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.
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.
Figure 33
Control board with optional PDXRT escutcheon kit installed
FRP029
25
