Greenheck Fan Outdoor Air Ventilator Optional Up-stream Heating Coil, Discharge Opening Sizes

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”

Coil Section

Typical NV-120 installation on cement slab with optional up-stream heating coil section .

See page 10 for attachment instructions.

Equipment Support

Cement Slab

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

	A	B	C	D	Straight
					Duct Length
NV-90	161/4	24	34 1/2	223/8	81
NV-120	161/4	251/2	34	231/4	96

D C

B

A

Back View

NV-90 and NV-120

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