Installation, Control Box Mounting | Greenheck Fan 474750 specs

Hood Surface

0.75 to 0.875 inch

(19.0 to 22.2 mm) diameter hole

1/4-inch Compression Seal PN 463570

2 inches (50.8 mm)

Hood Exhaust Collar Front Side

0.75 to 0.875 inch

(19.0 to 22.2 mm) diameter hole

Installation

Control Box Mounting

Locate an area with enough space to mount the control box and fasten to the wall.

NOTE

Control box may be factory mounted. If so, continue to the next section.

5.Place the resistive temperature detector through the compression seal and tighten the compression

fitting.

6.Install the cover for the octagon box.

Resistive Temperature

Detector (RTD)

PN 384439

Octagon Extension

PN 830125

Octagon Cover

PN 380926

Resistive Temperature Detector(s) (RTD) Mounting

NOTE

Resistive temperature detector(s) may be factory installed. If so, continue to the next section.

1.Locate flat area(s) at the top interior of the hood in front of the filters, towards the front of the hood.

19.525 inches		3 inch air space

Duct Collar Mounting

1.Locate the exhaust duct on top of the hood. A 3/4 to 7/8-inch (19.0 to 22.2 mm) diameter hole must be cut into the duct 2 inches (50.8 mm) above the hood top. Center

the hole along the side of the duct. Make sure that the resistive temperature detector will not interfere with any

Exhaust Area

Sensor Install

(cutout area)

Supply Area

(optional)

TITLE

Top View of Exhaust Hood

2 inch typical

P.O.BOX 410 SCHOFIELD

INSTR, ADJ

fire system nozzles, or other items installed in the exhaust duct. If an exhaust fire damper is present the hood exhaust collar, it must be removed prior to temperature sensor installation.

2.Place the J-box plate inside of the octagon extension ring and place over the hole in the exhaust collar.

3.Disassemble the compression seal and place

through

hole in duct		Octagon Extension
collar and	Quik Seal	PN 830125
	Quik Seal

2. Cut a 3/4 to 7/8-inch diameter hole in the flat spot of the capture tank. Make sure the resistive temperature detector(s) will not interfere with fire

system nozzles and is not within 12 inches of light fixtures.

3.Place the J-box plate inside of the octagon extension ring and place over the hole.

4.Disassemble the compression seal and place through hole and J-box plate as shown. Tighten the nut inside the octagon extension ring.

Compression Seal

PN 463570

Gasket		Octagon Extension
Gasket		PN 830125
		PN 830125

J-Box Plate

PN 732396

Lock Washer

Nut

	J-box plate	Gasket
	J-box plate
	as shown.	J-Box Plate
	Tighten the	PN 732396
	Tighten the	Lock Washer
	nut inside	Lock Washer
	nut inside
	the octagon	Nut
	extension
	ring.
	4. Place the resistive temperature detector
	through the
	compression
	seal and
	tighten the	Octagon Cover
	compression	PN 380926
	compression
	fitting.
	5. Install the	Resistive Thermostat
	cover for the	Resistive Thermostat
	cover for the	Detector (RTD)
	octagon box.	PN 384439
	octagon box.

NOTE

All field installation and wiring of electrical equipment must be done to meet NEC and local codes.

Digital Temperature Interlock 3

474750 specifications

The Greenheck Fan Model 474750 is a high-performance ventilation solution designed for a variety of commercial and industrial applications. This fan is particularly known for its reliable operation, energy efficiency, and robust construction, making it an ideal choice for facilities that require adequate air movement and control.

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