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Before completing commissioning, maintenance, conversion, and repair work, all
gas-conducting components – from the manual shut-off valve to the burner jet – must
be checked for leaks.
Particular attention must be paid to the measuring stubs on the gas valve. Checks must
be performed when the burner is both switched on and switched off.
Installing thermal shut-off equipment on site is recommended.
If gas-heated appliances are accessible to anyone, it is also necessary to check whether
a gas flow monitor needs to be used.
Gas supply
Required flow rate
Appliance type
PT 825x
PT 830x SL
PT 833x
PT 840x
PT 850x
PT 880x
Table 1
The connected load is based on the following consumption calorific values:
Natural gas LL (G 25): 29.25 MJ/m³ (Hi)
Natural gas E (G 20): 34.02 MJ/m³ (Hi)
Liquid gas (G 30): 45.65 MJ/kg (Hi)
Natural gas
Natural gas
9' 10" (3 m)
Internal
diameter
¾" (20 mm)
4.7 m³/h
1" (25 mm)
8.6 m³/h
1 ¼" (32 mm)
16.0 m³/h
1 ½" (40 mm)
26.5 m³/h
2" (50 mm)
60.0 m³/h
Table 2
Rated heat load (Hi)
15 kW
18 kW
21.5 kW
30 kW
36 kW
15" (5 m)
32' 9 11/16" (10 m)
3.7 m³/h
2.6 m³/h
6.9 m³/h
4.8 m³/h
12.4 m³/h
8.7 m³/h
20.5 m³/h
14.5 m³/h
47.0 m³/h
33.0 m³/h
Natural gas (LL)
Natural gas (E)
1.85 m³/h
2.22 m³/h
2.65 m³/h
3.69 m³/h
4.43 m³/h
Length of gas line
65' 7 3/8" (20 m)
98' 5 1/8" (30 m) 164' 1/2" (50 m) 328' 1" (100 m)
Maximum flow rate
1.6 m³/h
1.1 m³/h
3.1 m³/h
2.4 m³/h
6.2 m³/h
5.0 m³/h
10.3 m³/h
8.4 m³/h
23.0 m³/h
19.0 m³/h
Liquid gas
1.59 m³/h
1.18 kg/h
1.90 m³/h
1.42 kg/h
2.28 m³/h
1.70 kg/h
3.17 m³/h
2.37 kg/h
3.81 m³/h
2.84 kg/h
0.7 m³/h
1.9 m³/h
3.8 m³/h
6.5 m³/h
15.0 m³/h
Gas
0.3 m³/h
0.9 m³/h
2.4 m³/h
4.0 m³/h
10.0 m³/h
15
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