C - A 8
TCONT900AC43UA Installer’s Guide
4 Heat/3 Cool/ Heat Pump
Communicating Programmable 3-Wire Hookup
(A/T)CONT900AC43UA Installer Guide
Figure 6
Installer setup (ISU)
The Comfort Control works with many different sys-
tem types. The installer can use the Installer Setup
menu to change factory settings to customize instal-
lations (See Table 4.)
Entering installer setup
Follow these steps to enter the Installer Setup:
Step 1
Be sure the Comfort Control is powered. If neces-
sary, press the Done key to return to the home screen.
Step 2
Press and release the system key.
Step 3
Press and hold the two blank keys on either side of
the center key for approximately five seconds until
screen changes (See Figure 7.)
Step 4
Release the two blank keys when the screen on the
Comfort Control matches the screen in Figure 8 (See
Figure 8.)
Figure 7
Figure 8
Step 5
See Figure 8 to review how the Comfort Control keys
are used during Installer Setup (See Table 4, Pages
9-17) for the Installer Setup numbers and settings.
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