User Guide
EXPANSION PANELS (OPTIONAL – MODEL 6404 ONLY)
Up to four expansion panels, each with 2 zones, can be added to the zone panel if additional zones are required.
To add Model 6401 expansion panels, follow these steps:
1. Disconnect the Power and Damper Power on the zone panel until installation is complete.
2. Mount the expansion panels using four #8 screws (supplied) in location where temperature will not exceed 158°F and will not drop below freezing
32°F. Do not mount on foundation walls, or on the supply of the HVAC equipment.
3. Connect the R, C, A and B terminals labeled EXPANSION on the zone panel to the R, C, A and B terminals labeled EP_IN on the first 6401
expansion panels, connect the R, C, A and B terminals labeled EP_OUT on the first expansion panel to the terminals labeled EP_IN on the next
expansion panel. See FIGURE 15. Polarity is important. If wired incorrectly control panel power and/or communications will be affected. Use wire
color as a means to ensure the terminals are connected correctly.
4. Connect a dedicated
transformer to the DAMPER
POWER terminals on the first
6401 expansion panel. For
additional panels, damper
power can be daisy chained
as shown in Figure 13.
5. Wire dampers to the 6401
expansion panel(s) as
previously described in the
ZONE DAMPER WIRING
section.
6. Wire the thermostats to the
6401 expansion panel(s). Use
the same thermostats as were
selected for zones 1-4 on the
zone panel.
7. Address each 6401 expansion
panel. Each expansion panel
must have its own unique
address, 1 through 4, or
communications cannot be
established between the zone
panel and the expansion
panel.
8. Maximum distance of the
expansion panel from the
zone panel is 50 feet.
24 VAC
120 VAC
TRANSFORMER #3
DEDICATED
FUSE
EXPANSION ZONE 1
SPARE FUSE
NC
NO
COM
C
R
B
A
EP_OUT EP_IN
POWER
DAMPER
C
R
B
A
R
C
ADDRESS
POWER
NC
NO
COM
R
R
1
4
3
2
2S
G
O
Y
W
C
2S
G
O
Y
W
C
EXPANSION ZONE 2
DAMPER 1
DAMPER 2
THERMOSTAT INPUT TERMINALS
MODEL 6401 – ADDRESS #1
FUSE
EXPANSION ZONE 1
SPARE FUSE
NC
NO
COM
C
R
B
A
EP_OUT EP_IN
POWER
DAMPER
C
R
B
A
R
C
ADDRESS
POWER
NC
NO
COM
R
R
1
4
3
2
2S
G
O
Y
W
C
2S
G
O
Y
W
C
EXPANSION ZONE 2
DAMPER 1
DAMPER 2
THERMOSTAT INPUT TERMINALS
MODEL 6401 – ADDRESS #2
(6401)
PANEL
EXPANSION
OUT TO NEXT
x1
DAMPER
x2
DAMPER
x1
DAMPER
x2
DAMPER
90-2097
FIGURE 15 – EXPANSION PANEL WIRING
English 9
61001165A 6403-6404 Zoned Comfort Control Install.indd 9 11/3/15 2:55 PM