P32-EN – Subject to technical changes 04.11
56
Additional Information for Installers
10.3.3 Setting and checking the solar circuits
The minimum speed levels of 22 (primary circuit) and
10 (secondary circuit) ensure a minimum flow for the
greatest assumable pressure loss in the solar circuits.
If the loss of pressure in the solar circuits is small, you
should adjust the minimum speed level to save drive
energy.
The maximum speed level must remain set to 30
.
Professional installation is a prerequisite for setting
the solar pump. Both solar circuits (primary and sec-
ondary circuit) must be professionally flushed and
bled of air, and their safety equipment must be prop-
erly installed. Install the sensors as described in
the installation instruction for the solar heat transfer
station (
Solvis document no.: P 40 or P 42
).
Set the speed control on both solar pumps to level three
and open the adjusting valve in the primary circuit com-
pletely (delivery state).
Setting the primary circuit:
•
Determine the minimum speed of the solar pump in the
primary circuit as follows:
- Calculating the minimum flow:
Absorber surface area [m²] x 10 [l/m² h]
60 [min/h]
- Determining the minimum speed:
Switch output 6 to “HAND/ON” (figure on right),
Lower the speed until the calculated volume flow has set.
This speed is the minimum speed level. Switch output 6
back to “AUTO”.
•
Setting the minimum speed level:
In the “Technician” operating mode (
page 25
), set the
minimum speed level as follows:
Press the “SERVICE” button in the function overview
to go to the main menu. In the main menu, select the
“Functions” entry by turning and pressing the rotary
wheel. In the functions menu that has just been dis-
played, select the “PID SOLAR1 PAR?” entry under “3:
PID CONTROL”. In the PID control menu, turn the rotary
wheel until the pointer is at “Minimal: 22” (
figure on
right
). Now you can press the wheel, turn it until the
required number is displayed, and press it again to set
the minimum speed level. Press the “BACK” button
three times to return to the function overview.
1 2 3 4 5 6 7 8 9 10 11 12 13 14
PID CONTROL
BROWSE
BACK
Current:
0
CORRECT. VARIABLE:
M
aximal:
30
M
inimal:
22
Set the minimum speed level by pressing, turning
and pressing the rotary wheel at the pointer
position
1 2 3 4 5 7 8 9 10 11 12 13 14
OUTPUTS
BROWSE
BACK
6: Solar Pump1
AUTO/OFF
PAR?
HAND/ON
PAR?
RPM stage:
22
7: Solar Pump2
6
Specify the speed level by pressing, turning and
pressing the rotary wheel at the pointer position
=
l
min
x
