Maintenance 7
0020147164_09 aroTHERM Installation instructions
21
You can read the flow rate directly from the controller. De-
pending on the type of liquid in the heating circuit, the flow
rate displayed on the controller may be exaggerated.
Example: If you use a 30% mixture of propylene glycol and
the liquid temperature is 5 °C, you must subtract 400 l/h from
the value shown on the display.
▶
Use the following table to compare the various exaggera-
tion flow rate values depending on liquid type.
–
Applies for: VWL 55/2 A 230 V,
VWL 85/2 A 230 V,
VWL 115/2 A 230 V
Flow rate increase (l/h)
Temper-
ature
5 °C
Temper-
ature
15 °C
Temper-
ature
25 °C
Liquid
type
Water
0
0
0
60% alcohol
0
0
0
30% propylene
glycol
400
240
120
50% propylene
glycol
650
500
400
30% ethylene
glycol
120
0
0
50% ethylene
glycol
400
140
50
–
Applies for: VWL 155/2 A 230 V
Flow rate increase (l/h)
Temper-
ature
5 °C
Temper-
ature
15 °C
Temper-
ature
25 °C
Liquid
type
Water
0
0
0
60% alcohol
0
0
0
30% propylene
glycol
600
440
280
50% propylene
glycol
1050
740
580
30% ethylene
glycol
520
350
300
50% ethylene
glycol
880
680
540
Note
Insufficient purging may lead to deviations in the
flow rate.
▶
If you cannot reach the minimum flow rate, install an ad-
ditional pump.
▶
If you cannot reach the recommended flow rate, adjust
the heating circuit pressure on the controller and, if ne-
cessary, use a bypass valve (item 50).
6.12.3 Adapting the unit to the heating installation
The installation assistant is launched when the product is
switched on for the first time.
If you have already filled the heating installation and termin-
ated the installation assistant, but want to set the most im-
portant system parameters again, you can also call up the
Configuration
menu item.
Menu
→
Installer level
→
Configuration
6.12.3.1 Heat pump setting parameters
To individually set the heat pump, you can adjust certain
parameters in the
Configuration
menu.
Menu
→
Installer level
→
Configuration
Additional setting data is listed in the appendix.
Heat pump setting parameters (
6.13
Installing the side casing
C
C
B
A
▶
Install the side casing.
6.14
Instructing the end user
▶
Explain the how the system operates to the operator.
▶
Draw particular attention to the safety warnings, which
the end user must follow.
▶
Make the end user aware of the need for regular main-
tenance (maintenance contract).
▶
Explain to the end user how to check the system's water
volume/filling pressure.
7
Maintenance
7.1
Observing maintenance intervals
▶
Only carry out maintenance work if you are a competent
person.
▶
Carry out annual maintenance.
