Index ................................................................................... 14
2Instructions for use auroFLOW plus 0020160592_00
Safety 1
1Safety
1.1Action-related warnings
Classification of action-related warnings
The action-related warnings are classified in accordance
with the severity of the possible danger using the following
warning signs and signal words:
Warning symbols and signal words
Danger!
Imminent danger to life or risk of severe personal
injury
Danger!
Risk of death from electric shock
Warning.
Risk of minor personal injury
Caution.
Risk of material or environmental damage
1.2General safety information
1.2.1Installation by competent persons only
Only an approved competent person is permitted to carry out
installation, inspection, maintenance and repair work on the
product.
1.2.2Danger due to incorrect handling
▶ Read through these instructions carefully.
▶ Observe the general safety information and warnings for
all tasks that involve the Vaillant product.
▶ Perform all tasks only as described in this manual.
1.2.3Risk of burns from components through
which solar fluid flows and heating water
pipes
In solar mode, components through which solar fluid flows,
such as collectors and solar lines, as well as the heating
water pipes, reach extremely high temperatures. Touching
these components may result in serious personal injury.
▶ Only touch these components if you have first checked
the temperature.
1.2.4Danger due to changes in the product
environment
There is a risk of injury or death to the operator or others, or
of damage to the product and other property, in the event of
changes to the product environment. Changes must not be
made to the following:
– the product,
– the product environment,
– the solar fluid, heating water and power supply lines,
– the discharge line and the collecting container for the
solar fluid,
– the drain line and expansion relief valve for the heating
water,
– the structural conditions that may affect the operational
safety of the product.
▶ Never shut down the safety devices.
▶ Do not tamper with any of the safety devices.
1.2.5Damage to the building as a result of
leaking water
Leaking water may cause damage to the building structure.
▶ If there is a possibility of leaks in the pipework, close the
service valves immediately.
▶ Have any leaks remedied by a heating specialist com-
pany.
1.3CE label
The CE label shows that the products comply
with the basic requirements of the applicable guidelines as
stated on the identification plate.
1.4Intended use
There is a risk of injury or death to the user or others, or of
damage to the product and other property in the event of
improper use or use for which it is not intended.
The product is designed for use in solar systems. The
Vaillant solar system is used for solar heating support or
hot water generation. The product must only be operated
in the solar circuit with Vaillant ready-mixed solar fluid. The
product has been specially developed for the Vaillant solar
collectors auroTHERM (VFK 135 VD and VFK 140 VD). The
components in the solar circuit have been developed for use
with Vaillant solar fluid.
Intended use includes the following:
– observing the included operating, installation and servi-
cing instructions for the Vaillant product and any other
system components
– compliance with all inspection and maintenance condi-
tions listed in the instructions.
This product is not designed to be used by persons (including children) with limited physical, mental or sensory capabilities or by persons who do not have enough experience
and/or knowledge, unless they are supervised by a person
who is responsible for their safety or have been instructed by
him/her about how to use the product.
Children must be supervised to ensure that they do not play
with the product.
The use of the product in vehicles, such as mobile homes
and caravans, is not classed as intended use. Units that are
not classed as vehicles are those that are installed in a fixed
and permanent location (known as "fixed installation").
Installing and using the product in locations where there is
a risk of exposure to damp or splashed water constitutes
improper use.
Any other use that is not specified in these instructions, or
use beyond that specified in this document shall be considered improper use. Any direct commercial or industrial
use is also deemed to be improper.
Caution.
Improper use of any kind is prohibited.
0020160592_00 auroFLOW plus Instructions for use3
2 Notes on the documentation
1
2
3
1
2
3
2Notes on the documentation
2.1Original instructions for use
These instructions are the original instructions for use within
the context of the machine directive.
2.2Observing other applicable documents
▶ You must observe all operating instructions enclosed with
the system components.
2.3Storing documents
▶ Keep this manual and all other applicable documents
safe for future use.
2.4Applicability of the instructions
These instructions apply for the following only:
Product types and article numbers
VPM 15 D basic module
VPM 30 D expansion module
The 10-digit article number of the product is the seventh to
sixteenth number of the serial number (→ Page 12).
The article number can also be found on the identification
plate, which is fitted in the factory on the underside of the
product.
