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4.2

Setting Current Time of Day and Day of Week

NOTE: It is important for you to set the current time of day (note AM/PM indicator in

display), and the current day of week correctly to avoid problems with program execution.

4.1

Default Thermostat Settings

NOTE: The thermostat will return to normal operating mode automatically after 15

seconds if no key is pressed. It will also return to normal operating mode immediately if

the RETURN button is pressed.

When in normal operating mode, press the DAY/TIME keypad button. The LCD display will

be cleared except for the time, am/pm indicator and the day of the week. The hour portion

of the time will ﬂash.

Press the or button to set the current hour.

Press the DAY/TIME button again, the minute portion

of the time will ﬂash.

Press the or button to set the current minute.

Press the DAY/TIME button again, the day of the week indicator will ﬂash.

Press the or button to set the current day of the week.

4.3

Setting Thermostat User Options

The default user options are compatible with most systems and applications. They are normally

set at the time of installation and usually do not require any modiﬁcation under normal operating

conditions. If you desire to change these settings, simply follow the instructions below.

NOTE: The ﬁrst and second stage differential settings are the same for both the heating and

cooling systems.

First Stage Differential

The default setting is 0.5˚ F (0.25˚ C). The room temperature must change 0.5˚ F (0.25˚ C) from

the setpoint temperature before the thermostat will initiate the system in heating or cooling.

Press the or button to set the temperature

differential to your desired setting of 0.5˚, 1˚,

or 2˚ F (0.25˚, 0.5˚, or 1˚ C).

In normal operating mode, press and hold the RETURN button for 4 seconds. The LCD

display will show "d1 x", where "x" equals the ˚F / ˚C differential setting. This is the

current temperature differential setting.

Setting the First and Second Stage Differentials

Second Stage Differential

The default setting is 2˚ F (1.0˚C). This means that the room temperature must change 2˚ F

(1.0˚ C) in addition to the ﬁrst stage differential setting before the thermostat will initiate the

system in heating or cooling.

Press the RETURN button again and the LCD

display will show "d2 x", where "x" equals the

˚F / ˚C differential setting. This is the current

second stage differential setting.

4. Press the or button to set the second stage

differential to your desired setting of 2˚, 3˚,

4˚, 5˚, or 6˚ F (1.0˚, 1.5˚, 2.0˚, 2.5˚, or 3.0˚ C).

Setting Residual Cooling Fan Feature

Function Status After Reset

Operation Mode Normal Operating Mode

Temperature Hold Extended and Temporary Hold Cleared

Clock 12:00 pm, Monday

Room Temperature 70˚ F (21.0˚ C), to be renewed within

5 seconds

Setpoint Temperature According to system switch:

62˚ F (17.0˚ C) for Heat and Off

83˚ F (28.0˚ C) for Cool

Temperature Scale ˚F or ˚C dependent on switch setting

Operating Program DAY program, Monday

Low Battery Warning Off, to be renewed within 5 seconds

AC Interrupted Warning Off, to be renewed within 5 seconds

First Stage Differential 0.5˚ F (0.25˚ C)

Second Stage Differential 2˚ F (1.0˚ C)

Residual Cooling 60 Seconds

Short Cycle Protection Timer Reset

Efﬁcient Recovery Mode Reset

Output Relays Off

Extended Hold Indeﬁnite

Keypad Lock Unlocked

Adaptive Recovery Mode Reset

Residual Cooling Fan Delay 60 Seconds

Filter Check Monitor 0 days-off

Recirculating Fan Timer Reset with 120 minute off cycle

Outage Protection Timer Reset

Press the RETURN button again and the LCD display will show "FAN xx", where

"xx" equals the fan delay time in seconds during the cooling mode of operation.

Press the or button to set the residual cooling

fan delay to your desired setting of 0 (disabled),

30, 60, or 90 seconds.

7. Press the RETURN button again to return to set the

extended hold time or wait 15 seconds and the

thermostat will automatically return to normal

operating mode.

The default setting is 60 seconds. During the COOL mode of normal operation the fan

will stay on for 60 seconds after the cooling system has satisﬁed the setpoint

temperature and has turned of the compressor. This allows the system to provide higher

efﬁciency during cooling operation.

PROGRAMMING

USER SETTINGS

PROGRAMMING

USER SETTINGS

cont.

4.3.1

NOTE: If at any time while in the options setting

mode, you desire not to make any further changes,

you can wait 15 seconds without pressing any keys

to return to the normal operating mode.

4.3.2

1 2 3 4 5 6 7 8 9

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