Greenheck DFD Series Скачать руководство пользователя страница 11 | Manualshive

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Horizontal Mount

Damper Model

Maximum Single
Section Size in a

Multiple Section

Assembly

Maximum Over-

all Size for

Multi-Section

Dampers

CFSD-211, 212

24 x 24

NA

DFD-210

32 x 50

128 x 96

DFD-230

32 x 48

72 x 48

DFDAF-310

32 x 50

144 x 96

DFDTF-210

32 x 36

96 x 72

32 x 48

64 x 48 or 32 x 96

FSD-211, 212, 213

36 x 48 or 32 x 50

144 x 96

FSD-211M, 212M

36 x 36

144 x 72

FSD-231

36 x 36 or 32 x 48

72 x 48

FSD-311, 311M, 312,
312M

32 x 50

144 x 96

IMO-310

32 x 50

NA

IMO-311

32 x 50

NA

SEDFD-210,
SEFSD-211

24 x 30

48 x 30

SSFSD-211

24 x 30

48 x 30

FSD-231M

36 x 36

72 x 48

2 in.

Max.

6 in.

Max.

Sleeve

Retaining

Angle

Damper

Duct

Min. 1 in.

Overlap*

Wall or

Floor

Retaining

Angle

*only applicable for damper sizes above 36 in. x 36 in.

6 in.

Max.

2 in.

Max.

Both vertical and horizontal damper installations are typified by these
drawings.

Fig. 3

5. ACTUATOR CONNECTIONS

Electrical and/or pneumatic connections to damper
actuators should be made in accordance with wiring and
piping diagrams developed in compliance with applicable
codes, ordinances and regulations (see

Electrical

Guidelines

).

6. INSTALLING MULTIPLE DAMPER SECTION

ASSEMBLIES

A damper assembly is not restricted to a maximum
number of sections, but must not exceed the section
sizes and overall sizes shown (see chart).

Two section high dampers require reinforcement using a
14 gauge (2mm), 5 in. (127mm) wide mullion as shown in

Fig. 4

below, or two individually sleeved units stacked

vertically, shown below in

Fig. 5

. When using two

individually sleeved units, the sleeve acts as the mullion,
therefore no mullion is required.

The damper sections must be attached together with
#10 (

3

/

4

in. max. [19mm]) sheet metal screws,

1

/

4

in. (6mm)

diameter nuts and bolts, tack or spot welds, or

3

/

16

in.

(48mm) diameter steel pop rivets. Attachments must be
spaced a maximum of 6 in. (152mm) on centers and a
maximum of 2 in. (51mm) from corners.

Attachments must

be made on front face and back face (air entering and air
exiting side) of damper sections.

Note:

Dampers ordered for individual installation may

not be installed together. The full assembly size must be
specified at the time the dampers are ordered.

14 ga.
5 in. wide
support
mullion

Fig. 4

Fig. 5

Single Sleeve Around Outside with

Support Mullion

Two Individually Sleeved Units

with No Mullions

NOTE:

FSD model dampers fitted with a fusible link closure

device are limited to single section sizes. Dampers with a
fusible link and spring assembly closure device may not be
used for multiple section applications

.

Vertical Mount

Damper Model

Maximum Single
Section Size in a

Multiple Section

Assembly

Maximum

Overall Size for

Multi-section

Dampers

DFD-210

32 x 50

128 x 100

DFD-230

32 x 50

72 x 48

DFDAF-310

32 x 50

128 x 100

DFDTF-210

32 x 36

96 x 72

32 x 50

64 x 50

FSD-211, 212, 213

36 x 48 or 32 x 50

128 x 100

FSD-211M, 212M

36 x 36

128 x 72

FSD-231

36 x 36 or 32 x 48

72 x 48

FSD-311, 311M,
312, 312M

32 x 50

128 x 100

IMO-311

32 x 50

NA

32 x 50

NA

SEDFD-210,
SSDFD-210

24 x 30 or 22 x 36

48 x 30

SEFSD-211
SSFSD-211

24 x 30 or 22 x 36

88 x 72

FSD-331; DFDAF-330

30 x 48

120 x 96

FSD-231M

36 x 36

72 x 48

11

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Содержание DFD Series

Страница 1: ... OFSD XXX ODFD XXX OFD XXX and OSSFD XXX Series 16 27 461666 FSD 3XXV Series 28 35 461868 FSDR XXX SEFSDR XXX SSFSDR XXX Models 36 42 472477 GFSD Models 43 48 474015 Single Side Retaining Angle 49 51 KIT 826249 MULTI BLADE FIRE DAMPERS DFD FSD CFSD OFSD INSTALLATION INSTRUCTION BOOKLET FOR MULTI BLADE FIRE COMBINATION FIRE SMOKE DAMPERS 1 ...

