Baldor MN850, Baldor Section Installation, Receiving, Inspection and Storage, Physical Location

Section 2

Installation

Receiving, Inspection and Storage

When you receive your control, there are several things you should do immediately.

1. Observe the condition of the shipping container and report any damage immediately to the commercial carrier that delivered your control.

2. Remove the control from the carton. Inspect for shipping damage and report any damage immediately to your commercial carrier.

3. Verify that the part number of the control you received is the same as the part number listed on your purchase order.

4. If the control is to be stored for several weeks before use, be sure that it is stored in a location that is clean, dry and free from corrosives and contaminants. Storage temperature range is –25°C to 55° C.

	Be sure to read an become familiar with the safety notices in Section 1 of this manual.
	Failure to observe the product safety notices can result in injury or equipment damage.
	If you have questions, please contact your Baldor distributor. Do not proceed unless you
	understand the installation and operation requirements and safety notices.
Physical Location	The location of the soft–start control is important. It should be installed in an area that is
	protected from direct sunlight, corrosives, harmful gases or liquids, dust, metallic
	particles, and vibration. Exposure to these elements can reduce the operating life and
	degrade performance of the control.
	Several other factors should be carefully evaluated when selecting a location for
	installation:
	1.	For effective cooling and maintenance, the control should be mounted vertically
		on a flat, smooth, non-flammable vertical surface. Heat dissipation of 3.3 watts
		per running FLA of the motor must be provided. All factory supplied enclosures
		provided adequate heat dissipation with ambient temperatures to 40° C.
	2.	If the control is mounted in an enclosure, sufficient air flow must be provided
		(see Table 2-1). The fan or blower must be rated for at least 0.8 cubic feet of
		30° C air per minute for each ampere of motor FLA rating.

Table 2-1 Air Flow Clearance Requirements

Soft–Start	Front	Top & Bottom	Sides
Size	inches (mm)	inches (mm)	inches (mm)
1	1 (25)	3 (75)	0.6 (15)
2	1 (25)	3 (75)	0.6 (15)
3	1 (25)	8 (200)	3.5 (90)

3.Keep high voltage and low voltage wiring separated. If the conduits must cross, be sure that they cross at 90° angles only.

4.Motor overload protection is required for motor branch circuits that do not have an overload protection device.

5.Front access must be provided to allow the control cover to be opened or removed for service and to allow viewing of the Keypad Display (1 inch (25mm) minimum).

6.Altitude derating. Up to 3300 feet (1000 meters), no derating required. Above 3300 feet, derate peak output current by 1% for each 330 feet above 3300 feet. 6600 feet (2000 meters) maximum.

7.Temperature derating. Up to 40° C, no derating required. Above 40° C, derate full load current by 2% per ° C above 40° C.

Maximum ambient is 60° C (at 40% derate).

8.Short circuit current and overcurrent devices are required for soft–start controls that do not have a circuit breaker or fusible disconnect switch.

9.Dust–proof NEMA 12, NEMA 4 non–ventilated enclosure will require an end of ramp Bypass contactor. This requires additional hardware. Refer to Figure 2-6 for details.

MN850 Installation 2-1