Damper Installation to a SP Fan
1. General:
The fan/damper assemblies described
in these instructions, when installed as shown,
provide appropriate protection for air inlet or outlet
penetrations in the ceiling membrane of floor/ceiling
and roof/ceiling assemblies with fire resistance
ratings of up to 3 hours.
2. System Components:
All system components
(ducts, duct drops, hanger wires, sleeves, and diffuser
pan) must be constructed of steel. The diffuser core
may be non-ferrous. Grilles may be non-metallic.
Flexible duct (if used) must be Class 1 or Class 0
type, bearing the UL listing mark. Maximum length of
flex duct shall not exceed 14 feet. The installations
and air devices shown in these instructions illustrate
general arrangement only. Installations must also
incorporate any specific requirements in the FRD (UL
Fire Resistance Directory). Note that both “Design
Information - General” and individual ceiling/floor or
ceiling/roof design listings apply.
3. Ceiling Penetrations:
Ceiling penetration should
be located within ceiling tiles, panels, or gypsum
without necessitating cuts in the ceiling suspension
SP Fan Size
CRD Model
UL Classified
ETL
(Warnock Hersey)
Listed
“D”
“E”
Width
(in.)
Height
(in.)
(See Figure 4)
1 Hour Com-
bustible
3 Hour Non-
Combustible
SP-B50, SP-B70,
SP-B80, SP-B90,
SP-B110,
SP-B150, SP-B200
-
CRD-320
CRD-320L
CRD-320
4
1
⁄
2
15
5
⁄
8
14
1
⁄
2
12
3
⁄
8
SP-A50, SP-A70,
SP-A90, SP-A110,
SP-A125,SP-A190
CRD-310WT
CRD-310
CRD-310L
CRD-310-WT
CRD-310
5
1
⁄
2
14
5
⁄
8
13
5
⁄
8
11
1
/
8
SP-A250, SP-A290,
SP-A390, SP-A200
-
CRD-320
CRD-320
6
3
⁄
4
15
1
⁄
2
14
1
⁄
2
12
3
⁄
8
SP-A410, SP-A510,
SP-A710, SP-A780
-
CRD-350
CRD-350
9
1
⁄
4
19
5
⁄
8
18
1
⁄
2
14
7
⁄
8
SP-A900, SP-A1050
CRD-360
CRD-360
9
1
⁄
4
25
3
⁄
8
24
1
⁄
4
14
7
⁄
8
SP-A1550
CRD-700
--
9
1
⁄
4
25
1
⁄
8
24
1
⁄
8
12
1
⁄
4
main runners, cross tees, or trusses. If required, a
maximum of one runner or cross tee may be cut
to enable proper damper location and installation.
Each cut end shall be supported by a minimum 12
SWG vertical hanger wire. a
1
⁄
2
in. clearance must
be maintained between the air inlet/outlet and
the cut end of the runner or cross tee. Cutting of
wood trusses in combustible ceiling designs is not
permitted.
4. Connections:
Connections must be made using #8
sheet metal screws,
3
⁄
16
in. tubular steel rivets, tack
or spot welds. Use a minimum of one connection
per side for rectangular or square dampers and three
equally spaced connections for round dampers.
Space fasteners a maximum of 6 in. apart. Any W or
H dimension larger than 12 in. requires a minimum
of two connections per side. All screws or rivet
attachments shall be placed a minimum of
3
⁄
16
in from
the edge of the damper frame, duct drop, diffuser, or
grille frame. When making connections, the ceiling
radiation damper may slide over the neck or inside
the neck of the diffuser, grille, or inlet/outlet device.
CRD Series for SP Fans
4
®
