Setting The Pump Output; Setting The Bypass Valve; 11 Handing Over To The End User - Vaillant ecoTEC exclusive 627 Installation And Maintenance Instructions Manual

Number
Heat de-
of per-
mand
sons
3 ‑ 4
20.0 kW
4 ‑ 5
3 ‑ 4
25.0 kW
4 ‑ 6
3 ‑ 4
> 27.0 kW
4 ‑ 6
10.4

Setting the pump output

Navigate to Menu → Installer level → Diagnostics
1.
menu → D.014 Pump speed target value and confirm
by pressing .
2. Set the required pump output.
Condition: Low loss header installed
▶
Switch off the speed regulation and set the pump output
to a fixed value.
10.4.1 Remaining pump head
10.4.1.1 Pump curve for VU 256/5-7
A
400
350
300
250
200
53%
150
100
60%
50
0 200 400 600 800 1000
A Remaining feed head
[hPa (mbar)]
10.5

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 code D.014.
▶
Remove the front casing. (→ Page 16)
32
Guideline value for burner
operating hours until the
next inspection/maintenance
work is due for an average
operating time of one year
(dependent upon the system
type)
2600 h
2700 h
2800 h
2900 h
3000 h
3000 h
100%
80%
70%
1200 1400 1600 1800 B
B System volume flow [l/h]
Installation and maintenance instructions ecoTEC exclusive 0020193966_04
▶
Regulate the pressure using the adjusting screw (1).
Pres-
Position of the sure
adjusting screw in MPa
(mbar)
Right-hand stop
0.035
(turned all the
(350)
way down)
Mid-position
0.025
(5 turns to the
(250)
left)
5 further turns to
0.017
the left from the
(170)
mid-position
▶
Install the front casing.

11 Handing over to the end user

▶
At the time of commissioning complete all relevant sec-
tions of the Benchmark commissioning checklist, located
at the rear of this document.
▶
For IE: Complete a "Declaration of Conformity" to indicate
compliance to I.S. 813. An example of this is given in the
current edition of I.S. 813.
▶
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.
▶
Draw attention, to the current issue of the Gas Safety
(Installation and Use) Regulations, Section 35, which
imposes a duty of care on all persons who let out any
property containing a gas appliance in the UK.
▶
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 that
the end user must follow.
▶
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 supply of combustion air and flue gas guiding, and
instruct the operator that he must not make any changes.
1
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