Thoroughly Flushing The Heating Installation ("Hot"); Checking Leak-Tightness - Vaillant ecoTEC plus VU 446/5-5 (H-GB) Installation And Maintenance Instructions Manual

Validity: VU 606/5-5 (H-GB)
Condition: The CO₂ content must be adjusted
1
▶
Set the CO₂ content (value with front casing removed)
by turning the screw (1).
▶
Only carry out the adjustment in increments of 1/8 turn
and wait approximately 1 minute after each adjust-
ment until the value stabilises.
Note
Turn to the left: Higher CO₂ content
Turn to the right: Lower CO₂ content
7. Once the setting is finished, lock the check pro-
gramme.
8. If an adjustment is not possible in the specified adjust-
ment range, do not start up the product.
–
Inform Customer Service.
9. Install the front casing. (→ Page 18)
9.13.6 Gas conversion procedure
Note
The conversion procedure is described in the in-
structions that are included with the conversion
set that is supplied with the product.
▶
Follow the instructions in the manual for the conversion
set to carry out the gas conversion on the product.
9.14 Thoroughly flushing the heating installation
("hot")
Validity: Great Britain OR Ireland
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 and Purging the heating
installation.
7. Re-fill the system until the system design pressure of
0,1 MPa (1,0 bar) is attained.
0020261389_03 ecoTEC plus Installation and maintenance instructions
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 additional 1 bar reading on the pressure
gauge. The minimum pressure should not
be less than 0,1 MPa (1 bar) in any install-
ation. If the system is to be treated with an
inhibitor it should be applied at this stage in
accordance with the manufacturer's instruc-
tions
8. Install the front casing.
9.15

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.
9.15.1 Checking the heating mode
1. Ensure that there is a heating demand at the product.
2. Call up Live monitor.
Status codes – Overview (→ Page 58)
◁
If the product is working correctly, the display
shows S.04.
9.15.2 Checking the domestic hot water generation
Condition: Cylinder connected
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.
▶
Make sure that the cylinder thermostat is requesting heat.
1. Call up Live monitor.
Status codes – Overview (→ Page 58)
◁
If the cylinder charging is carried out correctly, S.24
appears in the display.
2. If you have connected a control to the installation and
you can set the domestic hot water temperature on this
control, set the domestic hot water temperature on the
boiler to the maximum possible temperature.
3. Adjust the target temperature for the connected do-
mestic hot water cylinder to the control.
◁
The boiler adopts the target temperature which is
set on the control.
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