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Maxum II Initial Startup Procedures

Important

Before proceeding with these procedures make sure the Maxum II is installed correctly in accordance

with these instructions and local and national codes. Refer to the custom documentation for particular

Maxum II details and/or procedures.

Instructions

Perform all the procedures in this section consecutively starting with inspection of the Electronics

Enclosure.

WARNING When the Electronic Enclosure door is open, voltage dangerous to life exists. These

procedures will involve operation of the unit with the electronics door open, which will require a

“hot work permit” in some locations to ensure that there are no hazards for the personnel

working in the area.

Inspection of the Electronics Enclosure

The following procedure visually checks that the connectors and plugs in

the Electronic Enclosure are properly connected.

WARNING/CAUTION The cable harness connectors and the

chassis plugs associated with the Heater power circuits are

marked with orange identifier tags. Before reconnecting any

connector or plug to a Heater power circuit, ensure that the

orange identifier tag on the connector or plug reads identical to

the orange identifier tag on its mating connector.

The ferrules connected on the gas supply side of the EPCM

manifold are composed of vespel-graphite. To prevent

damage, these ferrules must NOT be over-tightened. Proper

tightness is typically ½ turn past finger-tight.

 Ensure that the AC (Mains) power is off to the Maxum II.

 Open the electronic enclosure door and inspect all connections to the Power Entry Control

Module (PECM.)

 Inspect all SNE/DPM/EPC/SVCM connections (see WARNING/CAUTION above.)

Preparation and Inspection of the Oven Enclosure

The following procedure checks the oven operation.

 Ensure that all caps from vents on the sides of the oven (outside) have been removed.

WARNING All vent lines and oven exhaust should be vented outside the shelter. The vents

should be connected to a location where the pressure is atmospheric. Connection of oven or

analyzer vents to a variable pressure source such as a flare header should not be done as

chromatographic performance will be severely affected. Backpressure on the oven vent could

cause the T-rating of the instrument to be exceeded, which might become an ignition source.

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Siemens GC..M.. Installationshandbuch Seite 33