Operating instructions

IM 950-1 / Page 17 of 38
System Select Operation Using Remote
Thermostat
System will run in Heat mode and engage certain
outputs based on the system selection (jumper) as
described below (see Standard Digital Control Board
Wiring Diagram on page 31).
AC/ELE
• If AC/ELE is selected then a signal on W
terminal will call for heating.
HP or HP/ELE
• If HP or HP/ELE is selected then signals on Y
and B terminals will call for heating.
NOTES:
1. Hot start and Sleep features are not available in
Remote T’stat heat mode.
2. Control’s operation is subject to its own protection
features when controlled by a Remote T’stat
3. Indoor fan mode and the speed will default to
“cycle” and “high” when unit is controlled by
Remote T’stat
4. The indoor fan is turned on when G signal is high.
When there is no signal on G terminal then the
indoor fan will be turned off.
Control Lockout Feature
The control is placed in a lockout mode of
operation when Mode button is held pressed for 10
seconds. Display will show “LC” to conrm Lockout
Mode has been entered. Once in this Lockout Mode
the control board will not take any commands at all. In
Lockout, unit will continue to operate with the same
settings just prior to Lockout Mode. This means the
touchpad will no longer be able to pass commands
to the control. User’s set point will normally be
displayed. Any button pushed will bring “LC” on
display for ve seconds.
To exit the Lockout Mode and return to normal
(regular) mode of operation, press the Mode button for
10 seconds. Display will show “nL” for ve seconds to
conrm normal mode has been resumed.
Controls
Standard Digital Touchpad Control
Modes of Operation
Cool Mode
In Cool Mode, the compressor will start if the
temperature at the space temperature sensor is 1°F
or higher than the set point. It will stop if the space
temperature sensor is 2°F or lower than the set point,
subject to timing requirements.
In the Cool Mode, the indoor fan will operate
according to the user settings for Fan Mode –
Continuous or Cycle and Speed.
Cold Start
Cold start is initiated when the control has not
called for cooling for more than two (2) hours or
during a power-on-reset. During cold start, the set
point is lowered by 4°F (Tset-4°F) if the differential
calls for cooling. The unit will operate in cold start
until the new set point is satised (+ or – 1°F) or until
the unit has run in cold start for at least 20 minutes.
After one or both conditions are met, the set point will
be reset to the user setting and the unit will run in the
regular cool mode.
The indoor fan will operate according to the user
settings for mode – Continuous or Cycle and Speed.
Cold start is not available with the Sleep feature.
Sleep Function
Sleep time is adjustable by the user from 1 to 15
hours in one (1) hour increments in a closed loop. The
sleep time is adjusted and set via the touchpad and by
pressing the Sleep Button repeatedly. On the touchpad,
the display will show the set time in numbers for ve
(5) seconds. Before the sleep time expires, the setting
can be adjusted above the number of hours passed by
pressing the Sleep Button. Pressing the On/Off Button
can terminate the Sleep Mode.
A changeover from Heat to Cool or another Mode
will reset the Sleep Timer.
The Sleep Function will be deactivated by pressing
the power-on-reset or any button (except sleep) on the
touchpad or the Remote Control.