Lpg Conversion; Purging The Gas Line - Bosch Condens 7000 F Installation And Maintenance Instructions For The Contractor

Commissioning
Gas type
Nominal value of upper Wobbe index W
In limit gas range according to EN437 of upper Wobbe
index Ws at 1013 mbar
Required gas flow restrictor identification according to
boiler rating
1) Natural gas group H in accordance with DVGW Code of Practice G 260 falls within natural gas group E in accordance with DIN EN 437
2) E and E are sub-groups of gas group E
s i
3) Natural gas group L in accordance with DVGW Code of Practice G 260 falls within natural gas group LL in accordance with DIN EN 437
4) According to part number
Table 8 Gas characteristics and required gas flow restrictors
7.5.2

LPG conversion

With boiler size 75 kW and 100 kW:
When operating these two sizes with LPG, an additional pressure
regulator must be installed in the gas inlet.
The "LPG" conversion set contains the pressure regulator and
adjustment instructions.
For boiler sizes 150 kW to 300 kW:
When operating these two sizes with LPG, the cleaning cover of the
condensation catch pan must be replaced (Chapter 11.8.2, page 38).
To ensure quiet burner operation, the cover is equipped with a damping
component.
The "LPG" conversion set contains the cover and gas flow restrictor as
well as the adjustment instructions.
An additional pressure regulator is not required with these sizes.
▶ Perform all work as described in Chapter 7.5.1 for all sizes
(conversion to a different gas type by replacing the installed
gas flow restrictor).
Gas type
Nominal value of upper Wobbe
index W at 1013 mbar
s
In limit gas range according to
EN437 of upper Wobbe index
Ws at 1013 mbar
Required gas flow restrictor
identification according to
boiler rating
Table 9 Gas characteristics and required gas flow restrictors (LPG)
26
at 1013 mbar 0 °C
s
15 °C
0 °C
15 °C
75 kW Ø 8.70
100 kW Ø 8.70
150 kW Ø 12.30
200 kW Ø 14.40
250 kW Ø 16.30
300 kW Ø 17.30
P (Propane)
following gas type
conversion
0 °C 22.5 kWh/ m³
15 °C 21.3 kWh/ m³
0 °C 21.4 - 22.5 kWh/ m³
15 °C 20.2 - 21.3 kWh/ m³
75 kW Ø 6.80
100 kW Ø 6.80
150 kW Ø 8.50
200 kW Ø 10.30
250 kW Ø 11.30
300 kW Ø 12.10
1) 2) 3)
H , E, E LL, L
s
4)
as delivered following gas type
conversion
14.9 kWh/ m³ 12.2 kWh/ m³
14.1 kWh/ m³ 11.5 kWh/ m³
12.0 - 16.1 kWh/ m³ 10.0 - 13.1 kWh/ m³
11.4 - 15.2 kWh/ m³ 9.5 - 12.4 kWh/ m³
Ø 9.90
Ø 9.90
Ø 21.00
Ø 19.00
Ø 25.60
Ø 26.00
7.6

Purging the gas line

▶ Release the locking screw of the test nipple for gas supply pressure
and purge by turning it through two revolutions and attach the hose.
▶ Slowly open the gas isolator.
▶ Flare off escaping gas via an approved method. Remove the hose
when no more air is expelled, and tighten the locking screw.
▶ Close gas isolator.
Fig. 28 Purging the gas line
[1] Test nipple for measuring the gas supply pressure and for purging
2)
, E K
i
following gas type
conversion
12.5 kWh/ m³
11.9 kWh/ m³
11.0 - 13.4 kWh/ m³
10.5 - 12.7 kWh/ m³
Ø 9.80
Ø 9.80
Ø 20.00
Ø 18.00
Ø 25.40
Ø 25.20
1
Condens 7000 F – 6720871560 (2019/11)
0010012478-001