Greenheck Fan WD-400 Series User's Manual
Contents
1. blades from 0 025 in 64mm roll formed aluminum 3 6 in 4 8mm dia plated steel full length axles turning in acetal bearings damper shall be equipped with extruded vinyl blade seals and internal 0 064 in 1 6mm aluminum tie bar 8 32 64 74 128 14 To 32 To 64 Thru 74 Up To 128 To 148 8 Double Double Panel Panel Two Three Section Section Double Double Panel Panel Four Six Section Section on blade with spring closure Damper manufacturer s printed application and performance data including pressure velocity and temperature limitations shall be submitted for approval showing damper suitable for pressures to 2 0 in wg 498 Pa velocities to 2500 fpm 13m s and temperatures to 180 F 82 C Testing and ratings to be in accordance with AMCA Standard 500 D Basis of design is Greenheck model WD 400 A GREENHECK Copyright 2005 Greenheck Fan Corporation WD 400 Rev 5 November 2005 P O Box 410 Schofield WI 54476 0410 715 359 6171 greenheck com2. H cREENHECK WD 400 SERIES Non Motorized Backdraft Damper Horizontal or Vertical Mount Intake Application and Design The WD 400 series are non motorized backdraft dampers which may be mounted either vertically for intake air or mounted horizontally to allow vertical airflow down and prevent reverse airflow The dampers are opened by air pressure differential and closed by springs Optional motor packs are not available Ratings See page 2 for specific limitations Pressure 2 0 in wg 498 Pa differential pressure Velocity 2500 fpm 13 m s Temperature 180 F 82 C I Standard Construction Frame 18 ga 1 3mm galvanized steel Blades 0 025 in 0 64mm aluminum Axles 6 in 4 8mm dia zinc plated steel rod full length H Single Panel KI Double Panel Bearings Synthetic acetal Linkage 0 064 in 1 6mm 6061T6 aluminum tie bar xX Blade Seals Vinyl Triple Panel W amp H dimensions furnished approximately 1 in 3mm under size Size Limitations see pages 3 amp 4 for specific limitations Minimum Panel Size 8 in Wx 8 in H 203mm x 203mm t H 7 Maximum Panel Size Byin QR Single Panel 31 in Wx 74 in H an eE 787mm x 1880mm 3 Double Panel WD 400 410 50 in W x 74 in H Model WD 410 1 270mm x 1 880mm No Flange Double Panel WD 420 430 63 in W x 74 in H 4 1600mm x 1880mm ies vem Triple Panel
3. WD 420 430 74 in W x 74 in H 1880mm x 1880mm Options and Accessories at additional cost H 7 i e 11 2 in 38mm flange on discharge WD 420 e 11 2 in 38mm flange on intake WD 430 e Stainless Steel Axles X y 112 in asl acl 1 Vein 334 in 45 in Max 3 E 31 2 in 45k in 312 in Max 45 3 in m Max Model WD 400 Model WD 420 Model WD 430 No Flange Flange on Discharge Flange on Intake PERFORMANCE DATA Pressure Drop Performance data results from testing a 36 in x 36 in 914mm x 914mm damper in accordance with AMCA Standard 500 D using Figure 5 3 for the WD 400 and Figure 5 7A for the WD 410 All data has been corrected to represent standard air at 0 075 WD 400 AP in wg Pa lb ft 1 201 kg m3 Operational Data Blades Start to Open 0 026 250 Blades Fully Open 0 04 1200 Pressure Drop 36 in x 36 in 914mm x 914mm Damper Pressure Loss in wg 2 3 4 5 678910 2 x10 3 4 5678910 2 x100 3 4 5678910 x1000 Velocity fpm Leakage Leakage testing was conducted in accordance with AMCA Standard 500 D and is expressed as cfm ft of damper face area All data has been corrected to represent standard air at 0 075 Ib ft 1 201 kg m P
4. le Double Single Double Panel Panel Panel Panel Panel Panel One One Two Two Four Three Section Section Section Section Section Section co Single Double Single Double Panel Panel Panel Two Two Four Section Section Section Single Double Panel Panel Panel Four Eight Six Section Section Section 148 Note A 26 in x 26 in and a 30 in x 30 in WD 410 will be supplied as a Double Panel One Section damper Width and height given in inches WD 420 430 SELECTION SPECIFICATIONS e Multiple section dampers shown below are supplied as equal size sections Any damper that has multiple sections both vertically and horizontally will require field assembly and will require additional reinforcement not supplied by Greenheck to support the assembly These larger dampers must have the additional reinforcement to give them structural stability e Please note that the width dimension is always taken as being parallel to the length of the blades Width Single Double Triple Panel Panel Panel One One One Section Section Section gt 74 c D 8 I Single Double Panel Panel eee Two Two Ss Section Section e S tr 148 Width and height given in inches Specifications Backdraft dampers meeting the following specifications shall be furnished and installed where shown on plans and or as described in schedules Dampers shall consist of 18 ga 1 3mm galvanized steel frame with 3 12 in 89mm depth
5. ressure Loss in wg WD 400 SERIES WD 410 A Pa Operational Data Blades Start to Open 0 014 22 3 5 0 1 Blades Fully Open 0 12 1000 5 1 Pressure Drop 30 Pa 36 in x 36 in 914mmx 914mm Damper 1 2 3 4 5 678910 x 1000 3 4 5 678910 2 3 4 5678910 2 x10 x100 Velocity fpm Leakage 36 in x 36 in 914mm x 914mm Damper 8 5 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 0 9 0 8 0 7 0 6 0 5 0 4 Static Pressure Difference In wg 0 3 0 2 1 2 3 4 5 678910 20 30 40 50 60 708090100 150 Air Leakage in cfm ft WD 400 410 SELECTION Multiple section dampers shown below are supplied as equal size sections Any damper that has multiple sections both vertically and horizontally will require field assembly and will require additional reinforcement not supplied by Greenheck to support the assembly These larger dampers must have the additional reinforcement to give them structural stability Please note that the width dimension is always taken as being parallel to the length of the blades vwwiatn 8 32 50 64 100 128 150 32 Up Above 50 64 Up Above 100 128 Up To 32 Thru 50 Up To 64 Thru 100 Up To 128 To 150 Single Double Sing
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