48
Lubrication
COMPRESSORS — Each compressor is charged with correct
amount of oil from the factory.
FAN MOTOR BEARINGS —
Fan motor bearings are per-
manently lubricated.
No further lubrication of condenser-fan or
evaporator-fan motors is required.
Condenser-Fan Adjustment (Fig. 56)
1. Shut off unit power supply and install lockout tag.
2. Remove condenser-fan assembly (grille, motor, motor
cover, and fan) and loosen fan hub setscrews.
3. Adjust fan height as shown in Fig. 55.
4. Tighten setscrews and replace condenser-fan assembly.
Belt/Pulley Adjustment —
Inspect once each season
or sooner if conditions warrant, verifying that belt tension and
pulley alignment are correct. Replace belt if required.
EconoMi$er IV Adjustment —
Refer to Optional
EconoMi$er IV and EconoMi$er2 section on page 18.
Refrigerant Charge —
Amount of refrigerant charge is
listed on unit nameplate (also refer to Table 1). Refer to Carrier
Standard Service Techniques Manual, Chapter 1, Refrigerants
section.
Unit panels must be in place when unit is operating during
charging procedure.
NO CHARGE — Use standard evacuating techniques. After
evacuating system, weigh in the specified amount of refriger-
ant (refer to Table 1).
LOW CHARGE COOLING — Use Cooling Charging Charts,
Fig. 56-59. Vary refrigerant until the conditions of the appropri-
ate chart are met. Note that charging charts are different from
the type normally used. Charts are based on charging the units
to the correct superheat for the various operating conditions.
Accurate pressure gage and temperature sensing device are re-
quired. Connect the pressure gage to the service port on the
suction line. Mount the temperature sensing device on the suc-
tion line and insulate it so that outdoor ambient temperature
does not affect the reading. Indoor-air cfm must be within the
normal operating range of the unit.
HUMIDI-MIZER™ SYSTEM CHARGING — The system
charge for units with the Humidi-MiZer adaptive dehumidifi-
cation system is greater than that of the standard unit alone.
The charge for units with this option is indicated on the unit
nameplate drawing. Also refer to Fig. 60-62. To charge sys-
tems using the Humidi-MiZer adaptive dehumidification
system, fully evacuate, recover, and recharge the system to the
nameplate specified charge level. To check or adjust refrigerant
charge on systems using the Humidi-MiZer adaptive dehumid-
ification system, charge per Fig. 60-62.
NOTE: When using the charging charts, it is important that
only the subcooling/reheat dehumidification coil liquid line
solenoid valve be energized. The subcooling/reheat dehumidi-
fication coil liquid line solenoid valve MUST be energized to
use the charging charts and the outdoor motor speed controller
jumpered to run the fan at full speed.
The charts reference a liquid pressure (psig) and temperature
at a point between the condenser coil and the subcooling/reheat
dehumidification coil. A tap is provided on the unit to measure
liquid pressure entering the subcooling/reheat dehumidification
coil.
IMPORTANT: The subcooling mode charging charts
(Fig. 60-62) are to be used ONLY with units having the
optional Humidi-MiZer subcooling option. DO NOT use
standard charts (Fig. 56-59) for units with Humidi-MiZer
option, and DO NOT use Fig. 60-62 for standard units.
Fig. 52 — Cleaning Condenser Coil
Fig. 53 — Propping Up Top Panel
Fig. 54 — Separating Coil Sections
Fig. 55 — Condenser-Fan Adjustment
UNIT
VOLTAGE
FAN HEIGHT
“A” (in.)
208/230 v
2.75
460 v and 575 v
3.50
