Friedrich 920-087-09 (12/10) - Manual (Page 25)

25
Remote Control Thermostat
Installation
Install Thermostat
1. Approximately.5.ft..from.the.floor.
2. Close.to.or.in.a.frequently.used.room,.preferably.on.an.inside.wall.
3. On.a.section.of.wall.without.pipes.or.ductwork.
The Thermostat should NOT be mounted:
1. Close.to.a.window,.on.an.outside.wall,.or.next.to.a.door.leading.
outside.
2. Where.it.can.be.exposed.to.direct.sunlight.or.heat,.such.as.the.sun,.
a.lamp,.fireplace,.or.any.ther.temperatureradiating.object.which.
may.cause.a.false.reading.
3. Close.to.or.in.the.direct.airflow.of.supply.registers.and/or.return.
air.grilles.
4. Any.areas.with.poor.air.circulation,.such.as.a.corner,.behind.a.
door,.or.an.alcove.
Remote Thermostat and Low
Voltage Control Connections
Remote Thermostat
All.Friedrich.PD.model.PTAC.units.are.factory.configured.to.be.controlled.
by.either.the.chassis.mounted.Smart.Center.or.a.24V.remote.wall.mounted.
thermostat..The.thermostat.may.be.auto.or.manual.changeover.as.long.as.
the.control.configuration.matches.that.of.the.PTAC.unit.
NOTE:. All.PDE.models.require.a.single.stage.cool,.single.stage.heat.
thermostat...All.PDH.models.require.a.single.stage.cool,.dual.
stage.heat.thermostat.with.an.O.reversing.valve.control...The.
Friedrich.RT6.thermostat.can.be.configured.for.either.model.
FRP029 FRP029
Figure 33
Control board with optional PDXRT escutcheon kit installed
To control the unit with a wall mounted thermostat
follow the steps below:
1. Unplug.the.unit.before.doing.any.work.
2. With.the.front.cover.removed.locate.the.dip.switches.located.below.
the.Smart.Center.control.panel..See.page.23...Switch.Dip.switch.
2.to.the.up.on.'ON'.position.
3. Remove.the.low.voltage.terminal.block.from.the.unit.
4. Connect.the.corresponding.terminals.from.the.wall.thermostat.to.
the.terminal.block.
5. Replace.the.terminal.block.on.the.unit.
6. Restore.power.to.the.unit.
7. The.unit.is.now.controlled.by.the.wall.thermostat.only..
8. If.the.accessory.escutcheon.kit.(PDXRTA).is.to.be.used,.install.it.
over.the.existing.control.panel.
NOTE:. The.unit.mounted.controls.no.longer.control.the.unit...To.restore.
the.unit.mounted.controls.move.dip.switch.2.to.the.down.or.
'OFF'.position.
Thermostat Connections
R.. =..24V.Power.from.Unit
Y.. =..Call.for.Cooling
W.. =..Call.for.Heating
O.. =..Reversing.Valve.Energized.in.cooling.mode.(PDH.Models.Only)
GL.=..Call.for.Low.Fan
GH.=.Call.for.High.Fan
C.. =..Common.Ground
*If.only.one.G.terminal.is.present.on.thermostat.connect.to.GL.for.low.
speed.fan.or.to.GH.for.high.speed.fan.operation.