Vaillant ecoTEC exclusive 843 Installation And Maintenance Instructions Manual page 22

7 Start-up
14. Tighten the screw on the measuring nipple (1).
15. Open the gas isolator cock.
16. Check the measuring nipple for gas tightness.
Conditions: Gas flow pressure not in the permissible range
Caution.
Risk of material damage and operating
faults caused by incorrect gas connec-
tion pressure.
If the gas connection pressure lies outside
the permissible range, this can cause oper-
ating faults in and damage to the product.
▶
Do not make any adjustments to the
product.
▶
Do not start up the product.
▶
If you cannot correct the failure, notify the gas supply
company and proceed as follows:
▶
End the check programme P.01.
▶
Allow the boiler to cool down by allowing pump overrun
to operate for a minimum of two minutes.
▶
Close the gas isolator cock.
▶
Remove the pressure gauge and retighten the sealing
screw (1) for the measuring nipple.
▶
Open the gas isolator cock.
▶
Check the measuring nipple for gas tightness.
▶
Close the gas isolator cock.
▶
Install the front casing.
▶
Disconnect the product from the power mains.
▶
You must not start up the boiler.
Conditions: Gas flow pressure in the permissible range
▶
End the check programme P.01.
▶
Allow the boiler to cool down allowing pump overrun to
operate for a minimum of two minutes.
▶
Close the gas isolator cock.
▶
Remove the pressure gauge and retighten the sealing
screw (1) for the measuring nipple.
▶
Open the gas isolator cock.
▶
Check the measuring nipple for gas tightness.
▶
Install the front casing.
▶
Reset boiler controls for normal operation.
▶
Record the appliance gas inlet working pressure (kPa
resp. mbar) in the Benchmark gas boiler commissioning
checklist.
7.14.4 Calibrating the heat generator and
measuring the CO/CO₂ content and gas
flow in heating mode
Caution.
Risk of operating faults caused by the
corruption of the measured values during
the calibration.
Operating the product with the front casing
open or not completely installed, or with the
flue pipe open, may negatively influence the
calibration of the gas-air mixture.
22
▶
During the calibration and when measur-
ing the CO₂ content, you must operate the
product with the front casing installed and
closed, and with the flue pipe completely
installed.
1. Start up the product.
Note
Since the combustion can be continuously
monitored by the product, you do not need to
check the combustion.
2. Ensure that the maximum heat volume can be trans-
ferred to the heating installation by opening the radiator
thermostats.
Note
All radiators should be cold before you
start calibration. This ensures that the heat
volume can be transferred to the heating
installation.
Note
If there is an excessive air temperature at the
radiators, calibration may not be possible.
3. Start check programme P.01.
◁
The heat generator starts in heating mode.
◁
The heat generator first switches between status
S.01 and status S.02.
◁
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).
Conditions: The flow temperature increases to above 80 °C in the next
five to six minutes.
▶
The heat generator does not switch to status S.04.
Note
Calibration is not complete and the CO/CO₂
content and gas flow cannot be measured.
▶
Use to end check programme P.01.
4. Alternatives 1 / 2
▶
If required, carry out calibration and measurement
again.
Alternatives 2 / 2
4.
▶
Calibrate the heat generator and measure the
CO/CO₂ content and the gas flow in domestic hot
water mode. (→ Page 23)
Conditions: The flow temperature remains below 80 °C in the next five to
six minutes.
▶
If the heat generator switches from status S.93 to status
S.04 after approximately five to six minutes, calibration
at maximum heat input is complete.
Installation and maintenance instructions ecoTEC exclusive 0020193968_03