Friedrich 920-087-09 Digital Control User Input Configuration, Dip Switch Setting, Dip Switches

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

1.Emergency Heat Override – Switch 1

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 1 to ‘ON’.

2.Wall Thermostat Switch 2

In order to enable the wall thermostat move Dip Switch to 'ON'.

3.Fan Cycle Control – Switch 3-4

All PTACs are shipped from the factory with Dip Switch 3-4 in the ‘OFF’ position. In this position the cooling fan cycle will run continuously providing air circulation during the warm months. The heating fan cycle is set to 'cycle' on and off. The fan may be set to 'continuous' mode by switching Dip Switch 3 to 'ON' position.

4.Electronic Temperature Limiting – Switches 5-6

The digital control is set from the factory to allow a temperature range between 61° F and 86° F in both heating and cooling mode. Dip Switches 5-6 can be used to set high and low limits for either heating both, cooling both or both.

From the factory switches are in the down 'OFF' position. The chart below shows the available electronic limiting ranges.

5.Room Freeze Protection – Switch 7

Units are shipped from the factory with the room freeze protection enabled. Room Freeze Protection can be switched off at the owner’s preference by moving Dip Switch 7 to ‘OFF’. 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.

Figure 31

Dip Switches

DIP SWITCH

UP

1 2 3 4 5 6 7 DOWN

				LOCATION OF
		Freeze guard		DIP SWITCHES
				ON UNIT
		Setpoint Limit 2
		Setpoint Limit 1
		Fan CON/CYC for cooling
		Fan CON/CYC for heating
		Wall Thermostat enable
		Electric heat only (for Heat Pumps)
										FRP028
Switch	Description	Function	Factory Setting				Option
1	Emergency Heat Override	Enables electric heat only operation in the event of a com-	Down - Normal Operation				Up - Overrides compressor operation.
	for PDH Heat Pump	pressor failure on HP models.					(PDH models only)
	Models
2	Wall Thermostat Switch	Enables the use of a wall thermostat or unit controls	Down - Unit Controls				Up - Enables Wall Thermostat Usage
3	Fan Cycle for Heating	Allows selection of continuous fan or cycling in heating mode.	Down - Cycle				Up - Continuous
4	Fan Cycle for Cooling	Allows selection of continuous fan or cycling in cooling mode.	Down - Continuous				Up - Cycle
5	Setpoint Switch 1	Allows the temperature setpoint range to be adjusted.	Down	61F-86F	Up	63F-80F	Down	65F-78F	Up	68F-75F
6	Setpoint Switch 2		Down	(16C-30C)	Down	(18C-28C)	Up	(19C-26C)	Up	(20C-24C)
7	Room Freeze Protection	Allows the unit to ensure the indoor room temperature does	Down - Freeze Protection Enabled				Up - Freeze Protection Disabled
		not fall below 40F even when turned off.

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