Certified Drawing
OM 813
PTAC Digital Controls
Page 5 of 8
Unit Operation
Last Setting Memory Backup
The digital control will start with the last settings used prior to
power down. These settings are saved in a not-volatile memory
and the default mode is
OFF
.
On/Off Triggering
The Control can be turned On or Off via the touch pad. The
Control will show the temperature set point when turned on.
In the Fan Mode, the display is blank.
1.
On/Off triggering with the touch pad:
Control will turn ON or OFF when the On/Off button is
pressed on the touch pad control. Once turned on, the
control will start on the last mode used before it was turned
OFF.
2.
On/Off triggering with the SLEEP Feature:
The SLEEP Feature works in combination with the Timer
Setting. Sleep Timer setting is adjustable from 1 to 15
hours via the touch pad. The Timer counts down to “0”
and turns the Control OFF if it was previously ON or vice
versa.
NOTE:
Sleep Operation is overridden by the room freeze
protection.
OFF Mode
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. The normally open hydronic valve will be powered
closed in the OFF MODE.
Temperature Range
The maximum operating temperature range is selectable via
the Touch Pad and is 60°F to 85°F.
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 touch pad. It can also be set
for Continuous or Cycled operation on the touch pad. 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 30 minutes off, until the next cut-
in cycle.
•
With a single (1) motor PTAC:
The outdoor motor speed is determined by the indoor fan
speed.
•
With a (2) two motor PTAC:
The compressor and the outdoor fan are controlled
simultaneously.
Damper Control
Damper control is user selectable via a jumper on the board for
one of two modes:
1)
Automatic
when the jumper is
present. The control is
shipped with the jumper on.
In the
Automatic Mode,
the damper will open when the indoor
fan is operating and close when it is not.
2)
In the
Manual Mode
the damper is opened and closed
manually.
Wireless Remote Control (Optional)
To add to existing Digital Control units, codes 55, 56
or 57, Front Panel Part No. 668104501 and Infrared
Control Kit Part No. 107029001 must be ordered.
The Remote Consists of 10 Push-buttons
•
Power:
Functions same as ON/OFF button on the touch pad.
•
Sleep:
Functions same as SLEEP button on the touch pad.
Mode Buttons
•
Heat, Cool, Cool/Dry, Fan:
Performs same function as the MODE button on the touch
pad, and allows user to select specific mode of operation
using only one button.
•
Temp Buttons
+,
– :
Functions same as buttons on touch pad, allowing user
to change the setpoint.
•
Fan Speed Buttons (High & Low):
Performs same function as the FAN SPEED button on the
touch pad, allows user to select specific speed using only
one button.
Remote must be aimed in a line of sight of the window in upper
right corner on the front panel, at less than a 45
o
angle from
center of the window.
The control board will beep when any button is pressed on
the remote control to confirm signal.
