32
Installation and maintenance instructions ecoTEC exclusive 0020193966_04
Heat de-
mand
Number
of per-
sons
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)
20.0 kW
3
‑
4
2600 h
4
‑
5
2700 h
25.0 kW
3
‑
4
2800 h
4
‑
6
2900 h
> 27.0 kW
3
‑
4
3000 h
4
‑
6
3000 h
10.4
Setting the pump output
1.
Navigate to
Menu
→
Installer level
→
Diagnostics
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
350
400
300
250
200
150
100
50
0
600
200 400
800 1000
1400 1600
1200
1800 B
A
100%
80%
70%
60%
53%
A
Remaining feed head
[hPa (mbar)]
B
System volume flow [l/h]
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. (
1
▶
Regulate the pressure using the adjusting screw
(1)
.
Position of the
adjusting screw
Pres-
sure
in MPa
(mbar)
Notes/application
Right-hand stop
(turned all the
way down)
0.035
(350)
If the radiators do not heat
up sufficiently at the default
setting. In this case, you
must set the pump to the
maximum speed.
Mid-position
(5 turns to the
left)
0.025
(250)
Default setting
5 further turns to
the left from the
mid-position
0.017
(170)
If noises are produced in
the radiators or radiator
valves
▶
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.
