ELECTRONIC CONTROL SEQUENCE OF OPERATION QME PROGRAMMABLE AND XQ MODELS
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 specific 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 first 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
thermostat remains satisfied 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
Fan Speed Set
SS/SM fan speed is changed by pressing SPEED
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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