Service Handbook OGB/OGS
AS/11-2011 / Item 7016560 6_22e_Removing and replacing the Convection heat exchanger_b.doc
Page 3 / 3
4. Put the unit into operation
After removing and replacing the heat exchanger, check the gas exhaust
values (CO less than 1000 ppm, CO
2
8% to 11% depending on gas type).
Check all connections when the burner is running for tightness (Gas detector
or leak spray): now you can check the connections on the blower 4 and
burner insert 6!
1 = Firing automatic
2 = Firing automatic cover
3 = Gas valve
4 = Burner blower
5 = Blower flange screws
6 = Burner insert
7 = Nuts on burner insert flange
8 = Nuts on gas exhaust pipe flange
9 = Gas exhaust pipe
10 = Restriction flange
11 = Heat exchanger
12 = Holder for heat exchanger
13 = Restriction flange seals (2x)
14 = Gas exhaust seals (2x)
15 = Heat exchanger seals (2x)
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