Remote Thermostat; Desk Control Terminals; Auxiliary Fan Control; Control Board - Friedrich VERT-I-PAK A Série Manuel D'installation Et D'utilisation

Remote Thermostat and Low Voltage Control Connections

Remote Thermostat

All Friedrich Vert-I-Pak units are factory configured to be
controlled by using a single stage heat/cool remote wall moun-
ted thermostat. The thermostat may be auto or manual chan-
geover as long as the control configuration matches that of the
Vert-I-Pak unit.
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

The Friedrich VERT-I-PAK has built-in provisions for connec-
tion to an external switch to control power to the unit. The
switch can be a central desk control system or even a norma-
lly 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
15). Whenever the switch closes, the unit operation will stop.
NOTE: The desk control system and switches must be
field supplied.
Maximum Wire Length for Desk Control Switch
Wire Size
#24
#22
#20
#18
#16

Auxiliary Fan Control

The Smart Center also has the ability to control a 24VAC relay
to activate an auxiliary, or transfer, fan. The outputs are listed
as F1 and F2 on the control board.
To connect the relay, simply wire one side of the relay to F1
and the other side to F2. Anytime that the fan runs, the
terminals will send a 24VAC signal to the relay. The relay must
be 24VAC, 100mA or less.
NOTE: The relay and auxiliary fans must be field supplied.
Maximum Length
400 ft.
600 ft.
900 ft.
1500 ft.
2000 ft.
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 and may result in property damage,
personal injury or death. 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.

Control Board

Figure 14
Interface Definition
Terminal Code
C
GH
GL
B
Y
W
R
Wire Connection Function
Common Ground Terminal
Call for High Fan
Call for Low Fan
Call for Heat Pump Reversing Valve
Call for Compressor
Call for Heating
24V Pow er from Electronic Control to Wall
Thermostat
13