Xylem Lowara AQUAVAR IPC Guia De Inicio Rapido página 15

Booster
Ramp
Ramp 1 Ramp 2
time
Up Down Up
Fast 4 4 70
Medi- 6 6 70
um
Slow 8 8 70
The ramp is expressed in seconds and represents the time needed for
the motor to go from 0 Hz to the maximum frequency, or from maxi-
mum frequency to 0 Hz.
Ramp 1 (up or down) is always used below minimum frequency/sleep
frequency and when feedback value is outside the regulation band.
Ramp 2 (up or down) is used when feedback value is inside the regu-
lation band.
The motor control will use the ramp-up (1 or 2) till the feedback value
reaches the upper limit of the regulation band. Once the upper limit is
reached, the motor control will use the ramp-down (1 or 2) till the feed-
back value reaches the lower limit of the regulation band.
Parameter
3–41
3–42
3–51
3–52
Figure 6: Chart
1. Setpoint
2. Control feedback (actual value)
3. Regulation band
4. Sleep delay
5. Sleep frequency
6. Output frequency
7. Regulating with Ramp 2 Up and Ramp 2 Down (slow ramps)
®
Lowara Aquavar QUICK START GUIDE
HVAC
Ramp 1 Ramp 2
Down Up Down Up
70 8 8 90
70 12 12 90
70 16 16 90
Description
Ramp 1 Ramp Up Time
Ramp 1 Ramp Down Time
Ramp 2 Ramp Up Time
Ramp 2 Ramp Down Time
4.2 Speed Control External Analog Signal detail
Down
90
90
90
1. Max Speed Reference
2. Wake-up Speed
3. Minimum/Sleep Speed
4. Terminal 53 Low Ref./Feedb. Value
5. Analog value corresponding to Sleep Speed
6. Analog value corresponding to Wake-up Speed
7. Terminal 53 High Ref./Feedb. Value
Note: if Sleep Mode is disabled, when the analog value is below Sleep
Speed the pump will run at Sleep Speed.
Example of settings for analog input 53 (4-20 mA):
Max Speed Reference = 50 (Hz)
Minimum/Sleep Speed = 20 (Hz)
Wake-up Speed = 25 (Hz)
Terminal 53 Low Ref./Feedb. Value = 0
Terminal 53 High Ref./Feedb. Value = 50
The analog value corresponding to Sleep Speed is:
Signal range*(Min Speed/Max Speed) + zeropoint 16 * (20 / 50) + 4 =
10,4 (mA)
The analog value corresponding to Wake-up Speed is:
Signal range*(Wake-up Speed/Max Speed) + zeropoint 16 * (25 / 50) +
4 = 12 (mA)
4.3 Autoset Parameters Extract
Following parameters are an extract of Auto-set configuration that is
performed in Start-up Genie procedure.
Number
4–12
20–00
20–14
22–50
22–21
19–24
19–25
3–10.0
en - Original instructions
= Sleep Mode disabled
= Sleep Mode enabled
Parameter Pressure / Lev-
el
Sleep Frequen- 20
cy/Low Limit
[Hz]
Feedback 1 AI 53
Source
Maximum Ref- 10
erence/Feedb.
End of Curve off
Function
Low Power De- Disabled
tection
No Flow Shut- Enabled
down
No Flow Re- 0,2
start Difference
Preset Refer- 2,50%
ence
Flow
20
AI 53
100
off
Disabled
Disable
0,2
2,50%
15