Robertshaw RS4110 User Manual download pdf (Page 4)

User Programmable Settings (Default)

During any program changes the display returns back to the operating

display if a button has not been pushed in 10 seconds.

The temperature scale is set to Fahrenheit.

Night light is off.

The first stage differential is 1F degree.

The second stage differential (RS4220) is 2F degrees.

Auto changeover deadband is 3F degrees.

Filter reminder length is off.

Temperature offset is 0 degrees.

The HI heat limit is 90°F (32°C).

The LO cool limit is 45°F (7°C)

The operation mode will be one of the following:

The fan setting is Auto.

The keypad has no password protection.

Refer to the pop up wizard section in the installation manual for a

complete list of factory defaults and contractor settings.

Emergency Heat

Your system may include Emergency Heat. The RS4220 thermostats have

an emergency heat capability for multi stage heat pump systems. To

determine if your system is capable of using emergency heat contact your

contractor. Use the button to enter the EMER mode. An E will be

displayed with the Heat symbol. This mode is used to bypass the heat

pump when it needs servicing or when it cannot keep up with the heat

demand.

Auto Changeover

Auto changeover is the ability of the thermostat to switch automatically

between heating settings and cooling settings. This is useful in Spring and

Fall when the days are warm and the nights are cool. In heat mode if the

room continues to warm beyond a set threshold the thermostat switches

to the cool mode and the associated cooling settings. The reverse is also

true.

As the room temperature changes, the thermostat will call for heating or

cooling as needed. To prevent the heating and cooling systems from

overriding each other, an automatic changeover deadband is used.

The deadband is the number of degrees that the room temperature can

move away from the active setpoint until heating or cooling is called for.

The larger the deadband the more the room temperature will vary.

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Robertshaw RS4110 User Manual Page 4