Checking The Orifices; Inlet Gas Pressure - Buderus logamax plus gb142-24 Installation Manual

9.6

Checking the orifices

CAUTION
The burner must only be commissioned if the
correct orifices are fitted (see table 6).
Convert the burner fitting to another gas type
if required (see chapter 14 "Converting the
boiler to propane", page 52).
9.7

Inlet gas pressure

Open at least one thermostatic radiator valve if present
to allow water to flow through the boiler.
Do not switch on the boiler.
Close the gas shut-off valve. Loosen the screw plug on
the inlet gas pressure testing nipple by two turns (fig. 34,
pos. 1).
Connect the pressure gauge connection hose to the
testing nipple (fig. 34, pos. 2).
Slowly open the gas shut-off valve.
The boiler and its individual shutoff valve must be discon-
nected from the gas supply piping system during any pres-
sure testing of that system at test pressures in excess of
½ psi (3.5 kPa).
The boiler must be isolated from the gas supply piping
system by closing its individual manual shutoff valve during
any pressure testing of the gas supply piping system at test
pressures equal to or less than ½ psi (3.5 kPa).
Briefly press on the control panel cover to open it.
Switch on the heating system by setting the main switch
to position "1" (see chapter 10 "BC10 basic controller",
page 39).
Press the "Chimney Sweep"
approx. two seconds) until the display shows a decimal
point.
We reserve the right to make any changes due to technical modifications!
Installation instructions Logamax plus GB142-24/30/45/60 • version 10/2007
d
button and hold it (for
Start-up procedure
Boiler Type of gas
capacity supply
24 kW Natural gas
P
LPG
30 kW Natural gas
P
LPG
45 kW Natural gas
P
LPG
60 kW Natural gas
P
LPG
Table 6 Gas orifice diameter
Fig. 34 Measuring the inlet gas pressure
Fig. 35 Opening the control panel
9
Gas orifice diameter
in mm (inch)
4.45 (0.174)
3.35 (0.131)
4.45 (0.174)
3.35 (0.131)
5.40 (0.213)
4.05 (0.158)
7.50 (0.293)
5.40 (0.213)
Buderus • http://www.buderus.net
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