Coltene SciCan BRAVO G4, Technical & Service Manual

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Sterilizers Bravo G4
- TECHNICAL MANUAL
20
FUNCTIONING EN
4.4. 1st PRESSURE RISE
In this phase the steam injection is activated in the chamber, bringing the pressure from the negative value reached
during vacuum pulse to 1.00 bar.
The pressure rise is divided into two parts; the first part from - 0.80 bar to 0.00 bar and the second part from 0.00 bar
to 1.00 bar.
In the first pressure rise phase, solenoid valve EV2 is activated to compensate for any air pockets that may form
inside the hydraulic circuit outside the chamber.
During the whole pressure rise phase, the chamber tube bundle heating element and the generator heating element
are activated to ensure that the correct temperature is kept inside the chamber and that steam is quickly generated.
1
st
PRESSURE RISE - component activation status
ST
AT
U
S
EV1
High drain
(N.O.)
EV2
Air inlet
(N.C.)
EV3
Low drain
(N.C.)
EV4
Drain
deflector
(3V)
EV5
Chamber
air inlet
(N.C.)
FAN
W
AT
ER
PU
MP
–
EV6
VA
CUUM
PU
MP
C
H
AMBER
T
U
BE
BUNDL
E H
EA
TI
NG
EL
EMEN
T
G
ENE
RA
TO
R
HE
AT
ING
EL
EMEN
T
Part 1
from
- 0.80 to
0.00
On
closed
On
open
Off
closed
On (1)
Off
closed
ON ON OFF ON ON
Part 2
from 0.00
to 1.00
On
closed
Off
closed
Off
closed
Off (2)
Off
closed
ON ON OFF ON ON
Once the 1 st PRESSURE RISE has been correctly carried out, the sterilization cycle performs two additional
VACUUM PHASES with a second PRESSURE RISE in between at 1.00 bar; during this two phases the same
negative pressure value required for the 1 st VACUUM PHASE is achieved.
134°C B Cycle - 4 mins.
(
ROW versions only)
132°C/270°F Hollow Wrapped Cycle - 4 mins.
(
US/CA versions only)