# 45465K005
Page 18
Figure 24
Wiring Connections for Twinning G2D80BR and G2D80BT Furnaces
Two Stage Heating/Two Stage Cooling
Figure 25
Wiring Connections for Twinning G2D80BR and G2D80BT Furnaces
Two Stage Heating/Single Stage Cooling
G2D80CR and G2D80CT Models
– To twin two G2D80CR
or G2D80CT furnaces, connect wires as shown in either
Figure 24 or Figure 25.
NOTE: If a single stage thermostat is used, move the
automatic heat staging jumper pin (see Figure 23 on
page 17) from the NONE position to either the 5 or 10
minute setting. Connect rest of wiring as shown in
Figure 24 or Figure 25 except in this single stage stat
configuration, the W2 must remain open (only W1
should be connected).
If the red LED on the control board flashes a “9 flash” fault
code after the units are energized (see Table 6 on page 26),
switch 24V leads on the transformer in one of the units to
bring both transformers into phase.
