Greenheck Fan 470658 MSX manual Installation of Electrical Wiring, Connect the Main Power, danger

Installation of Electrical Wiring

important

Before connecting power to the unit, read and understand the following instructions and wiring diagrams. Complete wiring diagrams are attached on the inside of the control center door(s).

important

All wiring should be done in accordance with the latest edition of the National Electric Code ANSI/ NFPA 70 and any local codes that may apply. In Canada, wiring should be done in accordance with the Canadian Electrical Code.

important

The equipment must be properly grounded. Any wiring running through the unit in the airstream must be protected by metal conduit, metal clad cable or raceways.

caution

If replacement wire is required, it must have a temperature rating of at least 105°C, except for an energy cut-off or sensor lead wire which must be rated to 150°C.

danger

High voltage electrical input is needed for this equipment. This work should be performed by a qualified electrician.

caution

Any wiring deviations may result in personal injury or property damage. Greenheck is not responsible for any damage to, or failure of the unit caused by incorrect final wiring.

important

Greenheck’s standard control voltage is 24 VAC. Control wire resistance should not exceed

0.75ohms (approximately 285 feet total length for 14 gauge wire; 455 feet total length for 12 gauge wire). If the resistance exceeds 0.75 ohms, an industrial-style plug-in relay should be wired in place of the remote switch. The relay must be rated for at least 5 amps and have a 24 VAC coil. Failure to comply with these guidelines may cause motor starters to chatter or not pull in, resulting in contactor failures and/or motor failures.

1.Determine the Size of the Main Power Lines

The unit’s nameplate states the voltage and the unit’s MCA. The main power lines to the unit should be sized accordingly. The nameplate is located on the outside of the unit on the control panel side.

Voltage, Hertz, Phase

VOLTS	HZ		PH
SUP HP	EXH HP
MCA		MOP

Unit’s Total MCA

Electrical Nameplate

2.Provide the Opening(s) for the Electrical Connections

Electrical openings vary by unit size and arrangement and are field supplied.

3. Connect the Main Power

Connect the main power lines to the disconnect switch and main grounding lug(s). Torque field connections to 20 in.-lbs.

4. Wire the Optional Convenience Outlet

The convenience outlet requires a separate 115 volt power supply circuit. The circuit must include short circuit protection which may need to be supplied by others.

5. Wire the Optional Accessories

Reference the Ladder Diagram on the inside of the control center door for correct wiring of the following accessories:

• Blower Switch	• TSCP
• Heat Switch	• KSCP

•Indicating Lights

•Dirty Filter Indicator

NOTE

TSCP has number-to-number wiring.

6. Wire the Optional Evaporative Cooler

Reference the Ladder Diagram on the inside of the control center door for correct wiring of the pump and the optional auto-drain and flush.

NOTE

Large evaporative coolers may require a separate power supply.

8 Model MSX Make-Up Air ®