COOK Gemini User Manual

		Gemini
		Ceiling and cabinet fans
	®	INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

This publication contains the installation, operation and maintenance procedures for standard units of the Gemini: Ceiling and Cabinet Fans.

Carefully read this publication and any supplemental documents prior to any installation or maintenance procedure.

Loren Cook Company’s Gemini catalog provides additional information describing the equipment, fan performance, available accessories and specification data.

For additional safety information, refer to AMCA publication 410-96, Safety Practices for Users and Installers of Industrial and Commercial Fans.

All of the publications listed above can be obtained from Loren Cook Company by phoning [phone], extension 166; by FAX at [phone]; or by e-mail at [e-mail].

For information and instructions on special equipment, contact Loren Cook Company at [phone].

Rotating Parts & Electrical Shock Hazard:

Disconnect electric power before working on unit.

Follow proper lockout / tagout procedures to ensure the unit cannot be energized while being installed or serviced.

A disconnect switch should be placed near the fan in order that the power can be swiftly cut off, in case of an emergency and in order that maintenance personnel are provided complete control of the power source.

Grounding is required. All field-installed wiring must be completed by qualified personnel. All field installed wiring must comply with National Electric Code (NFPA 70) and all applicable local codes.

Failure to follow these instructions could result in death or serious injury.

Receiving and Inspection

Carefully inspect the fan and accessories for any damage and shortage immediately upon receipt of fan.

•Turn the wheel by hand to ensure it turns freely and does not bind.

•Inspect dampers (if included) for free operation of all moving parts.

•Remove mounting brackets from packing insert & install mounting brackets (Gemini 100 only).

•Remove shipping tape.

•Record on the Delivery Receipt any visible sign of damage.

Handling

Lift fan by the outside housing (box) or by the blower mounting brace. Never lift by the shaft or motor.

Storage

If the fan is stored for any length of time prior to installation, store it in its original shipping crate and protect it from dust, debris and the weather.

Installation

Motor Installation

All Gemini units are shipped with motors mounted at the factory.

Gemini 100 Inline to Ceiling Conversion

The Gemini 100 series can be converted from inline to ceiling by ordering the Inline to Ceiling Conversion Kit from Loren Cook Company (Part Number 797180). The kit includes all parts required, plus detail instructions on how to convert the Gemini 100.

Gemini 100 Ceiling to Inline Conversion

The Gemini 100 series can be field converted from ceiling to inline by following these steps:

1.Remove and discard the inlet box end plate.

2.Install the inline cover panel with sheet metal screws as shown on the following page. Ceiling to Inline Conversion Kit can be ordered from Loren Cook Company (Part Number 797181), or fabricate the required part using the following two sketches.

Gemini 100

		18 Ga. Galvanized Steel
		16-3/4		14-1/16
		13-15/16	1-3/8
		Bend up at 90o	11-15/16 13-5/16	12
			(Inches)	1-7/16
	1	Flat Pattern		Finished Views

Inline

Cover

Panel

Direction of Discharge (200-900 Series)

Discharge direction can be converted from right angle to straight line, without a kit, by swapping outer panel and the inlet/grille: See Figure 1.

1.Remove the side panel, mounting brackets (2) and grille (if present).

2.Place the side panel where the inlet/grille had been. Place the mounting brackets on the edge where the side panel had been. Holes are prepunched for this procedure.

3.Rotate unit so that the outlet is on top.

Typical Installation

Figure 1

Start

Outlet

Inlet

Remove Parts

x2

Replace Parts

Outlet

Inlet

Fan Installation

1.Use the mounting bracket slots to lower the unit housing by a distance equal to the ceiling thickness. Refer to figure 2.

2.Raise the unit, as needed to accommodate accessories and options: If filter present, raise

Roof

Roof jack with damper or roof cap

Exterior

Wall

6” round duct. Insulated duct will help absorb vibration. Use the shortest runs

possible & long radius elbows.

Joists

Power

cord or

Short (1’) piece of flexible duct Seal around the will absorb vibration & noise. unit with caulk.

Insulation around unit.

Also, cover the fan with insulation.

Use foil tape on the joints to ensure a good seal.

Wall cap with damper

2

unit 3/8”. If filter and deluxe aluminum grille are both present, raise unit 7/8”, due to the 1/2” grate protrusion on the aluminum grille. If filter is not present: the grate on the aluminum grille will fit inside

of the unit (except sizes 160 & 180). Other grilles have no protrusion and fit flush with the fan.

3.Fasten duct work to the outside of the duct collar (damper frame) using sheet metal screws and foil tape. Make sure sheet metal screws are placed where they do not interfere with damper operation.

4.Fasten the housing to the bottom of the joists through the holes provided in the mounting bracket.

For Ceiling Radiation Damper Installation see separate document “Gemini/CRD Installation Supplement.”

Figure 2

Unit Housing

Joists

Mounting

Bracket

Ceiling

Grate Protrusion (aluminum grille only) Filter (optional) Grille

Notice! Do not install above or around cooking equipment (shaded area)

Cooking

Equipment

Floor

Wiring Installation

All wiring should be in accordance with local ordinances and the National Electrical Code, NFPA 70. Ensure the power supply (voltage, frequency, and current carrying capacity of wires) is in accordance with the motor nameplate. Refer to Wiring Diagrams.

Lock out all power sources before unit is wired to power source.

Follow the wiring diagram in the disconnect switch and the wiring diagram provided with the motor. Correctly label the circuit on the main power box and always identify a closed switch to promote safety (i.e., red tape over a closed switch).

Note: Insulate Unused Leads. Fan plug box is designed for single speed operation, using an FSC to vary speed if required. Do not wire to more than two leads.

Wiring Diagrams

Gemini 100 Series:

Cap off wire that is not in use.

Red Wire (Low Speed)

Black Wire (High Speed)

Green Wire (Ground by COOK)

White Wire

(Common) Ground Screw for Field Grounding

For fan power supply connection use 4-wire cable provided in field wiring box shown above. Connect field ground wire to green ground screw located inside fan electrical box. Connect one supply line to white wire. Depending on fan speed requirements connect other supply line to Red wire for Low Speed or Black wire

for High Speed. Insulate unused Red or Black wire. Replace electrical box cover. Model 126, 146, 166, 186 are Low Speed. Models 128, 148, 168, 188 are High Speed.

Gemini 200, 300, 500, 600 and 700 Series:

White				Line
Black (High)
Red (Low)				Line

Electrical Shock & Fire Hazard:

Insulate Unused Lead

Failure to follow these instructions could result in death or serious injury.

Gemini 400 Series:

White Line

Black Line

Wiring continued on the next page.

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