IM 882 / Page 16 of 36
Controls
Standard Digital Touchpad Control
Temperature Range
The maximum operating temperature range is selectable
via the Touchpad and is 60°F to 85°F, with the limits
included. The Remote Thermostat selectable operating
range is 60°F to 90°F with limits included. The range is
set in the Configuration Mode.
Indoor and Outdoor Fan Operation
The indoor fan can be set to operate on High or Low
speed with the Fan Speed Button on the touchpad. It
can also be set for Continuous or Cycle operation on the
touchpad. When set for Continuous, the “CONT” LED
will be on and the fan will run continuously. When set
for Cycle, the “CYCLE” LED will be on and the fan will
turn on at a call for heat or cooling.
Fan Cycle Operation
On a call for Heating or Cooling, the indoor fan and
the heating source or the compressor will be activated.
When the call is satisfied and the heating source or the
compressor is deactivated, the indoor fan will repeatedly
run for 2 minutes on and the number of minutes selected
on the PC Board off, until the next cut-in cycle. The
number of cycles with timing as described above is
determined based on the OFF FAN CYCLE jumper
setting on the unit control board.
Remote Thermostat Mode
The unit can be jumper configured on the unit control
board to take commands from a Remote Thermostat. The
Remote Thermostat will call for Heat and Cool through
the electronic controller.
1. The Remote T’stat will control through the unit
control board the work of the compressor, indoor and
outdoor fans, the reversing valve, and the heat
control valve.
2. In Cool mode the compressor and condenser fan
shall turn on when "Y" signal is high.
3. Cold start feature (see Modes of Operation – Cold
Start), Cool dry mode (see Cold Dry Mode) and
Sleep feature (see Sleep Feature) are not available
in Remote T’stat cool mode
Operation
Memory Recall
The digital control shall start with the last settings used
prior to power down. These settings are saved in a non-
volatile memory. Factory set mode is OFF.
On/Off Triggering
Control can be turned On/Off via the Local User
Interface (LUI), Remote T’stat, or Sleep feature. The
control will show the temperature set point when the
mode is Cool, Cool Dry, or Heat. The display will be
blank in Fan mode.
1.
On/Off triggering with LUI
Control shall turn On or Off when the On/Off
button is pressed in LUI. Once turned on control
shall start on the last mode used before it was
turned Off.
2.
On/Off triggering with the Remote T’stat
Control shall be turned On if it was Off from the
Remote T’stat when it is set up to be controlled by
a Remote T’stat. A call for heat or cool from the
Remote T’stat will be used to turn the control on.
Control remains on until manually turned Off.
3.
On/Off triggering with the Sleep feature
Sleep feature works in combination with the Timer
setting. Sleep time setting shall be user adjustable
from 1 to 15 hours via the Touchpad. The timer
will count down and when it reaches “0” it will
turn the control Off if control was previously On
and vice versa, if it was Off it will turn On after
time expires. As mentioned in
protections
section
of this spec the Sleep operation is overridden by
room freeze protection.
Control Off
When the control is in the Off Mode, relay outputs will
be disabled with the exception of the indoor fan (blower).
It will stay on to meet the Hot Keep specification.
Indicator LED’s are all off.
