Siemens KION Service Manual page 24

Description of functions
Pneumatic section
5. Gas distribution block
Gas supply from hospital central gas supply and/or
from gas cylinders are connected to this block.
The main functions are:
• Three gas inlets to connect gas from the hospital
central gas supply.
• PC 1720 W P
ALL RESSURE
measures the hospital central gas supply
pressures.
• The breathing gas and drive gas delivered to the
KION workstation sub-units are electronically and
pneumatically controlled by the G
3
V .
ALVES
• The two preset pressure regulators mounted on
the G D
AS ISTRIBUTION
the gases delivered to the patient cassettes
mushroom valves and to the block I
S .
UPPLY
• A number of gas inlets and outlets for connection
of the optional B
ACKUP
A O S
UXILIARY UPPLY
2
KION Workstation.
Gas inlets and outlet
The gas inlets are three couplings used to connect
gas from the hospital central gas supply.
The design of the gas inlet nipples and the color
marking varies according to different national
standards.
The gas inlet channels (inside the gas distribution
block) are equipped with gas inlet filters and spring
loaded one-way valves, OV1 – OV3. The gas inlet
filters and the one-way valves must be replaced
during the "Twelve months maintenance".
The O outlet is one coupling used to connect
2
optional equipment that requires O
The design of the gas outlet nipple and the color
marking varies according to different national
standards.
PC 1720 Wall Pressure
There are two main functions on PC 1720 W
P :
RESSURE
• Three pressure transducers including amplifiers.
Measures the pressure in the gases connected to
the gas inlets (from the hospital central gas supply).
There are no tube connections to the transducers,
the PC board is mounted firmly onto gas outlets in
the G D
AS ISTRIBUTION
equipped with seals to prevent leakage between
the G D
AS ISTRIBUTION
• Valve driver. A drive stage for the gas selection
valves EMV6 and EMV7.
3 - 6
mounted on the block
S
AS ELECTION
B regulates the pressure in
LOCK
O
NSTANT
G S M ,
AS UPPLY ANIFOLD
and S E to the
UCTION QUIPMENT
supply.
2
ALL
B . The gas outlets are
LOCK
B and the PC board.
LOCK
Gas selection valves
The different gases delivered to the G
controlled as follows in the G
• Gas going to G
Controlled by the solenoid valve EMV6. AIR or N
breathing gas depending on settings on the control
panel. Cuts automatically the N
supply pressure drops below 220 kPa (2.2 bar).
Opens automatically the N
pressure above 240 kPa (2.4 bar).
• Gas going to G
The O breathing gas is delivered directly to the
2
G M O
AS ODULE
solenoid valve on the G
• Gas going to G
Controlled by the solenoid valve EMV7. Supplies
normally AIR but changes automatically to O
AIR supply pressure drops below 200 kPa (2.0 bar)
2
or if the solenoid valve drive voltage fails.
Pressure regulators
There are two preset pressure regulators mounted
on the G D
AS ISTRIBUTION
• REG1 regulates the pressure in the mushroom
valve control gas supply (AIR or O
EMV7 mode) used by EMV1 – 5. The preset
pressure is 20 kPa ( 0.2 bar). For adjustment of
REG1, refer to the tool "Pressure Tester 0.2 bar
Regulator.
• REG2 regulates the pressure of the breathing gas
(O ) to the block I
2
pressure is 320 kPa ( 3.2 bar).
Backup gas inlets
The G D
AS ISTRIBUTION
backup gas inlets used when gases from the optional
B G S
ACKUP AS UPPLY
inlets are plugged if not used.
Gas outlets for auxiliary equipment
There are two extra gas outlets on the G
D B
ISTRIBUTION LOCK
outlets can be used to supply optional equipment,
such as A
UXILIARY
with O and AIR.
2
Siemens-Elema AB
M
AS
D
AS ISTRIBUTION
M AIR (N O) – BP:
AS ODULE
2
O supply if O
2
O supply at O
2
M O – BP: Only O
AS ODULE
2
– BP and is not controlled by any
2
D B
AS ISTRIBUTION
M D G AIR (O
AS ODULE RIVE AS
B :
LOCK
depending on
2
O S . The preset
NSTANT UPPLY
2
B is equipped with three
LOCK
M are connected. These
ANIFOLD
AS
, one for O and one for AIR. These
2
O S and S E
UPPLY UCTION
2
E382 E392E 061 01 02 02
KION / KION-i
are
ODULES
B :
LOCK
O
2
2
supply
2
.
2
.
LOCK
):
2
if the
2
,
QUIPMENT