Setting The Domestic Hot Water Temperature; Handing The Product Over To The End User; 10 Troubleshooting; Eliminating Faults - Vaillant ecoFIT sustain 825 Installation And Maintenance Instructions Manual

1
Regulate the pressure using the adjusting screw (1).
▶
Position of the adjusting
screw
Right-hand stop (screwed
all the way in)
Mid-position (six anti-
clockwise rotations)
Five further anti-clockwise
rotations starting from the
mid-position
Install the front casing. (→ Page 9)
▶
8.4

Setting the domestic hot water temperature

1. Observe the applicable regulations regarding legionella
prevention.
Danger!
Risk of death from legionella.
Legionella multiply at temperatures below
60 °C.
Ensure that the end user is familiar with
▶
all of the Anti-legionella measures in order
to comply with the applicable regulations
regarding legionella prevention.
2. Set the domestic hot water temperature.
Condition: Water hardness: > 3.57 mol/m³
– Domestic hot water temperature: ≤ 50 ℃
3. Descale the water as required.
9 Handing the product over to the end
user
At the time of commissioning complete all relevant sections
of the Benchmark, located at the rear of this document.
When you have finished the installation, affix the en-
▶
closed sticker (which requests that the user reads the
instructions) to the front of the product in the end user's
language.
Explain to the end user how the safety devices work and
▶
where they are located.
Inform the end user how to handle the product.
▶
In particular, draw attention to the safety warnings which
▶
the end user must follow.
0020230529_04 ecoFIT sustain Installation and maintenance instructions

Handing the product over to the end user 9

Notes/application
If the radiators do not heat
up sufficiently at the default
setting. In this case, you must
set the pump to the maximum
speed.
Default setting
If noises are produced in the
radiators or radiator valves.
Inform the end user that they must have the product
▶
maintained in accordance with the specified intervals.
Pass all of the instructions and documentation for the
▶
product to the end user for safe-keeping.
Inform the end user about measures taken to ensure the
▶
combustion air supply and flue system, and instruct the
end user that he must not make any changes.
Inform the end user that they must not store or use explo-
▶
sive or highly flammable substances (such as petrol, pa-
per or paint) in the installation room of the product.
Complete and sign off the Benchmark commissioning
▶
check list.
Complete and sign off the guarantee documentation.
▶

10 Troubleshooting

10.1

Eliminating faults

If fault messages (F.xx) appear, eliminate the fault after
▶
referring to the table in the appendix or using the check
programmes. (→ Page 15)
Overview of fault codes (→ Page 33)
If several faults occur at the same time, the display shows
the corresponding fault messages for two seconds each in
alternation.
Press (max. three times) to restart the product.
▶
If you are unable to eliminate the fault and the fault re-
▶
curs despite reset attempts, contact customer service.
10.2

Procuring spare parts

The original components of the product were also certified
by the manufacturer as part of the declaration of conformity.
If you use other, non-certified or unauthorised parts during
maintenance or repair work, this may void the conformity of
the product and it will therefore no longer comply with the
applicable standards.
We strongly recommend that you use original spare parts
from the manufacturer as this guarantees fault-free and safe
operation of the product. To receive information about the
available original spare parts, contact the contact address
provided on the back page of these instructions.
If you require spare parts for maintenance or repair
▶
work, use only the spare parts that are permitted for the
product.
10.3

Calling up and clearing the fault memory

The last 10 fault messages are stored in the fault memory.
Call up the installer level. (→ Page 15)
▶
Navigate to the fault codes.
▶
The number of faults that have occurred is shown in
◁
the display and the faults that are currently called up
are displayed with their fault numbers F.xx.
Press or to call up individual fault messages.
▶
To delete the entire fault list, navigate to diagnostics code
▶
D.094 in the installer level.
Set the diagnostics code to 1, and confirm by pressing
▶
.
21