Download Carrier 48TJD Specifications

MOTORMASTER®
V
CONTROL
INSTALLATION
(48TJ024,028
UNITS)
Install Field-Fabricated
Wind Baflles -- Wind baflles must
be field-fabricated for all units to ensure proper cooling cycle
operation at low ambient temperatures. See Fig. 21 for baflle
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 l/4-in, diameter and
5/8-in. long. Drill required screw holes for mounting baffles.
FROM FUSE BLOCK
10 o---1
>-
u
ca
1.2
1.3
o
o
To avoid dmnage to the refligerant coils and electrical components, use lecommended
screw sizes only. Use cme
when &'illing holes.
B
13B
Install Motormaster
V Controls
-The Motormaster
V
(MMV) control is a motor speed control device which adjusts
condenser fan motor speed in response to declining liquid lefrigerant 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
operate are:
mnbient temperatures
Unit
40
ooo
o
at which the unit will
TO MOTOR(S)
TEMPERATURE
Standard
o
TO PRESSURE
TRANSDUCER
OPERATING
Unit with
Low Ambient
25
Kit
Fig. 23 -- Motormaster
LIMITS -- F°
I
Unit with
I
MMV -20
Control
V Control
Table 6 -- Motormaster V Control Package Usage
To operate down to the ambient
temperatures
listed,
Motormaster V controls (Fig. 23) must be added. Field-fabricated and installed wind baffles gue _dso required for _dl units (see
Fig. 21). The Motormaster V control permits operation of the
unit to an ambient temperature of-20 IF.The control regulates the
speed of 3-phase fan motors that gue compatible with the control.
These motors me factory installed.
ITEM DESCRIPTION
48TJ024,028
UNIT
V control
per instructions
CRLOWAMB015A00
460
VOLTAGE
575
CR LOWAMB016A00
Table 7 -- Applicable
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.
Inst_dl the Motormaster
with accessory.
I
208/230
VOLTAGE
208/230-3-60
480-3-60
575-3-60
supplied
16
CRLOWAMB017A00
Voltages
and Motors
COMPATIBLE MOTOR
HD52AK654
HD52AK654
HD52GE576