Installation and Operation Manual

Desk Control Terminals

The Friedrich PD model PTAC has built-in provisions for connection to an

external switch to control power to the unit. The switch can be a central

desk control system or even a normally open door switch.

For desk control operation connect one side of the switch to the D1 terminal

and the other to the D2 terminal (See Figure 31, Page 23). Whenever the

switch closes the unit operation will stop.

NOTE: The desk control system and switches must be eld supplied.

Energy Management

Sometimes known as Front Desk Control, an input is provided so that the

unit can be manually disabled from a remote location. If the unit detects

24Vac on this input, it will automatically turn itself off. If no voltage is

detected on the input , the unit will run normally.

NOTE: It is the installer's responsibility to ensure that all control wiring

connections are made in accordance with the installation

instructions. Improper connection of the thermostat control

wiring and/or tampering with the unit's internal wiring can

void the equipment warranty. Other manufacturer's PTACs

and even older Friedrich models may have different control

wire connections. Questions concerning proper connections

to the unit should be directed to Friedrich.

WARNING

Electrical Shock Hazard

Turn off electrical power before service

or installation.

ALL electrical connections and wiring

MUST be installed by a qualified

electrician and conform to the National

Code and all local codes which have

jurisdiction.

Improper connection of the thermostat

control wiring and/or tampering with the

units internal wiring may result in property

damage, personal injury or death.