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4. Slide the damper into the duct and secure it with the
four supplied self-drilling mounting screws. Be care-
ful to avoid over-tightening the screws as the duct
may be pulled out of round. See Fig. 3.
Fig. 3. Inserting RRD damper into duct.
WIRING
Wiring the Motor Actuator
Connect the motor to the zone control panel 18 or 20
gauge wire. The motor terminals are labeled M1 for
common, M6 for closed, and M4 for open. Connect the
motor terminals to corresponding terminals on zone
control panel for each zone. See Fig. 4–6 for hookups.
Multiple RRD dampers can be wired to one zone when
wired in parallel. See Fig. 5 for wiring multiple dampers
together in a daisy chain manner or Fig. 6 using wire nuts.
If you are exceeding the maximum number of dampers to
a zone a Slave Damper Control Relay (SDCR) must be
used. See Maximum Number of Dampers per Zone.
When more than the maximum number of dampers
allowed per panel are necessary, a SDCR must be used.
The SDCR is an isolation relay that is powered by a
separate transformer so that it relieves the panel of this
additional load. When a SDCR is used, the dampers of that
zone may either be all connected to the SDCR, or some
dampers may be wired to the SDCR and the remainder to
that zone's damper terminals.
Maximum Number of Dampers per Zone
The maximum number of dampers you can connect to a
zone panel or to a single zone will vary on the zone panel
used and the maximum temperature of the space where
the zone panel is installed. The Installation instructions
for the HZ221, HZ311, HZ322, and HZ432 zone panels
have a chart for determining how many dampers can be
used.
Fig. 4. RRD wired to zone control panel.
M23404
Fig. 5. Wiring multiple RRD dampers in daisy chain
Fig. 6. Wiring multiple RRD dampers using wire nuts.
3
RETROFIT ROUND DAMPER (RRD)
ZONE
1, 2, 3, ETC.
R Y W G C M6 M4 M1
R Y W G
ZONE
THERMOSTAT
M1
M6
M4
M23405
ZONE
1, 2, 3, ETC.
R Y W G C M6 M4 M1
R Y W G
ZONE
THERMOSTAT
M1
M6
M4
M1
M6
M4
fashion.
ZONE
1, 2, 3, ETC.
R Y W G C M6 M4 M1
R Y W G
ZONE
WIRE NUT
THERMOSTAT
M1
M1
M6
M6
M4
M4
M23407
M23410
69-1960ES—03
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