Setting The Bypass Valve; Setting The Hot Water Temperature; Handing The Product Over To The Operator; 10 Troubleshooting - Vaillant ecoFIT pure 825 Installation And Maintenance Instructions Manual

B
400
350
300
250
200
150
100
50
0
0 500
A Remaining feed head
[mbar]
B Flow rate [l/h]
8.3

Setting the bypass valve

Caution.
Risk of material damage caused by incor-
rect setting of the high-efficiency pump
If the pressure at the bypass valve is in-
creased (by turning it clockwise) and the
pump output is set to less than 100%, the
product may not operate correctly.
▶
In this case, set the pump output to
5 = 100% using diagnostics parameter
d.14.
Conditions: d.14 is set to 0 = auto
▶
Do not change the factory settings.
Conditions: d.14 is set to 1 - 5
▶
Remove the front casing. (→ Page 10)
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 10)
0020230531_01 ecoFIT pure Installation and maintenance instructions

Handing the product over to the operator 9

1
2
1000 1400 A
1 Max. PWM
2 Min. PWM
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.
8.4

Setting the hot water temperature

Danger!
Risk of death from Legionella.
Legionella multiply at temperatures below
60 °C.
▶
Ensure that the operator is familiar with all
of the Anti-legionella measures in order
to comply with the applicable regulations
regarding legionella prevention.
▶
Set the hot water temperature.
Conditions: Water hardness: > 3.57 mol/m³
– Hot water temperature: ≤ 50 ℃
9 Handing the product over to the
operator
▶
When you have finished the installation, attach the sticker
supplied (in the operator's language) to the product
cover.
▶
Explain to the operator how the safety devices work and
where they are located.
▶
Inform the operator how to handle the product.
▶
In particular, draw attention to the safety information
which the operator must follow.
▶
Inform the operator of the necessity to have the product
maintained on a regular basis.
▶
Instruct the operator about measures taken to ensure the
supply of combustion air and flue gas pipe.

10 Troubleshooting

10.1

Rectifying faults

▶
If fault messages (F.xx) appear, rectify 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 remedy the fault and the fault recurs
despite fault clearance attempts, contact customer ser-
vice.
21