Motormaster V Control Installation 580F240

Motor Mount — To ensure proper fan height, replace the existing motor mount with the new motor mount provided with accessory.

Transformer (460-v Units Only) — On 460-v units, a trans- former is required. The transformer is provided with the accessory and must be field-installed.

Motormaster® I Control — Recommended mounting location is on the inside of the panel to the left of the control box. The control should be mounted on the inside of the panel, verti- cally, with leads protruding from bottom of extrusion.

B. Motormaster V Control Installation (580F240 and 300)

Install Field-Fabricated Wind Baffles

Wind baffles must be field-fabricated for all units to ensure proper cooling cycle operation at low ambient temperatures. See Fig. 22 for baffle details. Use 20-gage, galvanized sheet metal, or similar corrosion-resistant metal for baffles. Use field-supplied screws to attach baffles to unit. Screws should be 1/4-in. diameter and 5/8-in. long. Drill required screw holes for mounting baffles.

CAUTION: To avoid damage to the refrigerant coils and electrical components, use recommended screw sizes only. Use care when drilling holes.

Install Motormaster V Controls

The Motormaster V control is a motor speed control device which adjusts condenser fan motor speed in response to declining liquid refrigerant pressure. A properly applied Motormaster V control extends the operating range of air- conditioning systems and permits operation at lower outdoor ambient temperatures.

The minimum ambient temperatures at which the unit will operate are:

TEMPERATURE OPERATING LIMITS — F°

Standard	Unit with	Unit with
Unit	Low Ambient Kit	MMV Control
40	25	–20

To operate down to the ambient temperatures listed, Motormaster V controls (Fig. 24) must be added. Field- fabricated and installed wind baffles are also required for all units (see Fig. 22). The Motormaster V control permits opera- tion of the unit to an ambient temperature of –20 F. The con- trol regulates the speed of 3-phase fan motors that are compatible with the control. These motors are factory installed.

See Table 6 for the Motormaster V control accessory package usage. Table 7 shows applicable voltages and motors. Replacement of motor or fan blade IS NOT REQUIRED ON CURRENT PRODUCTION UNITS since the control is compatible with the factory-installed fan motors. Only field wiring control is required.

Install the Motormaster V control per instructions supplied with accessory.

Table 6 — Motormaster V Control Package Usage

UNIT	VOLTAGE	ITEM DESCRIPTION
580F180-300	208/230	CRLOWAMB015A00

	460	CRLOWAMB016A00
	460	CRLOWAMB016A00

Table 7 — Applicable Voltages and Motors

VOLTAGE	COMPATIBLE MOTOR
208/230-3-60	HD52AK654
460-3-60	HD52AK654

NOTE: Dimensions in ( ) are in mm.

Fig. 22 — Wind Baffle Details

SENSOR	SENSOR
LOCATION	LOCATION

HAIRPIN END

580F180580F210

NOTE: All sensors are located on the eighth hairpin up from the bottom.

Fig. 23 — Motormaster I Sensor Locations

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580F specifications

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