Digital Control User Input Conﬁguration

920-087-04

Digital Control User Input Conﬁguration

The adjustable control dip switches are located at the lower left hand portion of the digital Smart Center. The inputs are only visible and accessible with the front cover removed from the PTAC.

Dip Switch Setting

Heating Range Switches 1 & 2

1) Electronic Temperature Limiting – Switches 1-4

The digital control is set from the factory to allow a tempera- ture range between 60°F and 90°F in both heating and cooling mode. Dip Switches 1-4 can be used to set high and low limits for either heating or cooling or both.

From the factory all four switches are in the up ‘ON’ position. The charts to the right show the available electronic limiting ranges.

Temperature

Range

Low	High
60	90
60	87

6084

6081

	Dip
	Switch

1		2
On		On
Off		On
Off		Off
On		Off

2) Fan Cycle Control – Switch 5

All PTACs are shipped from the factory with Dip Switch 5 in the

Cooling Range Switches 3 & 4

‘OFF’ position to cycle the fan only when there is a demand for the compressor or heater. As an option the fan may be set to ‘continuous’ mode by switching Dip Switch 5 to ‘ON’ position to run the fan continuously while the unit is powered on.

To ensure that the room temperature is maintained evenly while in fan cycle mode the Even Temp Load Anticipation feature is enabled. Quiet Fan Delay is also enabled in fan cycle mode to lessen the acoustical change between compressor start up and shut off by running the fan for 5 seconds before each demand cycle, and 30 seconds after cooling or 15 seconds after heating cycles.

Temperature

Range

Low	High
60	90
63	90

6690

6990

Dip

Switch

On On

On Off

Off Off

Off On

3) Room Freeze Protection – Switch 6

Units are shipped from the factory with the room freeze protection disabled. Room Freeze Protection can be switched on at the owner’s preference by moving Dip Switch 6 to ‘ON’. This feature will monitor the indoor room conditions and in the event that the room falls below 40°F the unit will cycle on high fan with the electric heater. This occurs regardless of mode.

4) Emergency Heat Override – Switch 7

In the unlikely event of a compressor failure a heat pump unit may be switched to operate in only the electric heat mode until repairs can be made. Moving Dip Switch 7 to ‘ON’.

Note: PTAC must be disconnected from power supply when making any conﬁguration changes.

Figure 11

Factory Dip Switch Conﬁguration

O	1	2	3	4	5	6	7	8
O
N

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