Thoroughly Flushing The Heating Installation ("Hot"); Checking Leak-Tightness - Vaillant ecoTEC plus Installation And Maintenance Instructions Manual

–
Higher CO₂ content: Turn anti-clockwise
–
Lower CO₂ content: Turn clockwise
▶
For natural gas only: Only perform the adjustment in in-
crements of 1 turn and wait approx. 1 minute after each
adjustment until the value stabilises.
▶
For liquefied petroleum gas only: Only perform the ad-
justment in small increments (approx. 1/2 turn), and wait
approx. 1 minute after each adjustment until the value
stabilises.
▶
Check the CO₂ content again.
▶
If necessary, repeat the setting process.
▶
Press (Cancel) once the adjustments have been
made.
▶
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.
▶
Screw the covering cap back in.
▶
Install the front casing.
9.16 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 31) and Purging
the heating installation (→ Page 31).
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.
34
9.17

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.
9.17.1 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.
9.17.2 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.
9.17.3 Checking the cylinder charging
Note
Cylinder charging is deactivated ex-works and
must be activated during initial start-up.
The cylinder charging of the shift-load cylinder is only active
if Comfort mode is switched on. If Comfort mode is activated,
the symbol "C" appears in the display ( Operating instruc-
tions).
When cylinder charging is switched on, the following temper-
atures can be set for the hot water temperature (see operat-
ing instructions):
–
Minimum temperature 50 °C
Maximum temperature 65 °C
When cylinder charging is switched off, the following temper-
atures can be set for the hot water temperature:
–
Minimum temperature 35 °C
Maximum temperature 65 °C
If cylinder charging is switched off, the cylinder is not held
at temperature. If you draw off water, the boiler switches on
and, in this case, only operates on the through-flow principle.
▶
The product is equipped with an automatic Anti-legionella
function; if the temperature in the domestic hot water
cylinder falls below 50 °C, the cylinder is heated up to
70 °C once every 24 hours. If required, in consultation
with the operator, switch the Anti-legionella function off
using diagnostics code D.074.
Overview of diagnostics codes (→ Page 51)
▶
Call up the Live Monitor.
– Menu → Live Monitor
◁
If the hot water generation is working correctly, S.24
appears in the display.
Installation and maintenance instructions ecoTEC plus 0020244998_04