Siemens KION Service Manual page 175

KION / KION-i
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Siemens-Elema AB
• Connect gas supply (from the hospital central gas
supply) to all three gas inlets on the KION / KION-i
workstation.
• Check if there is a leakage through the one-way
valves (OV5–OV8) in all four yokes. Cover the gas
inlet channel in each yoke with a finger and check if
there is a pressure built-up under the finger.
Replace faulty one-way valves if necessary.
• Disconnect the gas supply.
• Connect gas cylinders to the backup gas supply
manifold and open the cylinder valves.
• Check if there is a leakage through the safety
valves (SV5–SV7). Cover both outlet holes on each
one of the safety valves with two fingers and check
if there is a pressure built-up under the fingers.
Replace faulty safety valves if necessary.
• Check for gas leakages (with gas cylinder valves
still open). Use leakage detection spray/liquid and
check the following connections:
– The connection between the safety valves and
the manifold (5).
– The connection between the yoke and the
manifold (6).
– The connection between the pressure regulators
and the manifold (7).
– The connection between the pressure transducer
and the manifold (8).
• Close the gas cylinder valves.
• If a gas leakage was detected, replace the O-ring/
gasket at the faulty unit and re-check.
A function check of the Backup gas supply manifold
will be performed as a part of section "Completing
the Twelve-months maintenance" below.
• With gas cylinder valves open, check for gas
leakages through the gas connections on the Gas
distribution block. Cover the gas inlet with a finger
and check if there is a pressure built-up under the
finger. If necessary, replace faulty one-way valves
(OV1–OV3) inside the Gas distribution block.
Maintenance
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