BUCHI DuMaster D-480 - Manual (Page 209)

Operation Manual D-480 ©BÜCH Labortechnik AG
8 - Maintaining the instrument 209
Installing the Ni flap
Note
The following section is a continuation of "Removing the Ni flap". All steps described in "Removing the
Ni flap" must already have been performed. See: Removing and cleaning the Ni flap (on page 206).
Process
The section is divided into the following phases:
 Preparing the instrument, gas pressure
 Installing the Ni flap
 Follow-up instrument preparation, gas pressure / gas-tightness
Safety instruction
Strictly observe the safety instruction "Hot instrument parts" under Warning notes during operation
(on page 24).
Phase 1: Preparing the instrument, gas pressure
Safety instruction
Strictly observe the safety instruction "Gas pressure" under Warning notes during operation (on
page 24).
To prepare the instrument for maintenance work follow the instructions in "Preparing the instrument:
Cool down the furnace, gas pressure" in Preparing and following up maintenance work (on page
171).
Top view furnace
The following picture shows a top view of the furnace pulled out:
Legend:
1 Post combustion tube plug
2 Post combustion tube
3 Combustion tube connection
4 Combustion tube
5 Reduction tube plug
6 Reduction tube
Phase 2: Installing the Ni flap
Proceed as follows:
 Place the combustion tube connection (3) onto the combustion tube (4). The lance must extend
into the ash crucible approx. 5 - 10 mm.