Страница 2: ...555 555S Classification R13317 CFSD models meet the requirements for corridor ceiling dampers smoke dampers and combination fire smoke dampers established by National Fire Protection Association NFPA Standards 80 90A 92A 92B 101 105 IBC International Building Codes New York City MEA listing 260 91 M California State Fire Marshal Listing 3225 0981 106 and Listing 3230 0981 105 Receiving and Handlin...

Страница 3: ...mm x 152mm 2 CLEARANCES REQUIRED BETWEEN CORRIDOR DAMPER SLEEVES AND CEILING OPENINGS The interior dimension of the prepared ceiling opening should be 1 4 in 6mm larger than the overall size of the damper and sleeve assembly These are total clearances ignoring fastener heads and do not need to be spaced equally around the damper 3 SECURING CORRIDOR DAMPER SLEEVES TO FIRE RATED CEILING OPENINGS Cor...

Страница 4: ...d runner flanges surrounding opening with fasteners as designated by the appropriate corridor ceiling design Steel studs 2 in x 4 in nominal wood studs Steel Stud Assembly Wood Stud Assembly 24 in max 24 in o c max 24 in max 24 in o c max Opening lined with UL rated 5 8 in gypsum board Steel studs Steel Stud Assembly 24 in max 24 in o c max 24 in o c max Fig 1 Fig 2 4 DUCT TO SLEEVE CONNECTIONS Da...

Страница 5: ...d Clip Length C L Duct 60 Duct 4 Reqd 48 Duct 3 Reqd 36 Duct 3 Reqd 24 Duct 2 Reqd 18 Duct Smaller 1 Reqd Clip Spacing Typical TDC TDF joint 6 Fig 7 Duct End Flange Corner Piece 3 8 in bolt optional Fig 8 Fire Damper Sleeve Neoprene or Butyl gasket between all angles Flanged system angles Attach per manufacturer s instructions Duct 3 8 in bolts in corners are optional 6 in long 1 16 in max thickne...

Страница 6: ...t typically require maintenance as long as they are kept dry and clean If cleaning is necessary use mild detergents or solvents If lubrication is desired for components such as axle bearings jackshaft bearings and jamb seals do not use oil based lubricants or any other lubricants that attract contaminants such as dust Dampers and their actuator s must be maintained cycled and tested a minimum in a...

Страница 7: ...ndard 555 555S Classification R13317 FSD XXX SEFSD XXX SSFSD XXX DFD XXX SEDFD XXX and CFSD XXX Series Dampers are intended for installation in accordance with combination fire smoke damper requirements established by National Fire Protection Association NFPA Standards 80 90A 92A 92B 101 105 IBC International Building Codes New York City MEA listing 260 91 M California State Fire Marshal Listing 3...

Страница 8: ...terials d Wall texture e Paint overspray 7 Damper should be sufficiently covered as to prevent overspray if wall texturing or spray painting will be performed within 5 feet of the damper Excessive dirt or foreign material deposits on damper can cause excessive leakage and or torque requirements to exceed damper actuator design 8 Caulking is not necessary nor is it allowed between the damper sleeve...

Страница 9: ...that openings in walls or floors be larger than the fire smoke damper and sleeve assembly to allow for this expansion Minimum clearances required between the outside of fire damper sleeve assemblies and wall floor openings are Galvanized steel fire dampers and sleeves 1 8 in per foot 3mm per 3 m of damper width and 1 8 in per foot 3mm per 3 m height with a minimum clearance of 1 4 in 6mm maximum o...

Страница 10: ... as described below Retaining angles for 11 2 hour rated dampers with a width and height 48 in 1219mm or less must be a minimum of 20 ga 1mm Retaining angles for all 3 hour rated dampers and all dampers with a width or height greater than 48 in 1219mm must be a minimum of 16 gauge 1 5mm The leg of the retaining angle on the damper sleeve shall be a minimum of 11 4 in 32mm The leg of the retaining ...

