immediately. The thermostat retains settings for approximately 1 minute during battery changes.

Troubleshooting

If the thermostat is not functioning correctly, try the following:

• No Display: Check battery connections or replace batteries. Press the Reset button.
• Heating/Cooling not turning on: Ensure the system switch is in the correct position (HEAT or COOL). Wait up to 4 minutes for the compressor protection delay to expire. Check circuit breakers.
• Err on Display: Replace batteries and press the Reset button.
• Scrambled Display: If the unit is new, remove the clear Mylar sticker from the display. Otherwise, replace batteries.