Vaillant VUW 246/5-3 (H-GB), Installation And Maintenance Instructions Manual

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0020244995_04 ecoTEC pro Installation and maintenance instructions
31
Condition : The CO
₂
content must be adjusted
2
1
▶
Remove the yellow sticker.
▶
Remove the covering cap (1) .
▶
Set the CO
₂
content (value with front casing removed)
by turning the screw (2) .
–
Higher CO
₂
content: Turn anti-clockwise
–
Lower CO
₂
content: Turn clockwise
▶
For natural gas only: Only perform the adjustment
in small increments of a 1/8 turn and wait approx.
one minute after each adjustment until the value
stabilises.
▶
For liquid gas only: Only perform the adjustment in ex-
tremely small increments (approx. 1/16 turn), and wait
approx. one minute after each adjustment until the value
stabilises.
▶
After you have implemented the settings, press ( ).
▶
If an adjustment is not possible in the specified adjust-
ment range, you must not start up the product.
▶
If this is the case, inform Customer Service.
▶
Refit the covering cap.
▶
Install the front casing.
9.12 Thoroughly flushing the heating installation
("hot")
1. Operate the appliance until the boiler and the heating
system are up to temperature.
2. Check the heating system for leaks.
3. Connect a hose to the drain valve located at the lowest
position of the heating system.
4. Shut off the boiler, open the drain valve and all purge
valves on the radiators and allow the water to flow out
of the heating system and the boiler quickly and fully.
5. Close the drain valve.
6. Fill the heating system again with water as described in
Filling the heating installation (
→
Page 28) and Purging
the heating installation (
→
Page 29).
7. Re-fill the system until the system design pressure of
0,1 MPa (1,0 bar) is attained.
Note
The actual reading on the digital pressure
gauge should ideally be 0,05 MPa (0,5 bar)
plus an additional pressure corresponding
to the highest point of the system above the
base of the boiler
–
10 m head equals an ad-
ditional 1 bar reading on the pressure gauge.
The minimum pressure should not be less
than 0,1 MPa (1 bar) in any installation. If
the system is to be treated with an inhibitor it
should be applied at this stage in accordance
with the manufacturer’s instructions.
8. Install the front casing.
9.13 Checking leak-tightness
▶
Check the gas pipe, the heating circuit and the hot water
circuit for leak-tightness.
▶
Check that the air/flue pipe has been installed correctly.
Condition : Room-sealed operation
▶
Check whether the vacuum chamber has been closed
tightly.
9.13.1 Checking the heating mode
1. Make sure that there is a heat requirement.
2. Call up Live monitor .
◁
If the product is working correctly, the display shows
S.04 .
9.13.2 Checking the hot water generation
1. Open a hot water valve all the way.
2. Call up Live monitor .
◁
If the hot water generation is working correctly, S.14
appears in the display.
10 Adapting the unit to the heating
installation
10.1 Calling up diagnostics codes
You can find the setting options in the diagnostics codes in
the installer level.
Overview of diagnostics codes (
→
Page 41)
▶
Call up the installer level. (
→
Page 26)
10.2 Burner anti-cycling time
To prevent frequent switching on and off of the burner and
thus prevent energy losses, an electronic restart lockout
is activated for a specific period each time the burner is
switched off. The burner anti-cycling time is only active
for the heating mode. Hot water handling during a burner
anti-cycling time does not affect the time function element
(default setting: 20 mins).