Страница 11: ...shown below in Fig 5 When using two individually sleeved units the sleeve acts as the mullion therefore no mullion is required The damper sections must be attached together with 10 3 4 in max 19mm sheet metal screws 1 4 in 6mm diameter nuts and bolts tack or spot welds or 3 16 in 48mm diameter steel pop rivets Attachments must be spaced a maximum of 6 in 152mm on centers and a maximum of 2 in 51mm...

Страница 12: ...sensor is exceeded the damper closes and remains closed thereafter The TOR assembly also contains a single pole double throw switch used to indicate damper blade position The switch provides a positive open or closed signal when used in conjunction with remote indicator lights See Fig 8 for wiring of the TOR thermostats and indicator switches If either the TOR or the RRL is ordered with a pneumati...

Страница 13: ...see Fig 10 11 All construction and fasteners must meet the requirements of the appropriate wall design See UL Fire Resistance Directory and or local codes 12 in 24 in o c Maximum Floor Runner Ceiling Runner 24 in o c Maximum metal studs 24 in o c Maximum metal studs 16 in o c Maximum wood studs 16 in o c Maximum wood studs 2 in 51mm 2 in 51mm 2 Panhead Screws Fig 12 Metal Stud Construction Wooden ...

Страница 14: ...mm wide or dia and smaller shall have three screws Ducts larger than 22 in 558mm wide or dia up to and including 36 in 914mm wide or dia shall have five screws NOTE All breakaway connections described may have duct sealant applied PA2084T duct sealant adhesive manufactured by Precision DP1010 water base duct sealant manufactured by Design Polymetrics Grey Pookie Ductmate PROseal or CL Ward S Seal ...

Страница 15: ...cally require maintenance as long as they are kept dry and clean If cleaning is necessary use mild detergents or solvents If lubrication is desired for components such as axle bearings jackshaft bearings and jamb seals do not use oil based lubricants or any other lubricants that attract contaminants such as dust Dampers and their actuator s must be maintained cycled and tested a minimum in accorda...

Страница 16: ...e Any units or parts which prove to be defective during the warranty period will be repaired or replaced at our option Greenheck shall not be liable for damages resulting from misapplication or misuse of its products Greenheck will not be responsible for any installation or removal costs Greenheck will not be responsible for any service work or backcharges without prior written authorization Safet...

Страница 17: ...e kept clean and protected from dirt dust and other foreign materials prior to and after installation Examples of such foreign materials include but are not limited to a Mortar dust b Drywall dust c Firesafing materials d Wall texture e Paint overspray 7 Damper should be sufficiently covered as to prevent overspray if wall texturing or spray painting will be performed within 5 feet of the damper E...

Страница 18: ...y Figure 1 Installation configurations for Out of Wall combination fire smoke dampers Duct Terminates Wood Stud Duct Terminates Metal Stud Steel stud Flange Grille Supplied by others Factory Supplied Thermal Blanket Factory Supplied Thermal Blanket 7 1 2 in Max 7 1 2 in Max Damper Damper 10 2 1 2 in long sheet metal screws spaced 6 in on center and maximum of 2 in from the corners minimum of 2 scr...

Страница 19: ...Wall Duct Terminates Flange Method Type A Horizontal Mount Below Floor Wall Duct Terminates Single Angle Method Flange 7 1 2 in 191mm max Factory Supplied Thermal Blanket Masonry or Concrete Floor Damper 7 1 2 in 191mm max Factory Supplied Thermal Blanket Retaining Angle Alternate Retaining Angle Location Concrete or Masonry Wall Wood Stud Steel Stud Damper 7 1 2 in 191mm max Retaining Angle Facto...

Страница 20: ... 191mm max Factory Supplied Thermal Blanket Damper Masonry or Concrete Wall Metal Stud Wood Stud Masonry or Concrete Floor 7 1 2 in 191mm max Retaining Angle Factory Supplied Thermal Blanket Damper Retaining Angle 7 1 2 in 191mm max Retaining Angle Retaining Angle Factory Supplied Thermal Blanket Masonry or Concrete Floor Damper Concrete or Masonry Wall Wood Stud 7 1 2 in 191mm maximum Factory Sup...

