Checking Leak-Tightness; Thoroughly Flushing The Heating Installation ("Hot") - Vaillant ecoTEC exclusive 843 Installation And Maintenance Instructions Manual

▶
In the next few minutes, measure the CO/CO₂ content
and the gas flow at maximum load.
▶
Use to end check programme P.01.
▶
Start check programme P.02.
◁
The heat generator starts in heating mode.
◁
The heat generator switches to status S.93 after
approximately two minutes for calibration.
◁
Do not measure the CO/CO₂ content or the gas flow
during calibration (status S.93).
◁
If the heat generator permanently switches from
status S.93 to status S.04 after approximately five
to six minutes, calibration at minimum load is com-
plete.
▶
In the next few minutes, measure the CO/CO₂ content
and the gas flow at minimum load.
▶
Use to end check programme P.02.
◁
Calibration and measurement in heating mode are
complete.
7.14.4.1 Calibrating the heat generator and
measuring the CO/CO₂ content and gas
flow in domestic hot water mode
1. The following steps are only required if calibration and
measurement in heating mode (→ Page 22) could not
be completed successfully.
2. If required, open all of the draw-off points.
3. Set the domestic hot water temperature at the heat gen-
erator to the maximum.
Danger!
Risk of burns and scalding!
There is a risk of scalding at the domestic hot
water draw-off points if the water temperature
is set to the maximum.
▶
Avoid contact with the water that escapes
from the domestic hot water draw-off
point.
4. Open check programme P.01.
◁
The heat generator starts in domestic hot water
mode.
◁
The heat generator first switches between status
S.11 and status S.13.
◁
The heat generator switches to status S.93 after
approximately two minutes for calibration.
◁
Do not measure the CO/CO₂ content or the gas flow
during calibration (status S.93).
5. If the heat generator switches from status S.93 to status
S.14 after approximately five to six minutes, calibration
at maximum heat input is complete.
6. In the next few minutes, measure the CO/CO₂ content
and the gas flow at maximum load.
7.
Use to end check programme P.01.
8. Open check programme P.02.
◁
If the heat generator permanently switches from
status S.93 to status S.14 after five to six minutes,
calibration at minimum load is complete.
0020193968_03 ecoTEC exclusive Installation and maintenance instructions
9. In the next few minutes, measure the CO/CO₂ content
and the gas flow at minimum heat input.
10. Use
to end check programme P.02.
◁
Measurement and calibration in domestic hot water
mode are complete.
7.15

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.
Conditions: Room-sealed operation
▶
Check whether the vacuum chamber has been closed
tightly.
7.15.1 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.
7.15.2 Checking the hot water generation
1. Open a hot water valve all the way.
2. Call up the Live Monitor.
◁
If hot water generation is working correctly, the
display shows S.24.
7.16 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 19) and Purging
the heating installation (→ Page 20).
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. Further
information can be obtained from Sentinel,
Betz Dearborn Ltd., Tel: 0151 420 9595, or
Fernox, Alpha– Fry technologies. Tel: 0870
8700362.
Start-up 7
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