5 Operation
5.2 Connecting the argon supply
Dentsply Sirona
Operating Instructions inLab Profire
22
67 15 887 D3770
D3770.201.01.02.02 05.2019
5.2
Connecting the argon supply
DANGER
Danger posed by discharging gas!
Possible risk of fire and explosion as well as a risk of suffocation.
➢ When conducting any work on the furnace, the argon and voltage
supply must be disconnected and the gas canister must be
closed.
➢ When handling argon, observe the national safety regulations
(e.g. in Germany: TRGS526, section 5.2.11 "Pressurized gas
canisters and valves").
The sintering of non-noble metal (inCoris CCB) requires an oxygen
reduced atmosphere. This is achieved using argon. Argon is a noble
gas in a compressed gas cylinder.
The purity of the argon must be 4.6 = 99.996 vol. %.
● Provide your cylinder with a manometer as well as a pressure
regulator.
The argon flow is set by default in the factory and is approx. 1l/ minute.
1.
Connect the connecting hose included in the scope of supply with
the inLab Profire high-temperature furnace (including metal) to the
argon port of the furnace and the argon supply (gas canister).
2.
Set the output pressure of the gas canister to 7+/-1 bar (optimum
pressure).
The maximum permitted pressure is 10 bar.
IMPORTANT
If the output pressure of the gas canister is set higher or lower than
7+/-1 bar, too little or too much argon will enter the sintering tray and
the sintering process will fail!
3.
Check the gas pipes and connected couplings for leaks and secure
fitting.
IMPORTANT
The volume of one argon canister will be enough to flood an entire
room if there is a malfunction. Ventilation in the floor area is
recommended, because argon is heavier than air and settles on the
floor.
4.
Protect ducts and shafts against the ingress of gas.
5.3
Initial startup
1.
Connect the connection cable for the power supply to the mains.
2.
Switch the furnace on at the main switch.
Ä
The unit door opens.
Ä
The unit performs a self-test and closes the door again after the
self-test.
