15
Remote Thermostat and Low Voltage Control Connections
Remote Thermostat
To connect the wall-mounted thermostat:
1) Pull the disconnect switch.
2) Unscrew and remove the control box panel.
3) After selecting which side you want to run your thermostat
wire through, run the wires through the side hole in the box
to reach the connection terminal for the wiring.
4) Make the wire connections, appropriately matching the
wires as shown in the wiring diagram.
5) Once each wire is matched and connected, the unit is now
ready for operation.
6) Reattach the control box cover.
Desk Control Terminals
Maximum Wire Length for Desk Control Switch
Wire Size
Maximum Length
#24
400 ft.
#22
600 ft.
#20
900 ft.
#18
1500 ft.
#16
2000 ft.
Thermostat Connections
C = Common Ground
W = Call for Heating
Y = Call for Cooling
R = 24V Power from Unit
GL = Call for Fan (Low Speed)
GH = Call for Fan (High Speed)
B = Reversing Valve Energized in heating mode
All Friedrich Vert-I-Pak units are factory configured to be con-
trolled by using a single stage heat/cool remote wall mounted
thermostat.
The thermostat may be auto or manual changeover as long as the
control configuration matches that of the Vert-I-Pak unit.
The Friedrich VERT-I-PAK 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 17).
Whenever the switch closes, the unit operation will stop.
NOTE
: The desk control system and switches must be field
supplied.
Other manufacturer’s units and even older Friedrich models
may have different control wiring connections. Questions
concerning proper connections to the unit should be directed to
the factory.
Improper connection of the thermostat
control wiring and/or tampering with the
unit's internal wiring can void the
equipment warranty and can result in
property damage, personal injury and/or
death.
Electrical shock hazard.
WARNING
Control Board
Figure 17
