7.7. Cleaning the burner and the evacuation in the by-pass and changing
the seals
G20
G31
DORCHESTER
DR-SG XX-210
20 kW
AT QMIN: 9.4 % < CO2 < 9.8 %
AT QMAX: 8.6 % < CO2 < 9.0 %
at Qmin: 0.8 % < CO2 < 11.2 %
at Qmax: 10.4 % < CO2 < 10.8 %
25 kW
30 kW
DORCHESTER
DR-SG XX-356
35 kW
AT QMIN: 9.0 % < CO2 < 9.4 %
AT QMAX: 8.2 % < CO2 < 8.6 %
50 kW
60 kW
DORCHESTER
DR-SG XX-538
69.9 kW
AT QMIN: 9.2 % < CO2 < 9.6 %
AT QMAX: 8.4 % < CO2 < 8.8 %
80 kW
100 kW
120 kW
Joint
Manifold
Burner
seal
7.7.1. Cleaning the burner
Before beginning any type of burner zone
dismantling, it is essential that you obtain the after-
sales service kit for changing burner seals that
is suitable for your appliance. (kit AA555573 or
AA555574)
IMPORTANT: Any seal that is dismantled must be
replaced.
Refer to the instructions for the burner seal
kit(s) / burner pipe / complete burner etc. for
disassembling and reassembling the burner
elements for maintenance operations.
Page 48 / 104
00U07337760-A
DORCHESTER DR-SG -
Installation, Operation and Maintenance