Greenheck Fan Outdoor Air Ventilator Manuel d'utilisateur télécharger pdf (Page 8)

Straight

A B C D

Duct Length

NV-90 16

/4 24 34 1/222

/8 81

NV-120 16

/4 25

/2 34 23

/4 96

5. Attach Ductwork to Unit Discharge

Chart and drawing below show opening size (ID) and location for discharge collar. Also included is the

recommended straight duct lengths for optimal performance. Greenheck recommends attaching

ductwork using a rubber duct section at the unit to eliminate vibration.

Discharge Opening Sizes

Back View

NV-90 and NV-120

Straight Duct Length

4. Optional Up-stream Heating Coil

If an optional up-stream heating coil is provided with the unit an additional equipment support may be required. If

filters only are provided in this section, additional support is not needed. Follow the guidelines below for

determining the coil section support required. Page 18 lists unit weights for equipment support load

requirements.

Equipment Support Requirements:

Slab/Rail Mount Curb Mount

NV-90 None Curb Height

NV-120 12” Curb Height + 12”

Equipment Support

Cement Slab

Coil Section

Typical NV-120 installation

on cement slab with

optional up-stream heating

coil section .

See page 10 for attachment

instructions.

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Greenheck Fan Outdoor Air Ventilator Manuel d'utilisateur Page 8