GMVC9 GCVC9 Installation Instructions

42
24VAC transformer must be installed in the outdoor unit to pro-
vide 24VAC power to the outdoor unit’s electronic control. See
instruction manual provided with the thermostat for wiring
instructions.
NOTE: Use of a transformer is recommended if installing a dual
fuel/fossil fuel system with a CTK01* or CTK02*. Failure to use
the transformer in the outdoor unit could result in over loading of
the furnace transformer. Follow the thermostat manufacturers
recommendation on when an outdoor transformer is needed.
Do not attempt to install an outdoor transformer when using
an inverter type unit.
12RC
12RC
CTK0*
Thermostat
ComfortNet Compatible
Furnace Integrated
Control Module
ComfortNet Compatible
AC/HP Integrated
Control Module
40VA Transformer
208/230 VAC
24 VAC
1
2
R
C
System Wiring using Two-Wires between Furnace and AC/HP
and Four-Wires Between Furnace and Thermostat
Figure 55
COMFORTNET™ COMPATIBLE FURNACE WITH NON-COMFORTNET
COMPATIBLE
SINGLE-STAGE AIR CONDITIONER
Four wires are required between the furnace and thermostat.
Two wires are required between the furnace control and single
stage air conditioner. For this system configuration, the “Y1”
terminal on the integrated furnace control becomes an output
rather than an input. The “Y1” connection to the outdoor unit is
made using both 4-position thermostat connectors in the CTK0*
kit. Remove the red keying tabs from the on-board connector
block and position both 4-position connector such that “1”, “2”,
“R”, “C”, and “Y1” positions are filled.
NOTE: The cooling CFM for this installation must be set up at
the communicating thermostat through ComfortNet >furnace
menu > non com menu
12RC
C Y
ComfortNet Compatible
Furnace Integrated
Control Module
CTK0*
Thermostat
Non- Compatible
Single Stage AC
ComfortNet
G
W1 W2 Y1 Y2
O
12RC
4-Position Connectors
from CTK0*
Thermostat Kit
System Wiring between Furnace and Non-Communicating Compatible
Single Stage Air Conditioner
Figure 56
COMFORTNET SYSTEM ADVANCED FEATURES
The ComfortNet system permits access to additional system in-
formation, advanced setup features, and advanced diagnostic/
troubleshooting features. These advanced features are orga-
nized into a menu structure. The menus are accessed and navi-
gated by means of the CTK0* thermostat. For details, see
the thermostat instruction manual.
PCBKF105 IFC has the added feature of 24 VAC input to G
terminal when using a communicating thermostat. ERV/HRV
and other accessories can send a signal to the G terminal
and energize the continuous fan. The continuous fan speed
can be adjusted on switch bank S5, DIP switch 3 & 4. The 24
VAC source must originate from the R terminal of furnace.
W1 W2 Y1 Y2 O DEHUM
24 vac "G" input to Furnace
Integrated Control module From
ERV / HRV or Similar Devices
1
1
2RC
2
Furnace Integrated
Control Module
RC
G
CTK0* Thermostat
4-Pin (X2), 7 Pin, or 9 Pin Connecto
r
Diagram 1