Buderus Logano G234X Installation And Maintenance Instructions Manual page 28

6
Commissioning the heating system
Carrying out leak test
5. Open the gas shut-off valve.
NOTICE: Risk of system damage due to
short-circuits!
B Cover any hazardous locations prior to
locating the leaks.
B Do not spray leak detector onto conduits,
plugs or electrical connection cables or
allow it to drip onto them.
6. Check the gas supply line to the gas valve for leaks with
soap solution. If no leaks are found, continue with step
8.
7. If leaks are detected, shut off the gas shut-off valve,
seal the leaks, and repeat step 6.
8. Close the gas shut-off valve. Remove the screw plug
for the gas supply port [2] on the gas valve in order to
measure the gas supply pressure. Install pressure
measuring nipple and attach a pressure gauge.
9. Remove the screw plug for the gas supply port [3] on
the gas valve in order to measure the nozzle pressure.
Install pressure measuring nipple and attach a pressure
gauge.
Fig. 29 Gas valve
1 ON/OFF button (at ON position)
2 Screw plug for gas connection pressure test port
3 Screw plug for nozzle pressure test port
28
10. Open gas shut-off and measure the supply pressure
of the boiler. The connection pressure for natural gas
must be between 7 and 10.5 inches W.C. (17.4 to
26.2 mbar) and between 11 and 13 inches W.C. for
propane gas (27.4 to 32.4 mbar). If the connection
pressure is not in this range with natural gas, contact
your customer service technician or gas utility
company. Close the gas shut-off valve.
11. Always follow the start-up instructions on the next
page.
Logano G234X - Technical specifications are subject to change without prior notice.