Acapella Installation Guide
25
Wiring The System
en
7
Installation
Indications,
functions and options
Messages
Operation and function
2.4 System: Standard solar system with 1 store
The controller calculates the temperature difference between collector sensor S1
and store sensor S2. If the difference is larger than or identical to the adjusted
switch-on temperature difference (DT O), the solar pump will be activated by the
relay, and the store will be loaded until the switch-off temperature difference (DT F)
or the maximum store temperature (S MX) is reached.
Sensor S3 can optionally be connected for measurement purposes.
If heat quantity measurement (OHQM) is activated, S3 is to be used as the return
sensor.
Netz
Mains
3
3
2
2
2
2
S1
S2
S3
PWM
R1
VBus
1
2
3
4
5
6
7
8
9 10
12 13 14
15 16 17 18 19 20
N
N
L
S1
S2
R1
S3
The controller calculates the temperature difference between collector sensor S1 and store sensor
S2. If the difference is larger than or identical to the adjusted switch-on temperature difference (DT
O), the solar pump will be activated by the relay, and the store will be loaded until the switch-off
temperature difference (DT F) or the maximum store temperature (S MX) is reached. Unlike the dia-
gram above we recommend that S3 is inserted to the top cylinder sensor pocket.
Do not crosswire the power
cable with the comms cable
on the solar pump. If you do
this you will see a flashing
green light on the pump.
Commissioning
It is important that a motorised flush and fill centre is used to fill and pressurise the system with
solar fluid as follows:
• Connect fill hose to H and connect flush hose to I.
• Close the isolating valve above to the flow meter to ensure all air and liquid passes through the
fill centre to filter any air and contaminants.
• Allow the flush pump to run for 1 minute. Close I and pressure the solar system to 4bar. Close
H once this is reached. Shut off solar fill pump.
• Allow system to stand at 4bar pressure to make sure there is no leaks.
• After this process is completed without any leaks being present open I and H and allow the flush
pump to run.
• While flush pump is running slightly open connections on expansion vessel, pump station and
coil. This will allow any air trapped locally to exit the system easier.
• After this has been completed allow flush pump to run for a further 15 minutes.
• Once you are confident there is no more air in the system (you will be able to see air in the sys-
tem through the flow meter and also by noise it makes), close I first.
• Allow the system to re-pressurise to 2bar. Once achieved, close H and shut off flush pump.
• Not turn on the power supply to the solar controller.
To set up the controller
refer to Manual supplied
in the box with the con-
troller.
