Greenheck Fan 47555 specifications Duct Connections to the Bypass Air Plenum BAP

Duct Connections to the Bypass Air Plenum (BAP)

Connecting primary exhaust air ducts is allowed through the roof curb or through one or more of the side access panels. To reduce the potential for system effects in the plenum, the duct connection should

be sized to have a maximum air velocity of 1500 fpm when entering. When attaching ductwork to the plenum, care should be taken to ensure a tight fit and proper seal to prevent leakage of the contaminated airstream.

Ductwork that is a different size than the removable access panel can either use a transition to the plenum’s opening size, or the access panel can be field modified by cutting an opening to the size of the ductwork.

Vektor Field Coating Repair Procedure for Scratched Areas

Standard coating and color for the Vektor laboratory exhaust system is Greenheck’s Hi-Pro Polyester Gray (041).

The procedure below details the correct method for repairing minor scratches in the coating. Each Vektor unit is supplied with a repair kit for use after the initial installation.

The kit includes:

•1 pint Kem Kromik® Universal Metal Primer

•1 pint industrial enamel (Industrial 041 Gray)

•4 disposable foam brushes

•1 sheet of sandpaper

•2 tech data sheets for the two paints

•1 repair procedure.

1.Scuff affected area to be repaired using medium sandpaper (provided). Feather the edges.

2.Clean affected area to be touched up using an alkaline based cleaner and rinse.

3.Apply Kem Kromik® primer using the 1 inch foam brush (provided). Follow technical data sheet instructions.

4.Allow primer to dry a minimum of 2-1/2 hours before top coating.

5.Topcoat with Industrial enamel using 1 inch foam brush (provided). Follow technical data sheets instructions. Allow painted units to air-dry and cure before putting into service. See enclosed Technical Data sheets for detailed drying and cure schedules at different temperatures.

To order additional coating repair kits please reference Greenheck’s part number, HAZ2037 HI-PRO GRAY FIELD DAMAGE REPAIR KIT. Please contact factory with your fan’s serial number for colors other than our standard Gray (041).

Plenum and Fan Drainage Piping and Trap Detail (by others)

There are multiple locations for pipe connections, one on each plenum section, and another on each tubular fan housing located at the bottom of the scroll. Each drain should be properly connected to a drainage system to ensure proper disposal of any water or condensate that may occur.

•Installed piping to have a downward angle to allow for drainage

•Fill trap to recommended level before start-up

Detail of bypass air plenum and blower housing

1 in. drain coupling in blower housing and bypass air plenum

Y

X

1 inch of water

Clean out location

Y Dim ≥ System Pressure

X Dim ≥ 1/2 System Pressure

Dimension of X and Y are inches.

Note: Refer to local codes for proper disposal of potential hazardous drainage.

Bypass Air Plenum (BAP), Isolation Damper Access & Actuator Mounting

Depending on the configuration and intended operation of the system supplied, every Vektor plenum section may not have a weatherhood and bypass air damper. Typically systems that include a fan which

is on standby will have one less weatherhood and BAP damper assembly than plenum sections. Refer to submittal drawings for additional information. The appropriate guard / cover needs to be removed for installation, inspection and maintenance.

For Vektor Fans with a Weatherhood

Access to the bypass air plenum damper and the isolation damper, actuator(s) (optional from factory), and voltage transformer (optional from factory) is gained through the removal of the weatherhood guard / cover. The isolation damper assembly can be removed from its location by unbolting the frame from the plenum and removing the flex connector.

 Vektor-CD Centrifugal Laboratory Exhaust

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