Multiple Section Damper Wiring; Maximum Assembly Tables - Greenheck DFD Series Installation, Operation And Maintenance Manual

Figure 5: Single sleeve around outside with support
mullion

Multiple Section Damper Wiring

Dampers greater than 84 in. (2134mm) high will ship in
two ship sections. Conduit whips from ship section will
need to be wired to junction box on ship section with
the closure device (see Figure 7).
When fire and fire smoke dampers are ordered with an
open/close blade position indicating device (included
with the OCI, RRL/OCI, and TOR accessories) one
device is provided per row of damper sections. For
example, a two section high damper assembly will be
provided with two open/closed indicating devices.
Note that all damper sections on a given row are
operated by a single jackshaft and thus forced to
operate in unison. On two section high dampers,
although the two open/closed indicators are not factory
wired together, it is common industry practice to field
wire the two open switches in series and the two closed
switches in series so that the system monitoring the
damper will detect a fault if either row of dampers fails
to reach the end of stroke condition.

Maximum Assembly Tables

Horizontal Mount
Maximum Single
Damper Model Section Size
DFD-210 36 x 36 or 32 x 50
DFDAF-310
FSD-211, 212, 213 36 x 48 or 32 x 50
FSD-211M, 212M
FSD-231M
FSD-311, 312
FSD-311M, 312M
FSD-331, DFDAF-330
IMO-310
IMO-311
SEDFD-210,
SEFSD-211
SSFSD-211
Note: FSD model dampers fitted with a fusible link closure device are limited to single section sizes.
Support mullion:
14 ga. 5 in. wide for
vertical mount dampers;
12 ga. 9 in. wide for
horizontal mount dampers
Maximum
Overall Size for
Multi-Section
(inches) Dampers
(inches)
128 x 96
32 x 50 144 x 96
144 x 96
30 x 36 144 x 72
36 x 36 72 x 48
32 x 50 144 x 96
32 x 50 128 x 96
30 x 48 144 x 96
32 x 50 NA
32 x 50 NA
24 x 30 48 x 30
24 x 30 48 x 30
Figure 6: Two individually sleeved units with no mullions
Figure 7: Multiple section damper wiring
Vertical Mount
Maximum Single
Damper Model Section Size
DFD-210 36 x 36 or 32 x 50
DFDAF-310
FSD-211, 212, 213 36 x 48 or 32 x 50
FSD-311, 311M,
312, 312M
FSD-311V
FSD-331, DFDAF-330 32 x 36 or 30 x 48
IMO-311
SEDFD-210,
24 x 30 or 22 x 36
SSDFD-210
SEFSD-211
24 x 30 or 22 x 36
SSFSD-211
Multi-Blade Fire and Combination Fire Smoke Dampers
Maximum
Overall Size for
Multi-section
(inches) Dampers
(inches)
128 x 100
32 x 50 128 x 100
128 x 100
32 x 50 128 x 100
50 X 32 100 x 32
120 x 96
32 x 50 NA
32 x 50 NA
48 x 30
88 x 72
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