Potterton EC three 125, Инструкция по установке, эксплуатации и обслуживанию, Страница: 36 / 148

5.8 CO2 -Content
The CO
2
content in the exhaust gas must be checked during commissioning and
during regular maintenance of the boiler, as well as, after reconstruction work on
the boiler or on the exhaust gas system.
CO
2
-content during operation see section
Technical data.
Caution! Risk of damage of the burner!
Too high CO
2
-values can lead to unhygienic combustion (high CO-values) and
damage to the burner.
Too
low CO
2
-values can lead to ignition problems.
The CO
2
-value is set at the gas valve by adjusting the gas pressure (see Fig. 9 ).
In case of employment of the EuroCondense three in areas with fluctuating natu-
ral gas composition, the CO
2
-content should be adjusted in accordance with the
Wobbe Index at any given time (ask the gas supply company).
The CO
2
-content to be set can be decided as follows:
- CO
2
-content = 9,3 - (W
oN
- W
ocurrent
) * 0,5
The air quantity set in the factory must not be changed.
5.9 Changing over from LPG to
natural gas and vice versa
Danger ! Danger of life by gas!
The gas type of the EuroCondense three must only be modified by an approved
heating specialist.
To change to other type of gas only the CO
2
- content must be reset by adjusting
the jet pressure on the gas valve (see Fig. 9 ).
Moreover, the following parametres of the LMS control have to be adapted - see
the values of the following tables:
Function Prog. no. Setting level
EC three 125 EC three 170 EC three 215
Natu-
ral gas
LPG
Natu-
ral gas
LPG
Natu-
ral gas
LPG
Boiler
2331 E 20 35 28 35 35 48
Burner control
Required output prepurging 9504 E 59.3 66.3 75.5 86.8 77.1 89.3
Required output ignition 9512 E 59.3 66.3 75.5 86.8 77.1 89.3
Required output LF 9524 E 20.0 35.0 28.0 35.0 35.0 48.0
Fan output/speed slope 9626 E 37.1 33.9 27.6 24.1 26.4 23.0
Fan output/speed Y-section 9627 E 501.1 453.9 517.2 507.4 464.4 446.3
CO
2
content (± 0.2 %) 9.3 11.0 9.3 11.0 9.3 11.0
Function Prog. no. Setting level
EC three 260 EC three 320
Natural
gas
LPG
Natural
gas
LPG
Boiler
2331 E 42 58 48 58
Burner control
Required output prepurging 9504 E 97.7 110.3 103.9 115.5
Required output ignition 9512 E 97.7 110.3 103.9 115.5
Required output LF 9524 E 42.0 58.0 48.0 58.0
Installation
36 Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13