Friedrich 920-087-09 (12/10) - Manual (Page 23)

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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.
Digital Control User Input Configuration
Switch Description Function Factory Setting Option
1 Emergency.Heat.Override.
for.PDH.Heat.Pump.
Models
Enables.electric.heat.only.operation.in.the.event.of.a.com-
pressor.failure.on.HP.models.
Down.-.Normal.Operation Up.-.Overrides.compressor.operation..
(PDH.models.only)
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.
not.fall.below.40F.even.when.turned.off. Down.-.Freeze.Protection.Enabled Up.-.Freeze.Protection.Disabled
FRP028
DIP SWITCH
LOCATION OF
DIP SWITCHES
ON UNIT
1 2 3 4 5 6 7
Freeze guard
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)
UP
DOWN
High
Med
Low Fan
Cool
Heat
Fan Spee d Mode Temperature
Power
Figure 31
Dip Switches
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.
Dip Switch Setting