IM 934-2 Applied PDAA/PDHA / Page 21 of 44
Controls
Standard Digital Touchpad Control
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.
Remote T’Stat Mode
The unit can be jumper configured 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 board
the work of the compressor, indoor and outdoor
fans, the reversing valve, and the heater
2. System will run in Cool mode when Y signal is
high. In cool mode compressor (therefore
outdoor fan) shall turn on
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 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.
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 Set-up menu.
