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9
Start-up procedure
9.1
Check for gas leaks
Prior to the initial start-up check that the gas flow pipework
is gas-tight; this must be confirmed in the start-up report.
WARNING
The boiler and its manual gas shutoff valve
must be isolated from the gas supply piping
system during any pressure testing of that
system, exceeding 0.5 psi (34.5 mbar).
The maximum test pressure allowed at the
manual gas shutoff valve inlet is 0.5 psi
(34.5 mbar).
Cover endangered positions before leak
testing.
Do not spray the leak testing agent onto
cables, plugs or electrical connection lines.
Do not allow it to drip onto them either.
DANGER
Leaks may be caused to pipes and screw
connections during commissioning and mainte-
nance activities.
Carry out a proper leak test.
Only use approved leak detection agents for
leak detection.
If 0.5 psi (34.45 mbar) or less, slowly open the gas valve
by pushing on the gas valve and turning it ¼ rotation in a
counter-clockwise direction (fig. 45). The gas valve is
open when it is in the vertical position.
Shut off the heating system from the power supply.
Check the new conduit section up to and including its
connection (i.e. direct sealing location) to the gas fitting
for leaks, using a foaming product.
The maximum test pressure allowed at the manual gas
shutoff valve inlet is 0.5 mbar (0.2 inch W.C.).
46
Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
1
2
Fig. 45 Open the gas valve
pos. 1:
pressure relief valve
pos. 2:
supply water valve
pos. 3:
pump
pos. 4:
manual gas shutoff valve
pos. 5:
return water valve
3
4
5
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