Replacing A Solenoid Valve; Table 4-4 Svcm Specifications - Siemens Maxum II PD PA AP Service Manual

Valves
4.1 Solenoid Valves
Operation Test
1. Using a fine-pointed object, press Solenoid Valve red button.
2. When pressed, pressure is applied to the piston that moves to either the open or closed
position. Resulting pressure is then applied to the column or sample valve.
3. If piston does not operate when the button is pressed, check for correct gas pressure.
4. If piston does not operate and pressure is 75 psig, Solenoid Valve is defective and must
be replaced.
5. Repeat for each valve operating on and off. Allow at least 1 second between button presses.
Table 4-4 SVCM Specifications
Function
Switching Speed (Maximum response time on/off ms)
4-way
3-way non-latching
Operating Voltage
Pressure Range, 3-way
Pressure Range, 4-way
Vacuum Range
Ambient Temperature Range
Leakage
4.1.2

Replacing a Solenoid Valve

The solenoid valves are mounted on either the floor or back of the electronic enclosure,
depending on configuration. Valves are replaced individually. The Solenoid Valve
Replacement Kit is available as part number 2020149-001.
Voltage dangerous to life exists. Failure to follow proper procedures may result in equipment
damage, personal injury or death.
Before performing the removal and installation procedures, turn off primary AC power to the
Maxum II from the main circuit breaker. Observe all site safety requirements before
performing any repair or maintenance on the Maxum II.
Procedure
1. Back up and shut down the unit using the
Maxum Edition II Analyzer General Maintenance Manual (A5E42019842001) from the
Siemens web site
dtp=Manual&pnid=17741).
2. Open electronic enclosure door (using a 4mm (5/32") Allen wrench if necessary).
30
Specification
15 ms
15 ms
24 VDC
172 to 690 kPa (25 to 100 psig)
172 to 690 kPa (25 to 100 psi)
0 to -91.4 kPa (0 to 27" of Hg)
-18°C to 65°C (-0.4°F to 149°F) (dry air)
≤ 50 μl/min, air @ 70°F (21°C) with 345 kPa (50 psig) on the common port.
WARNING
(http://support.industry.siemens.com/cs/products?
General Analyzer Shutdown Procedure in the
Maxum II Valves and Oven Components
Service Manual, 10/2018, A5E42019844001