Testing For Gas Leaks; Filling The Boiler - Buderus logamax plus gb142-24 Installation Manual

9.1

Testing for gas leaks

Prior to start-up of the boiler you must check the external
tightness of the gas supply valve and confirm this in the
start-up report.
WARNING
– 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.
Disconnect the heating system from the power supply.
Check the exterior tightness of new conduit sections up
to and including the direct sealing point on the gas burner
fitting. The maximum test pressure allowed on the input
of the gas burner fitting is 14 inch W.C. (35 mbar).
9.2

Filling the boiler

Set the main switch to "1". P0.0 appears in the display of the
BC10 telling you that there is no system pressure.
Fill the heating system to a pressure of around 20 psi
(1.5 bar).
NOTICE
Observe the space heating water requirements
as described in paragraph 1.4 on page 6.
Observe the pressure on the BC10 or the P/T gauge in
the pump manifold for the heating circuit. The fill pres-
sure of the system should be at least the required inlet
pressure for the expansion tank plus 7.2 psi (0.5 bar).
The minimum pressure is 15 psi (1.0 bar) (on a cold
system). The maximum pressure is 44 psi (3.0 bar) (if the
heating medium temperature is at its highest possible
level). If this pressure is exceeded, the pressure relief
valve will open.
NOTICE
If a relief valve discharges periodically, this may
be due to thermal expansion in a closed water
supply system. Contact the water supplier or
local plumbing inspector on how to correct the
situation. Never plug the relief valve.
We reserve the right to make any changes due to technical modifications!
Installation instructions Logamax plus GB142-24/30/45/60 • version 10/2007
Start-up procedure
Buderus • http://www.buderus.net
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