Setting The Job Fla; Tables C And D: Job Fla Calculation - Johnson Controls Frick vyper VYA PG -46 Service Manual

S100-200 IOM (MAY 08)
Page 44

SETTING THE JOB FLA

The fi nal item for setup of the Vyper
FLA via trim pot on the Vyper
a value for the Job Full Load Amps (FLA). The adjustment
is performed at two locations; the fi rst is the trim pot on the
logic board mounted on the right door of the Vyper
See Figure 51.
Figure 51 - Logic Board Inside Right Cabinet Door
The trim pot is located on the Vyper
mounted in the center of the right cabinet door. See Figure
49. The trim potentiometer ( trim pot) is a small blue rectan-
gular component located on the left side of the Vyper
board. See Figure 52. The trim pot can be adjusted by a small
straight screw driver.
VYPER
™
™
is adjusting the Job
™ Logic board. The trim pot sets
™
cabinet.
™ Logic board which is
™
Logic
VARIABLE SPEED DRIVE
OPERATION
Figure 52 - Location of Trim Pot on Logic Board
Once the trim pot is located, the calibration can be viewed
by performing the steps shown on the next page on the
Quantum ™ LX panel screen.
Access the Vyper
shown in Figure 53.
The trim pot on the Vyper
represent the Job FLA based on the guidelines in Table C.
With a small, fl at screw driver, rotate the trim pot control until
the desired Job FLA setting is achieved. The Quantum
screen will provide feedback to the operator as the adjust-
ment is made. Close the Vyper
the door latches.
Once the Job FLA is set the installation of the drive should
be complete.
NOTE: If Logic Board is replaced, the Job FLA must be
reset to the proper value using the Job FLA Trim Pot.

Tables C and D: Job FLA Calculation

Line
1 "Applied Motor FLA" *
2 Motor Service Factor
3 Multiply Line 1 x Line 2
4 HP Rating of Vyper Drive
Vyper Amp Limit
5 If Line 4 is 305 / 254 HP, Value is 380 A
If Line 4 is 437 / 362 HP, Value is 565 A
6 Multiply Line 5 x 1.05
* See SETTING THE MOTOR SCREEN section
Table D: Job FLA Calculation
If in Table C
Line 3 is Less than Line 6
Line 3 is greater than Line 6
Adjust the trim pot on the Vyper
FLA is identical to the value calculated in Table D.
™
Level 2 screen, described previously, as
™
Logic board must be adjusted to
™ cabinet and secure with
Table C: Limit Calculations
Parameter
= Line 3
= Line 5
™
Logic board until the Job
™
LX
Value
1.15
Job FLA