Honeywell RTHL2510 Series Programmable Thermostat Owner’s Manual

Honeywell RTHL2510 Manual: Questions and Answers

How do I install the Honeywell RTHL2510 on my wall?

Mount the wallplate using included screws and anchors. Drill 3/16-in. holes for drywall or 3/32-in. holes for plaster.

1. Drill holes at the marked locations.
2. Insert anchors into the holes.
3. Secure the wallplate with screws. Owner's Manual, p. 5

How do I connect wires to the Honeywell RTHL2510 thermostat?

Match wire labels to the corresponding letters on the thermostat terminals.

1. Insert wires into the correct terminal holes.
2. Tighten the terminal screws to secure each wire.
3. If labels don't match thermostat letters, check the alternate wiring chart on pages 6 or 7.
4. Remove the metal jumper between R and Rc terminals only if you have both R and Rc wires.
5. Wrap any bare wire ends with electrical tape. Owner's Manual, p. 5

Can I use the Honeywell RTHL2510 with both gas and heat pump systems?

Yes, but you must set the fan operation switch correctly. Leave it in the factory position for gas or oil systems. Move it to the alternate position for heat pump or electric heat systems. Owner's Manual, p. 8

What's the difference between Heat Pump with Backup Heat and single stage cooling on the Honeywell RTHL2510?

Single stage heat and cool systems need no advanced setup. Heat pump with backup heat requires you to enter Advanced Installation and match the thermostat to your system type. Owner's Manual, p. 9

What does Setting 15 control on the Honeywell RTHL2510?

Compressor Protection. Turn it On or Off. Owner's Manual, p. 10

What do the RUN and HOLD buttons do on Honeywell RTHL2510?

Owner's Manual, p. 14

Why isn't "Cool On" displaying on my Honeywell RTHL2510?

Set the System switch to Cool and adjust the temperature level below the current room temperature. Owner's Manual, p. 17

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