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—17—
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.
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:
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
Table 7 — Applicable Voltages and Motors
CAUTION: To avoid damage to the refrigerant coils
and electrical components, use recommended screw
sizes only. Use care when drilling holes.
TEMPERATURE OPERATING LIMITS — F°
Standard
Unit
Unit with
Low Ambient Kit
Unit with
MMV Control
40 25 –20
UNIT VOLTAGE ITEM DESCRIPTION
580F180-300
208/230 CRLOWAMB015A00
460 CRLOWAMB016A00
VOLTAGE COMPATIBLE MOTOR
208/230-3-60 HD52AK654
460-3-60 HD52AK654
NOTE: Dimensions in ( ) are in mm.
Fig. 22 — Wind Baffle Details
SENSOR
LOCATION
HAIRPIN END
SENSOR
LOCATION
HAIRPIN END
NOTE: All sensors are located on the eighth hairpin up from the
bottom.
Fig. 23 — Motormaster I Sensor Locations
580F180 580F210