Страница 21: ...t Thru Duct with Two Retaining Angles Type B2 Horizontal Mount Above Floor Wall Thru Duct with Two Retaining Angles Type B2 Horizontal Mount Below Floor Wall Thru Duct with Two Retaining Angles Wood Stud Masonry or Concrete 7 1 2 in 191mm Maximum Retaining Angle Retaining Angle Damper Factory Supplied Thermal Blanket Metal Stud Damper Masonry or Concrete Retaining Angle Retaining Angle Factory Sup...

Страница 22: ...1 2 in 191mm maximum Factory Supplied Thermal Blanket Retaining Angle Concrete or Masonry 7 1 2 in 191mm maximum Damper Type B2 Vertical Mount Duct Terminates Single Angle Method Type B2 Horizontal Mount Above Floor Wall Duct Terminates Single Angle Method Type B2 Horizontal Mount Below Floor Wall Duct Terminates Single Angle Method 7 1 2 in 191mm maximum Retaining Angle Alternate Retaining Angle ...

Страница 23: ...onry 7 1 2 in 191mm maximum Damper Retaining Angle Retaining Angle Factory Supplied Thermal Blanket 7 1 2 in 191mm maximum Concrete or Masonry Damper Type C2 Vertical Mount Duct Terminates Flange Method Type C2 Horizontal Mount Above Floor Wall Duct Terminates Flange Method Type C2 Horizontal Mount Below Floor Wall Duct Terminates Flange Method 7 1 2 in 191mm maximum Factory Supplied Thermal Blank...

Страница 24: ...ections and may be used Thermal Blanket installed around entire outside surface of sleeve Wall Flange Figure 3 Sleeved damper with Thermal Blanket duct termination 4 SECURING THE DAMPER SLEEVE ASSEMBLY TO WALL OPENINGS Damper sleeve assemblies must be installed in wall openings using flanges and sheet metal screws as illustrated and described below Flange on front grille end of sleeve must be a mi...

Страница 25: ...5A Prepare opening between studs and sleeve assembly as shown Figure 6 7 All construction and fasteners must meet the requirements of the appropriate wall design See UL Fire Resistance Directory and or local codes 4 SECURING THE DAMPER SLEEVE ASSEMBLY TO WALL OPENINGS continued Retaining angles must be attached to the sleeve using one or more of the following methods of attachment Tack or spot wel...

Страница 26: ...Drive Slip Joint Figure 7 Plain S Slip Hemmed S Slip Double S Slip Inside Slip Joint Standing S Standing S Alt Standing S Alt Standing S Standing S Bar Reinforced Angle Reinforced Figure 8 Fire Damper Sleeve Neoprene or Butyl gasket between all angles Flanged system angles Attach per manufacturer s instructions Duct 3 8 in bolts in corners are optional 6 in long 1 16 in max thickness plastic cleat...

Страница 27: ... such as axle bearings jackshaft bearings and jamb seals do not use oil based lubricants or any other lubricants that attract contaminants such as dust Dampers and their actuator s must be maintained cycled and tested a minimum in accordance with The latest editions of NFPA 80 90A 92A 92B 101 105 UL864 AMCA 503 03 and local codes Actuator manufacturer recommendations Duct End Flange Corner Piece 3...

Страница 28: ...ance with combination fire smoke damper requirements established by National Fire Protection Association NFPA Standards 80 90A 92A 92B 101 105 IBC International Building Codes New York City MEA listing 260 91 M California State Fire Marshal Listing 3225 0981 103 and 3230 0981 104 Receiving and Handling Upon receiving dampers check for both obvious and hidden damage If damage is found record all ne...

Страница 29: ...r must be installed into duct or opening square and free of twist or other misalignment Damper must not be squeezed or stretched into duct or opening Out of square racked twisted or misaligned installations can cause excessive leakage and or torque requirements to exceed damper actuator design 6 Damper and actuator must be kept clean and protected from dirt dust and other foreign materials prior t...

Страница 30: ...ensions of 1 36 in 914mm or less 1 2 in 13mm clearance These are total clearances ignoring fastener heads and do not need to be equally spaced around the damper 2 SLEEVE LENGTH AND WALL THICKNESS Insert the sleeved damper assembly into the prepared opening to appropriate depth refer to label on outside of sleeve for location of damper in wall see Dimension A and Detail 1 Fig 1 Recommended maximum ...

