6 Start-up
14
Installation and maintenance instructions atmoMAG 0020189893_03
1
▶
Clear any faults from the product by opening the hot wa-
ter valve again and switch the product on and off again
by pressing the main switch
(1)
a second time.
▶
If the fault clearance does not work or the product is re-
peatedly blocked by a safety device, check the product or
contact Vaillant Customer Service.
▶
In this case, shut down the product.
6.4
Checking the gas flow pressure
Applicability:
Germany
OR Austria
OR Switzerland
1
▶
Close the gas isolator cock.
▶
Unscrew the sealing screw
(1)
from the measuring nipple
on the gas valve.
▶
Remove the seal.
▶
Connect a pressure gauge to the measuring nipple on
the gas valve.
▶
Open the gas isolator cock.
▶
Start up the product in accordance with the operating
instructions and draw off hot water.
▶
Measure the gas flow pressure.
Applicability:
Germany, Austria, Switzerland
Gas family
Permissible gas flow pres-
sure
Natural gas
G20 (DE, AT, CH)
G25 (DE)
1.7-2.5 kPa (17-25 mbar)
1.7-2.5 kPa (17-25 mbar)
Liquid gas
G31 (DE, AT, CH)
4.25-5.75 kPa (42.5-
57.5 mbar)
Conditions
: Gas flow pressure not in the permissible range
Danger!
Risk of material damage and operating
faults caused by incorrect gas flow pres-
sure.
If the gas flow pressure lies outside the per-
missible range, this can cause operating
faults in and damage to the product.
▶
Do not make any adjustments to the
product.
▶
Check the gas installation.
▶
Do not start up the product.
▶
If you are unable to remedy the fault, contact the gas
supply company.
▶
Close the gas isolator cock.
▶
Remove the pressure gauge.
▶
Position the seal on the sealing screw.
▶
Screw the sealing screw
(1)
into the measuring nipple on
the gas valve again.
▶
Open the gas isolator cock.
▶
Check the measuring nipple for gas tightness.
6.5
Checking the heat input
▶
Check the heat input either by reading off the gas flow
values at the counter (volumetric method) or by checking
the burner pressure (burner working pressure test).