34
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
Table 19 — Motor FLA Values (208/230-v, 460-v)
Table 20 — Motor FLA Values (575-v)
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).
PARAMETER
INDEX
PARAMETER
FUNCTION
SELECTION
9902
Application Macro
1 (HVAC Default)
9906
Motor Nominal Voltage
Unit Voltage
(use value on nameplate)
9907
Motor Nominal Current
Motor FLA
(use value on nameplate)
9908
Motor Nominal Speed
1750
9909
Motor Nominal Power
Motor HP
(use value on nameplate)
1102
EXT 1 - EXT 2 SEL
EXT 2
1301
AI-1 Minimum
5%
1302
AI-1 Maximum
45%
1304
AI-2 Minimum
5%
1305
AI-2 Maximum
45%
1501
AO1 Content
122 (RO1-3 Status)
2007
FREQUENCY MIN
30.0 HZ
2202
Acceleration Time
10 s
2203
Decel Time
11 s
3404
OUTPUT 1
DISPLAY FORM
Direct
3408
OUTPUT 2
PARAMETER
PID 1 SETPOINT
3409
SIGNAL 2 MIN
0.0 PSI
3410
SIGNAL 2 MAX
667.0
3412
OUTPUT 2 UNITS
PSI
3413
OUTPUT 2 MIN
0.0 PSI
3414
OUTPUT 2 MAX
667.0
3415
OUTPUT 3
PARAMETER
PID 1 FEEDBACK
3416
SIGNAL 3 MIN
0.0 PSI
3417
SIGNAL 3 MAX
667 PSI
3419
OUTPUT 3 UNITS
PSI
3420
OUTPUT 3 MIN
0.0 PSI
3421
OUTPUT 3 MAX
667 PSI
4001
PID GAIN
0.7
4002
PID INTEGRATE
5 s
4003
DERIVATION TIME
DISABLE
4005
ERROR VALUE
INVERTED
YES
4006
UNITS
PSI
4008
0% VALUE
0.0 PSI
4009
100 % VALUE
667 PSI
4010
SET POINT SELECT
INTERNAL
4011
INTERNALSET POINT
300.0
4014
Feedback Select
7 [Max(A1, A2)]
4017
ACT-2 Input
1 (AI1)
HP
208/230V
460V
0.50
2.2
1.1
0.75
2.6
1.3
1.00
3.4
1.5
1.50
4.6
2.1
2.00
6.0
2.8
3.00
9.2
4.3
HP
575V
0.50
0.9
0.75
1.0
1.00
1.1
1.50
1.6
2.00
2.1
3.00
3.4
