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Mode Control
The mode control pad(s) allow the selection of the operating
modes of the unit.
There is a two second delay before the mode activates its
appropriate relay.
OPERATING SEQUENCE / CHARACTERISTICS
AND FEATURES
Compressor Operation
The run state of the compressor is determined by the
difference between the indoor ambient temperature and
the set temperature. See specic mode of operation for
details.
Compressor Time Delay: 180 seconds
This feature is initiated every time the compressor is de-
energized, either due to:
(1) satisfying the temperature set point
(2) changing mode to fan only
(3) a power interruption or
(4) turning the unit off
The compressor is also time delayed for 3 minutes when the
control is rst plugged in or power is restored after failure.
When the compressor cycles off as a result of satisfying the
“load”, the time delay is typically timed out during the off
cycle. Compressor time delay is bypassed by “Test Mode”.
Return Air Temperature Sensor
The control range is 60°F to 90°F +/- 2.0°F.
Frost Protection Sensor
Temperature settings:
Disable the compressor when sensing 30 +/- 3°F for 2 min.
continuously.
Enable compressor @ 55 +/- 5°F.
The fan should not be affected by the Frost Protection. It
should continue to function normally if freeze protection is
called for.
COOL Mode for SS, SM and XQ Models
When in the COOL mode, the control will turn on the
compressor when the indoor temperature is 1.5°F above the
set point and turn off the compressor when the ambient gets
below the set point by 1.5°F. The fan will run continuously.
MONEY SAVER Mode
When in MONEY SAVER mode, the system will be turned
on when the indoor temperature gets above the set point
by 0.75°F and turns off when the indoor temperature gets
below the set point by 0.75°F. The fan will turn on 5 seconds
before the compressor and turn off 5 seconds after the
compressor stops. If the compressor is delayed the fan
will continue to run while the compressor restarts. If the
ELECTRONIC CONTROL SEQUENCE OF OPERATION
QME AND XQ MODELS
thermostat remains satised for more than approximately 9
minutes, the fan will turn on for a period of 90 seconds for
air sampling. Operation in MONEY SAVER mode will light
both the MONEY SAVER and COOL indicators.
FAN ONLY Mode
When in the FAN ONLY mode, the compressor will not
operate. The fan will run continuously at the user-selected
speed (see “Fan Speed Set” below). Smart Fan is not
available in FAN ONLY Mode.
Fan Speed Set
SS/SM fan speed is changed by pressing SPEED 1-4
pad and scrolling through F1, F2, F3, and F4 in the digital
display.
XQ fan speed is changed by pressing FAN SPEED pad
and scrolling through F1, F2, F3 and SF (Smart Fan) in the
digital display.
There will be a 2 second delay before the fan speed changes
to prevent unnecessary switching of the relays during fan
speed selection.
SMART FAN
On the SS/SM models, smart fan is activated by pressing
the SMART FAN button. On the XQ model, smart fan is
activated by pressing the FAN SPEED button and scrolling
through speeds until “SF” appears in the digital display.
Using the remote control, Smart Fan is selected by the
fourth push of Fan Speed button.
Smart fan changes fan speeds based on the temperature
differential between the ambient and set temperatures.
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PROGRAMMABLE