Service; Cleaning Evaporator And Condenser Coils; Lubrication; Condenser Fan Adjustment - Carrier Omnizone 50XCA06 Installation, Start-Up And Service Instructions Manual

1. When the drive first starts, system will prompt to run the Car-
rier Configuration Assistant. Exit this option.
2. Configure the drive parameters by pressing the menu button
and using the arrow keys to select "Parameters," then press
the enter key.
3. Move to the appropriate sub-group using the arrow keys (first
two digits of the parameter to be changed), then press <SEL>.
4. Select the parameter to view or change using the arrow keys.
Change a parameter by scrolling to that parameter and press-
ing <EDIT>.
5. Select the New Value, then press <SAVE>.
Table 18 — VFD Head Pressure
Control Parameters
PARAMETER PARAMETER
INDEX FUNCTION
9902 Application Macro
9906
Motor Nominal Voltage
9907 Motor Nominal Current
9908 Motor Nominal Speed
9909 Motor Nominal Power
1102 EXT 1 - EXT 2 SEL
1301 AI-1 Minimum
1302
AI-1 Maximum
1304 AI-2 Minimum
1305 AI-2 Maximum
1501 AO1 Content
2007 FREQUENCY MIN
2202 Acceleration Time
2203
Decel Time
OUTPUT 1
3404
DISPLAY FORM
OUTPUT 2
3408
PARAMETER
3409 SIGNAL 2 MIN
3410
SIGNAL 2 MAX
3412 OUTPUT 2 UNITS
3413 OUTPUT 2 MIN
3414 OUTPUT 2 MAX
OUTPUT 3
3415
PARAMETER
3416
SIGNAL 3 MIN
3417 SIGNAL 3 MAX
3419 OUTPUT 3 UNITS
3420 OUTPUT 3 MIN
3421 OUTPUT 3 MAX
4001
PID GAIN
4002
PID INTEGRATE
4003 DERIVATION TIME
ERROR VALUE
4005
INVERTED
4006 UNITS
4008
0% VALUE
4009 100 % VALUE
4010 SET POINT SELECT
4011 INTERNALSET POINT
4014 Feedback Select
4017 ACT-2 Input
SELECTION
1 (HVAC Default)
Unit Voltage
(use value on nameplate)
Motor FLA
(use value on nameplate)
1750
Motor HP
(use value on nameplate)
EXT 2
5%
45%
5%
45%
122 (RO1-3 Status)
30.0 HZ
10 s
11 s
Direct
PID 1 SETPOINT
0.0 PSI
667.0
PSI
0.0 PSI
667.0
PID 1 FEEDBACK
0.0 PSI
667 PSI
PSI
0.0 PSI
667 PSI
0.7
5 s
DISABLE
YES
PSI
0.0 PSI
667 PSI
INTERNAL
300.0
7 [Max(A1, A2)]
1 (AI1)
34
Table 19 — Motor FLA Values (208/230-v, 460-v)
HP 208/230V
0.50
0.75
1.00
1.50
2.00
3.00
Table 20 — Motor FLA Values (575-v)
HP
0.50
0.75
1.00
1.50
2.00
3.00

SERVICE

Cleaning Evaporator and Condenser Coils

Do not use high-pressure water or air. Damage to fins may result.
Clean coils with a vacuum cleaner, fresh water, compressed air, or
a bristle brush (not wire). Backflush coil to remove debris. Com-
mercial coil cleaners may also be used to help remove grease and
dirt. Steam cleaning is NOT recommended.
Units installed in corrosive environments should be cleaned as
part of a planned maintenance schedule. In this type of applica-
tion, all accumulations of dirt should be cleaned off the coil.

Lubrication

The 50XCA06-24 evaporator fans and 50XCA06-14 condenser
fans have permanently lubricated bearings.

Condenser Fan Adjustment

To prevent personal injury, be sure wire fan guards (provided by
customer) are secured in place over each fan discharge (or that
fans are ducted) before starting the unit.
TO CHANGE FAN SPEED
1. Shut off unit power supply. Lock out power supply and tag
disconnect locations.
2. Loosen fan belt by loosening fan motor belt adjusting bolts.
Do not loosen fan motor mounting bracket from unit.
3. Loosen movable pulley flange setscrew (Fig. 21).
4. Screw movable flange toward fixed flange to increase fan
speed and away from fixed flange to decrease speed. Increas-
ing fan speed increases load on motor. Do not exceed maxi-
mum allowable fan speed or motor full load amps indicated
on unit nameplate. See Tables 2 and 3 for electrical data.
5. Set movable flange setscrew at nearest flat of pulley hub and
tighten setscrew.
6. Check pulley alignment and belt tension adjustment as
described below.
7. Check fan operation. Repeat above procedure as required.

Pulley Alignment

Shut off unit power supply. Lock out power supply and tag discon-
nect locations. Loosen fan motor pulley setscrews and slide fan
pulley along fan shaft. Make angular alignment by loosening mo-
tor from mounting bracket. Check alignment with a straightedge
(see Fig. 21).
460V
2.2 1.1
2.6 1.3
3.4 1.5
4.6 2.1
6.0 2.8
9.2 4.3
575V
0.9
1.0
1.1
1.6
2.1
3.4