38
Electronic Bypass Controller Installation and Commissioning Guide
7.5 Startup for Cooling Tower - Fan and/or Pump Applications
Task
Parameter #
Menu “0”
Parameter #
Fan
Settings
Pump
Settings
Action
Parameter Notes
Minimum Speed
1.007
0.01
15Hz
30-45Hz
Press M For Marley Towers with Gear-
reducer, you can set this at 0Hz.
Otherwise, fan may run at 15 Hz
if no sleep/wake mode, or run
signal interruption occurs. Pump
Min Speed will be dependent on
Pump Manufacturer. Check with
equipment manufacturer when
in doubt
Accel Rate
2.011
0.012
100-300
16.7
Press M Fan Accel is dependent on
HP and load. Cooling Tower
recommended to be 120
Decel Rate
2.021
0.013
100-500
16.7
Press M Fan Decel is dependent on HP
and load. Too low of a Decel
Rate can result in a “DC Bus
Overvoltage” trip on large fans.
Cooling Tower recommended
to be 120
Volt Mode Select
5.014
0.014
Fixed
Fixed
Press M Use Sre if OV faults persist after
adjusting Decel rate
Low Frequency
Voltage Boost
5.015
0.016
0.5
0.5
Press M
Dynamic V/F Flux
optimize
5.012
0.015
On
On
Press M
Insert Motor RPM
5.008
0.019
Motor
RPM
Motor
RPM
Press M Read Motor Name plate (ie.
1755?) - Put in Sync Speed
Insert Motor FLA
5.007
0.02
Motor FLA Motor FLA
Press M Read Motor Name Plate Amps
Maximum Switching
Frequency
5.006
0.021
Only raise if there is an audible
noise issue
Catch a spinning
motor
6.009
0.023
1
1
Press M Detects Positive and Negative
Frequencies
T7 Analog input 2
7.011
0.027
20-Apr
20-Apr
Press M Factory default is 4-20 ma. If 0 -
10 VDC, change default
Change Security
Status
11.044
0.031
L2
L2
PressOff/
reset
This allows access to advanced
Menu Parameters
Save parameters to
Smart Card
11.042
0.033
Prog
Prog
Set Date
6.016
0.034
mm/dd/yy mm/dd/yy Press M
Set Time
6.017
0.035
HH.MM
HH.MM
Press M This is in Military Time
Set Date & Time
6.019
0.037
Set
Set
Press M Allows inputting of Date & Time
Turn off Set Date &
Time set ability
0.037
Local
Menu
Local
Menu
Press M This makes 0.034 & 0.035 “read
only”
Set Auto Reset
after trip
10.034
0.048
5
5
Number of attempts
Set Auto Reset delay
to 10 seconds
10.035
0.049
10
10
Time delay between attempts
Controller Gain - Kp
4.013
50
50
Controller Gain - Ki
4.014
5
5
Thermal Protection
Mode
4.016
On
Off
(Default)
Speed Fold-back on Current
Limit
Full Power Breaking
Time
10.03
0
0
To disable It.Br fault
Full Power Breaking
Period
10.031
0
0
Save Advanced
Menu Parameters
10
1000
1000
Saves Parameters to
Secure Location on
SmartCard
10
3100
3100
Can extract Parameters by
setting 6100 in Pr XX.00
Maintenance:
Read last 10 faults
10.020-10.029
0.050 - 0.059
Most recent trip is P0.050
Date & Time Stamp
for last 10 faults
10.041-10.060
0.60 - 0.79
Most recent date/time stamp is
P0.060 & P0.061
Menu “0” Parameters for use with HVAC Drive H300 only.