0020133195
0020133196
3.1.2Design of coordinated system examples
1 Collector field with max-
imum six collectors (VFK
135 VD or VFK 140 VD)
A typical example for the use of the basic module of the
auroFLOW plus solar charger is solar-supported heating
in a single-occupancy house. Cylinder cascades and swimming pool heating are possible.
2 auroFLOW plus basic
module
3 Buffer cylinder
3System
3.1System characteristics
3.1.1Basic principles of the system
The auroFLOW plus solar system acts as a heat generator
in a hot water heating installation with a buffer cylinder. In order to cover the basic load and potential peak loads of the
heat demand, various heat generators are used in solar-supported heating installations, e.g. heat pumps, block heating
and generating plants and gas boilers. The hot water generation can be combined with the buffer cylinder.
The auroFLOW plus solar system comprises:
– Collector field
– auroFLOW plus solar charger
– Buffer cylinder
– Solar lines
– Heating water pipes
In addition, a system controller can be used to control all
components of the heating installation, e.g. the auroMATICVRS 620.
1 Collector field with max-
imum 12 collectors (VFK
135 VD or VFK 140 VD)
A typical example for the use of the basic module and expansion module of the auroFLOW plus solar charger is
solar-supported production of hot water in multiple-occupancy houses. Cylinder cascades and swimming pool heating are possible.
For even larger applications, up to four solar chargers (basic
module and expansion module) can be cascaded. The collector field can then be made up of up to 48 collectors.
2 Basic module and expan-
sion module auroFLOW
plus
3 Buffer cylinder
4Instructions for use auroFLOW plus 0020160592_00
System 3
1
2
T5
T1
T3
T2
T4
T6
P3
P2
P1
STW1
STW2
3
9
8
7
4
6
5
Flowsensor
3.1.3Functionality
The way the auroFLOW plus solar system operates is different to many other solar systems. The auroFLOW plus
solar system is not completely filled with solar fluid and it is
not under pressure. For this reason, some of the otherwise
standard components for solar systems, such as the expansion vessel, pressure gauge and air vent, are not fitted.
– The fluid capacity of the collector field and the solar lines
is precisely designed with the solar system in mind.
– The minimum length and the maximum length of the
solar lines must be observed
– All solar lines have defined diameters in relation to
the number of collectors
– The use of corrugated hoses impairs the functionality
of the solar system
– The design and number of collectors must not be
changed
– The physical properties of the solar fluid are also an im-
portant contributing factor to the fault-free operation of
the system. Therefore, only original Vaillant solar fluid
without additives may be added to the system.
3.1.4Product function
When the solar pump is idle, the solar fluid is collected in
the storage tank. The collector field and all solar lines are
installed with downward gradients, to ensure that the solar
fluid flows back to the solar charger. The solar lines and the
collector field are then filled with air. The solar fluid is a special ready-mixed water/glycol fluid that is added to the solar
system during installation by the competent person.
The way the basic module of the solar charger operates is
described below.
If the expansion module is also installed,
– the solar fluid volume is doubled by a separate storage
tank connected in parallel
When the solar control activates the solar pump, the solar
pump pumps the solar fluid from the storage tank through
the solar return into the collector field. The solar fluid is
heated at this point, before flowing back to the solar charger
via the solar flow pipe.
– When the solar pump is idle, there is air in the collectors
and solar lines. Frost protection measures are therefore
only required for the installation site of the solar charger.
– The collector field and solar lines, and especially the
downward gradient of the lines, must be installed as specified to ensure that the solar system functions correctly.
– the pump output is higher as a result of two solar pumps
connected in series
The way the solar charger operates remains the same, however.
When the solar pump is idle, only the storage tank (8) contains solar fluid. The collectors (1) and solar lines (2) and (9)
are then filled with air.
The solar control in the solar charger activates the solar
pump whenever
– the temperature difference between the collector temper-
ature sensor (T5) and cylinder temperature sensor (T6) is
at least 15 K (if a system controller is connected, the cylinder temperature is transmitted to the solar control via
the eBUS line)
– the cylinder temperature is lower than the set maximum
cylinder temperature
0020160592_00 auroFLOW plus Instructions for use5
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