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Janson Controls Technologies (Shenzhen) Co.,Limited 3
HOME > CASE STUDY > CONSTANT PRESSURE WATER SUPPLY
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CONSTANT PRESSURE WATER SUPPLY

CONSTANT PRESSURE WATER SUPPLY

1. Constant Pressure Water Supply

1, Load feature
   (1) PID function is required.

   (2) There is a pressure sensor in the system.

   (3) In theory, if the running frequency is H1, then

        Energy Saving = 1-(H1/50)3
.
2,  Requests for frequency inverters (VFD)
   (1) Soft start the motor, reduce the surge current.

   (2) PID control should be stable and accurate.

.
3,  Typical wiring diagram


4,  Parameters setting list

No.

Function codes

Default

Setting value

Explanation

1

F00.01

0

1

Start / stop by external   signal (If necessary)

2

F00.06

0

8

PID control

3

F10.00

0

0

PID target value set by   F9-01

4

F10.01

50%

--

Set suitable value depend on   system

6

F09.50 ~ F09.52

--

--

Set suitable dormancy and   wake up parameters.


5,  Notices
(1) select a suitable pressure sensor, the calculation of Fb-01 as below  if the pressure sensor measure range is 16bar (1.6Mpa), and the  target pressure is 5bar (0.5Mpa), then 
F10.01=5/16*100%=31.3%.

(2) Maintenance regularly, pay attention to dust and humidity prevention.