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FEATURES

Structure of thermostat and explanation for the keypads

We are pleased you have selected one of our wall 

thermostats. Our products are manufactured to high quality

standards and are designed for years of service. 

Read This Before Installing Thermostat

OPERATION

YOUR THERMOSTAT FUNCTIONS WITH

This thermostat will NOT control 110/220 Volt systems.

IMPORTANT

Read the entire installation section of this Owner’s Manual

thoroughly before you begin to install or operate your

Thermostat.

REMOVE THE MYLAR LABEL FROM THE LCD DISPLAY

WINDOW.

INSTALLATION

All programming is normally performed at your 

thermostat’s location.

COMPRESSOR PROTECTION

The thermostat provides a 4-minute delay after shutting off

the heating or cooling system before it can be restarted.

This feature will prevent damage to your compressor

caused by rapid cycling. Note that this delay also applies 

to the heating system control. It does not provide a delay

when there are power outages. You can select the function

ON or OFF during the configuration. 

TEMPERATURE RANGE

This thermostat can be programmed between 45ºF and

95ºF (7ºC and 35ºC). However, it will display room tempera-

tures from 30ºF to 99ºF (0ºC and 37ºC). HI will be displayed

if the temperature is higher than 99ºF (37ºC), and LO will be

displayed if the temperature is lower than 30ºF (0ºC).This

thermostat will automatically shut down in Heat mode if the

temperature rises above 95ºF (35ºC), and automatically shut

down in cool mode if the temperature drops below 45ºF

(7ºC).

NOTE: If the thermostat measures a temperature over

99ºF(37ºC), HI will be displayed on the LCD If the tempera-

ture is below 32ºF(0ºC), LO will be displayed on the LCD.

POWER FAILURE

Whenever the main power is interrupted or fails, the 

battery power retains the current time for approximately one

minute. This thermostat has permanent memory, although

you will have to reset your clock when there are power 

outages of longer duration than one minute.

POWER SUPPLY

The thermostat is powered by 24 VAC, with batteries 

providing backup.

BATTERY WARNING

Fresh alkaline batteries should provide about one year of

service. However, when the batteries become weak, BATT

will alternate on the display with the current time. When this

message occurs, install 2 new AA batteries. You have

approximately 1 minute to change the batteries and keep

thermostat’s clock. Once the batteries have become too

weak to ensure proper operation, your system will be turned

off, and the display will be cleared except for BATT flashing

on the LCD display.

CAUTION:

Once the BATT display occurs, the thermostat 

is shut down, and your system will no longer

operate. In this condition, there is no temperature

control. NOTE: The backlight will not function

when the thermostat is in low battery condition.

NOTE: If you plan to be away from the premises over 30

days, we recommend that you replace the old batteries

with new alkaline batteries prior to leaving.

INSTALLATION

What You Need (Note: A fossil fuel kit is required.):

This thermostat includes two #8 slotted screws and two

wall anchors for mounting. To install your thermostat, you

should have the following tools and materials.

• Slotted screwdriver(s) • Small Philips screwdriver •

Hammer • Electric drill, 3/16” bit • Two 1.5V (AA) size alkaline

batteries (included)

CAUTION:

To prevent electrical shock and/or equipment damage,

disconnect electric power to system at main fuse or cir-

cuit breaker box until installation is complete.

Before removing wires from the old thermostat, label each

wire with the terminal designation it was removed from.

1. Shut off electricity at the main fuse box until installation is

complete. Ensure that electrical power is disconnected.

2. Remove Old Thermostat: A standard heat/cool 

thermostat consists of three basic parts:

a. The cover, which may be either a snap-on or hinge

type.

b. The base, which is removed by loosening all screws.

c. The switching subbase, which is removed by 

unscrewing the mounting screws that hold it on the

wall or adaptor plate. 

3. Remove the front cover of the old thermostat. With wires

still attached, remove wall plate from the wall. If the old

thermostat has a wall mounting plate, remove the ther-

mostat and the wall mounting plate as an assembly.

4. Identify each wire attached to the old thermostat.

5. Disconnect the wires from the old thermostat one at a

time. 

DO NOT LET WIRES FALL BACK INTO THE WALL.

6. Install new thermostat using the following procedures.

WARNING

Do not use on circuits exceeding specified voltage.

Higher voltage will damage the control and could cause

a shock or fire hazard. Do not short out terminals on

gas valve or primary control to test. Incorrect wiring will

damage thermostat and could cause personal injury

and/or property damage. 

Selector Switches

Figure 1. Electric/Gas Switch (Fan Option)

This thermostat is configured from the factory to operate a

heat/ cool, fossil fuel (gas, oil, etc.), forced air system. It is

configured correctly for any system that DOES NOT require

the thermostat to energize the fan on a call for heat. If your

system is an electric heat or heat-pump system that

requires the thermostat to turn on the fan on a call for heat,

locate the ELEC/GAS switch on the back of the thermostat

(see Figure 1) and switch it to the ELEC position. This will

allow the thermostat to energize the fan immediately on 

a call for heat. If you are unsure if the heating/cooling 

system requires the thermostat to control the fan, contact a

qualified heating and air conditioning service person. When

the thermostat is configured for heat pump, the thermostat

will always power the circulator fan on a call for heat in the

HEAT mode. The ELEC/GAS switch must be set to match

the type of auxiliary heat your system uses for proper 

operation in the EMERGENCY mode.

All wiring diagrams are for typical systems only. Refer to

equipment manufacturer’s instructions for specific system

wiring information.

Attach Thermostat Base to Wall

1. Remove the packing material from the thermostat. Gently

pull the cover straight off the base. Forcing or prying will

cause damage to the unit.

2. Connect wires beneath terminal screws on base using

appropriate wiring schematic (see Figure 2 through 6).

3. Place base over hole in wall and mark mounting hole

locations on wall using base as a template.

4. Move base out of the way. Drill mounting holes.

5. Fasten base loosely to wall, as shown in Figure 1, using

two mounting screws. Place a level against bottom of

base, adjust until level, and then tighten screws. (Leveling

is for appearance only and will not affect thermostat

operation.) If you are using existing mounting holes, or if

holes drilled are too large and do not allow you to tighten

base snugly, use plastic screw anchors to secure base.

6. Push excess wire into wall and plug hole with a fire

resistant material (such as fiberglass insulation) to 

prevent drafts from affecting thermostat operation.

Figure 2. Thermostat Base

Digital Thermostat

Owners Manual
Model: RS2210 Series

Description

Heat Pump (No Aux. or Emergency Heat)

Yes

Heat Pump (with Aux. or Emergency Heat)

Yes

Standard Heat & Cooling Systems

Yes

Two Stage Heat & One Stage Cool

Yes

Standard Heat Only Systems

Yes

Millivolt Heat Only Systems – Floor or Wall Furnaces

Yes

Standard Central Air Conditioning

Yes

Gas or Oil Heat

Yes

Electric Furnace

Yes

Hydronic (Hot Water) Zone Heat-2 Wires

Yes

Hydronic (Hot Water) Zone Heat–3 Wires

No

352-00021-002 Rev A

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