Страница 31: ...Type R and O Factory Furnished Duct Collars Qualify As Breakaway Connections Duct Damper Sleeve Wall or Floor Type C O R Fig 2 Damper with type R or O transition factory furnished 2 in Max 6 in Max Sleeve Retaining Angle Damper Duct Min 1 in Overlap Wall or Floor Retaining Angle only applicable for damper sizes above 36 in x 36 in 6 in Max 2 in Max Both vertical and horizontal damper installations...

Страница 32: ...option TOR The TOR temperature override device option incorporates two thermostats with fixed settings usually 165 F 74 C and 350 F 177 The primary sensor the sensor with the lower temperature setting can be bypassed by an external electrical signal allowing the damper to reopen until the temperature reaches the setting of the secondary sensor the sensor with the higher temperature setting When th...

Страница 33: ...Stud Construction Wooden Stud Construction In wood stud construction gypsum wallboard must cover all wood stud surfaces Gypsum Wallboard Stud or Runner Retaining Angle 1 in Min Damper Sleeve In metal stud construction exposed steel surfaces need not be covered with gypsum wallboard Gypsum Wallboard Stud or Runner Retaining Angle 1 in Min Damper Sleeve Fig 8 7 RECOMMENDED PREPARATION OF OPENINGS IN...

Страница 34: ...mmendations Drive Slip Joint Fig 11 Plain S Slip Hemmed S Slip Double S Slip Inside Slip Joint Standing S Standing S Alt Standing S Alt Standing S Standing S Bar Reinforced Angle Reinforced Fig 12 Fire Damper Sleeve Neoprene or Butyl gasket between all angles Flanged system angles Attach per manufacturer s instructions Duct 3 8 in bolts in corners are optional 6 in long 1 16 in max thickness plast...

Страница 35: ... causing blades to bind on jamb seals Adjust frame such that it is square and plumb Actuator linkage loose Close damper disconnect power adjust and tighten linkage Defective motor Replace Screws in damper linkage Damper installed too far into wall Move out to line as designated on damper label Contaminants on damper Clean with a non oil based solvent see Damper Maintenance RRL or TOR sensor trippe...

Страница 36: ...mplete marking on product UL Standard 555 555S Classification R13317 FSDR XXX SEFSDR XXX and SSFSDR XXX Model Dampers are intended for installation in accordance with combination fire smoke damper requirements established by National Fire Protection Association NFPA Standards 80 90A 92A 92B 101 105 IBC International Building Codes New York City MEA listing 260 91 M California State Fire Marshal CS...

Страница 37: ... separated replace link Never install a fire damper without the proper UL approved fusible link in place Fusible link is standard control option An electric link may have been provided Electric links have a button for resetting 2 Lift or handle damper using the frame Do not lift damper using blades or actuators 3 Do not install screws into the main body area of the damper frame as screws may inter...

Страница 38: ... single retaining plate on either side of the wall floor or by using a retaining plate on both sides of the wall floor The use of a second retaining plate is allowed but is not necessary A single retaining plate is provided with the dampers A second retaining plate can be ordered as an option The outside dimension of the supplied retainer plate is nominal dia 41 2 inches 114mm 3 ROUND DUCT CONNECT...

Страница 39: ...Scre w Minimum Wall Floor Opening Nominal Dia 7 8 in Fig 2 Fig 3 Fig 4 RRL Wiring The retaining plate s will open up for easy installation when the clamping screw is loosened If necessary remove the clamping screw and nut see Fig 2 Position the retaining plate between the blade axle and the actuator shaft as shown in Figure 1 Do not place the retaining plate in the groove IMPORTANT The clamping me...

Страница 40: ...TOR thermostats and indicator switches Fig 5 OCI Wiring Fig 6 RRL OCI Wiring RATINGS Fig 4 5 6 7 Integral Switch Type Single Pole double throw Electrical Capacity 10 Amps 1 3 hp 120 or 240 Vac 1 2 Amp 125 Vdc 1 4 Amp 250 Vdc 5 Amps 120 Vac L lamp load 1 0 Amps 24 Vac 1 5 Amps 24 Vdc Temperature Limit 165 F standard primary sensor 212 F optional primary sensor 250 F secondary sensor 350º F secondar...

Страница 41: ... on center to all stud and runner flanges surrounding opening see Fig 9 9A Prepare opening between studs and sleeve assembly as shown below see Fig 8 All construction and fasteners must meet the requirements of the appropriate wall design See UL Fire Resistance Directory and or local codes IN THIS GROOVE RETAINER PLATE DO NOT PLACE IN THIS GROOVE DO NOT PLACE RETAINER PLATE DAMPER FRAME DAMPER FRA...

