Siemens Maxum II Manual page 61

Note
The remainder of the startup process is dependent on whether an APU is installed.
(If APU is not equipped)
9.
10.
11.
(If APU is equipped)
12.
13.
14.
15.
Note
If the fast purge process does not complete correctly ending in the Purge LED light remaining
on, then turn off power and repair any leaks that may exist.
(For all systems)
16.
Note
(For systems without APU) If there is ever a loss of purge, the Purge alarm LED on the display
will light. This can be tested as described in section 2-4 of this manual.
(For systems with an APU) If there is ever a loss of purge, the APU will turn off power to the
analyzer. This can be tested as described in section 2-4 of this manual.
Explosion Protection Safety Standards
Manual, August 2017, A5E02220442001 Rev 8
Turn on the fast purge switch (figure 2-4) and allow fast purge air to flow for at least
8 minutes. Flow of fast purge air can be verified because of the louder sound of the
air flow. The fast purge relief valve opens slightly and the air can be heard as it leaves
the enclosure.
Turn off the fast purge switch. Flow of normal purge air should continue.
Turn on electrical power to the system.
Turn on electrical power to the system. The remainder of the startup process is auto‐
matic and is described as follows.
APU power comes on. The Purge LED next to the maintenance switch begins to blink.
The APU activates the fast purge function. Activation of fast purge can be verified by
the louder sound of air flow. Fast purge continues for approximately 8 minutes. During
this time the Purge LED next to the maintenance switch should blink intermittently.
Once the APU determines that the analyzer is properly purged, it activates power to
the analyzer. At this point the Purge LED next to the maintenance switch should stay
on constantly.
Once power has been applied to the main analyzer, complete startup of the system
(refer to startup procedures available in installation documentation). For systems with
APU, the Purge light next to the maintenance switch should remain on. For systems
without APU, the purge light on the Maintenance Panel or CIM display should remain
off.
5.5 Steps for Safe Startup of Maxum II
Safe Operation
61