Inspection and maintenance
41
Condens 7000 F – 6720871560 (2019/11)
11.11 Replacing components
NOTICE:
Malfunctions due to incorrectly connected or unconnected hose
lines!
If the wrong hose lines are used or if they are incorrectly connected, this
leads to unhygienic combustion.
Connect the hose lines as shown in the connection diagram
(Chapterl 17.4.3, page 61).
Make sure the hose lines are not buckled or trapped.
11.11.1 Removing the air/gas ratio control valve
Observe replacement interval of the air/gas ratio control valve.
Replace air/gas ratio control valve depending on the service life
according to tab. 14, page 42.
Shut down the heating system ( Chapter 9.1, page 30).
Close the main gas shut-off valve or gas isolator and secure against
unintentional re-opening.
Remove the front panel ( Chapter 11.1, page 31).
Undo the hose clip and pull off the compensation test cable [1]
at the valve.
Remove the plugs of the solenoid valves at the air/gas ratio control
valve and valve testing system [4].
Undo the union nut on the gas supply pipe [2].
Undo the 4 screws [5] on the flanges [3] of the air/gas ratio control
valve at the top and bottom.
Remove the air/gas ratio control valve.
Fig. 57 Undo the air/gas ratio control valve connections
(150 ... 300 kW)
[1] Compensation test cable
[2] Gas supply pipe union nut
[3] Flange
[4] Plug for solenoid valves
[5] Screws (4 x) top and bottom
[6] Test cable for gas outlet pressure
Fig. 58 Undo the air/gas ratio control valve connections
(75 ... 100 kW)
[1] Compensation test cable
[2] Gas supply pipe union nut
[3] Flange
[4] Plug for solenoid valve
[5] Screws (4 x) top and bottom
[6] Test cable for gas outlet pressure
11.11.2 Removing the fan
Shut down the heating system (Chapter 9.1, page 30).
Close the main gas shut-off valve or gas isolator and secure against
unintentional re-opening.
Remove the front panel (Chapter 11.1, page 31).
Detach the electrical connections at the fan (Fig. 59 or fig. 60).
Disconnect the plug-in connector (Fig. 59)
With room sealed operation:
Release the hinged pipe clip on the supply air hose
(Fig. 42, pipe 36).
Pull off supply air hose together with the connector from the
ventilation air collector (Fig. 42, page 36).
Fig. 59 Electrical connections, removing the fan
(boiler rating 75-100 kW)
[1] Hexagon nuts (4x) on the mixture manifold
[2] Electrical connections on the fan, boiler rating 75-100 kW
[3] Union nut on venturi, boiler rating 75-100 kW
[4] Plug-in connector, boiler rating 75-300 kW
0010012557-001
5
5
4
4
3
6
1
2
To Next Page
Loading...
