User Guide

WIRING
WARNING
120 volts may cause serious injury from electrical shock. Sudden operation
may cause serious injury from moving parts. Leave power disconnected
until installation is complete.
Follow these steps for all system connections. Wiring will vary depending on
equipment.
See page 11 for complete wiring diagram examples.
Wiring of the zone panel must comply with applicable codes, ordinances and
regulations.
• Use only 18 or 20 gauge solid (non-stranded) wire.
• Strip off 7/16" of insulation from the wire.
• Push wire into the terminal of the zone panel.
• To release the wire, press down on the top of the terminal and pull the wire out.
• The zone panel supports multiple options to route and anchor wires to the
housing. See FIGURE 6.
WIRE TIE MOUNTS
TRANSFORMER #1
DEDICATED
24 VAC
120 VAC
24 VAC
120 VAC
TRANSFORMER #2
DEDICATED
90-2073
90-2092
90-2093
FIGURE 6 – WIRE TIE MOUNTS
FIGURE 7 – TRANSFORMER #1
FIGURE 8 – TRANSFORMER #2
SELECT AND WIRE THE TRANSFORMER TO THE CONTROL PANEL
1. Two separate 24-volt transformers are required for the
system. The HVAC Equipment transformer cannot be used
for power. Transformer #1 is used to power the zone panel
and thermostats. Transformer #2 is used to power the
zone dampers.
2. Wire 24VAC from Transformer #1 to the POWER, R & C
terminals (see FIGURE 7) .
3. Wire 24VAC from Transformer #2 to the DAMPER POWER,
R & C terminals (see FIGURE 8).
4. Sizing Transformer #2:
a. Add up all the zone dampers that are in the system.
b. Subtract the number of dampers in the zone with the
least number of dampers.
c. This is the most number of dampers that could be
energized at one time. Multiply this number by 10 to
determine the transformer size.
Example: If you have a 4-zone system, and there
are two dampers per zone, then the total number of
dampers that could be energized at one time is,
8 - 2 = 6 dampers
6 dampers x 10VA per damper = 60VA required
d. Select a transformer that meets or exceeds the value
calculated.
6 English
61001165A 6403-6404 Zoned Comfort Control Install.indd 6 11/3/15 2:55 PM