Страница 42: ...ausing blades to bind on jamb seals Adjust frame such that it is square and plumb Actuator linkage loose Close damper disconnect power adjust and tighten link age Defective motor Replace Screws in damper linkage Damper installed too far into wall Move out to line as designated on damper label Contaminants on damper Clean with a non oil based solvent see Damper Mainte nance RRL or TOR sensor trippe...

Страница 43: ...e during the warranty period will be repaired or replaced at our option Greenheck shall not be liable for damages resulting from misapplication or misuse of its products Greenheck will not be responsible for any installation or removal costs Greenheck will not be responsible for any service work or backcharges without prior written authorization Safety Warning Improper installation adjustment alte...

Страница 44: ...damper can cause excessive leakage and or torque requirements to exceed damper actuator design 8 Caulking is not necessary nor is it allowed between the damper sleeve and the wall or floor opening annular space However caulking may be applied to the retaining angles 9 ACCESS Suitable access such that RRL s and actuators can be maintained etc must be provided for damper inspection and servicing Whe...

Страница 45: ...r additional field installed sleeves Sleeve gauges of 16 or 14 1 5mm 2mm are to be used UL Standard 555 requires all ducts to terminate at fire damper sleeves Sleeve thickness must not be less than the gauge of the connecting duct Duct to sleeve breakaway connections must be of the type described on page 10 Factory furnished round duct collars on type R and CR dampers are also considered to be bre...

Страница 46: ...ire outside surface of sleeve 2 in Max 6 in Max 6 in Max 2 in Max Wall Figure 3 Sleeved damper with Thermal Blanket duct continuation Note Thermal blanket is riveted to the damper sleeve and the seam is taped with acrylic adhesive tape FSK facing tape 152 5CWnt manufactured by Venture Tape Company 12 in 24 in o c Maximum Floor Runner Ceiling Runner 24 in o c Maximum metal studs 24 in o c Maximum m...

Страница 47: ... Joint Figure 6 Plain S Slip Hemmed S Slip Double S Slip Inside Slip Joint Standing S Standing S Alt Standing S Alt Standing S Standing S Bar Reinforced Angle Reinforced Figure 7 Round and Oval Duct Breakaway Connections Round or flat oval ducts connected to Type R or O damper collars shall be attached with 10 19mm sheet metal screws as follows Ducts to 22 in 558mm wide or dia and smaller shall ha...

Страница 48: ...nents such as axle bearings jackshaft bearings and jamb seals do not use oil based lubricants or any other lubricants that attract contaminants such as dust Dampers and their actuator s must be maintained cycled and tested a minimum in accordance with The latest editions of NFPA 80 90A 92A 92B 101 105 UL864 AMCA 503 03 and local codes Actuator manufacturer recommendations Duct End Flange Corner Pi...

Страница 49: ...ements On vertical mount single side angle installations there are no minimum clearance requirements between the wall opening and the damper sleeve However to facilitate installation clearances between the wall opening and the damper sleeve are recommended On horizontal mount single side angle installations a minimum clearance is required between the outside of the damper sleeve and the floor open...

Страница 50: ... 1 2 in UL Classified Gypsum Wallboard see UL Rated Wall Design for Additional Details 2 1 2 in Min Stud or Runner Damper Sleeve Angle Fastener see Section 2 Figure 6 2 Hour Wall Rating 1 2 in UL Classified Gypsum Wallboard see UL Rated Wall Design for Additional Details 2 1 2 in Min Stud or Runner Damper Sleeve Angle Fastener see Section 2 Figure 5 1 Hour Wall Rating Drywall screws of a length su...

Страница 51: ...gure 10 Note Screws used to attach grille are allowed to penetrate reversed angle leg Damper Sleeve Angle Fastener see Note 2 Grille supplied by others 10 sheet metal screws spaced 6 in on center and a maximum of 2 in from the corners minimum of 2 screws per side Screw into studs so as to avoid space conflicts with the grille 1 2 in UL Classified Gypsum Wallboard see UL Rated Wall Design for Addit...

Страница 52: ...Copyright 2014 Greenheck Fan Corporation September 2014 52 ...

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