Removing The Supply And Return Headers (Dual Fuel) - Viessmann Vitocrossal 300 CA3B Disassembly And Reassembly Instructions

Disassembly

Removing the Supply and Return Headers (Dual Fuel)

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Vitocrossal 300, CA3B Series 2.5 to 6.0 Technical Data
1. Remove the thermal insulation jacket from the supply
header.
2. To disassemble the supply header, disconnect the
flange bolts and lift off the supply header.
3. Disconnect the fl ange connections from the gas valves.
4. Disconnect gas valve brackets on the boiler section
and set aside.
5. Disconnect the burner gas piping from the gas
manifold and set aside.
6. Remove the gas manifold from the boiler section bracket.
7. Remove the bolts from the actuators and remove
the actuators and carefully set aside.
8. To disassemble the return header, remove the flange
bolts and lift off the return header.
9. Remove the isolation valves and set aside.