Placing the heating system in operation 11
29
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
Carrying out leak test
5. Open gas valve in the gas line.
6. Check the gas connection line to the gas valve for
leaks with soap solution. If no leaks are found,
continue with step
8. If any leaks are found, close
gas valve.
7. Seal leaks and repeat step 6.
8. Close main gas shut-off valve. Remove the screw
plug for the gas pressure measuring port on the gas
valve. Install pressure measuring nipple and attach
a pressure gauge to measure the gas pressure.
9. Remove the screw plug for the manifold pressure
measuring port on the gas valve. Install pressure
measuring nipple and attach a pressure gauge to
measure the manifold pressure.
10. Open gas valve and measure the gas pressure of
the boiler. The connection pressure for natural gas
must be between 7" and 10.5" W.C. and between
11" and 13" W.C. for propane gas. If the connection
pressure for natural gas is not between 7" and 10.5"
W.C. and not between 11" and 13" W.C. for propane
gas, contact the customer service technician or the
gas company. Close main gas valve.
11. Always follow the start-up instructions on the next
page.
USER NOTE
The boiler has two gas valve. Make all
measurements and adjustments on both
gas valves.
CAUTION!
SYSTEM DAMAGE
due to short-circuit.
z Cover the hazardous locations before
checking for leaks.
z Do not spray the leak solution on wiring
openings, plugs or electrical
connections. Do not allow the solution
to drip on these locations.
Fig. 24 Gas valve
1 ON/OFF button (at ON position)
2 Screw plug for gas pressure measuring port
3 Screw plug for manifold measuring port
1
2
3
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