Testing For Gas Leaks; Filling The Appliance - Buderus Logamax plus GB142-24 Installation And Servicing Instructions

9 Start-up procedure
9.1

Testing for gas leaks

Prior to start-up of the appliance 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 main-
tenance 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 60 inch W.C.
(150 mbar).
9.2

Filling the appliance

Set the main switch to "1".
the BC10 telling you that there is no system pressure.
Fill the heating system to a pressure of around 20 psi
(1.5 bar).
Observe the pressure on the BC10 or the P/T gauge
in the pump manifold for the heating circuit.
The fill pressure 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 pres-
sure 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 ho to
correct the situation. Do not plug the relief
valve.
For first time start up it is necessary to set the DHW
temperature knob and the heating water temperature
knob to the desired setting (see subsection 10.3.2 and
10.3.3). Factory setting is "0".
We reserve the right to make any changes due to technical modifications!
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