Testing For Gas Leaks - Buderus GB142-24 Instruction

3
LP conversion
B Place a new sticker underneath the existing rating plate
sticker indicating the type of gas supply installed. Fill
out the required information on the conversion label.
1.
Fig. 4
Installation of diffuser plate (GB142/60 model
only)
B Remove burner gasket (
B Remove gas-air distribution plate (
B If present, remove old diffuser plate (
B Allways install the new diffuser plate of the conversion
kit propane 60 kW.
B Reassemble new diffuser plate, gas-air distribution
plate and burner gasket.
B Secure the supplied LP conversion kit label to the
boiler next to its rating plate.
Fig. 5
6
2.
72150100-004.1TD
fig. 5, [1]).
fig. 5, [2]).
fig. 5, [3]).
1
2
3
4
72150100-005.1T
3.1

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.
DANGER:
B Cover unprotected boiler parts before
leak testing.
B Do not spray the leak testing agent onto
cables, plugs or electrical connection
lines. Do not allow it to drip onto them
either.
Boiler Type of gas
capacity supply
24 kW Natural gas
LPG P
30 kW Natural gas
LPG P
45 kW Natural gas
LPG P
60 kW Natural gas
LPG P
Table 4 Gas orifice diameter
DANGER:
Commissioning and maintenance activities
can cause leaks in pipe and screw
connections.
B Carry out a proper leak test.
B Only use approved leak detection agents
for leak detection.
B Disconnect the heating system from the power supply.
B 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).
B Check the input rates after converting the boiler to LPG
to the values on the front page.
Logamax plus GB142-24/30/45/60 – 7215 0100 (2011/11)
Gas orifice Venturi
diameter in mm article
(inch) number
4.45 (0.174) 423.072A
3.35 (0.131) 423.072A
4.45 (0.174) 423.072A
3.35 (0.131) 423.072A
5.40 (0.213) 423.170A
4.05 (0.158) 423.170A
7.50 (0.293) 423.173A
5.40 (0.213) 423.173A