Air Products GASGUARD TE10, Инструкция по установке, эксплуатации и обслуживанию

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GASGUARD
®
TE10 Distribution System Manual
Air Products and Chemicals, Inc. Page 3 - 8
3.6.1 Z-purge Procedure
The Z purge pressure is controlled by a needle valve at rear of controller. After
opening the controller in a suspected hazardous area it is necessary to use the
following procedure to re-establish the Z-purge before operating the controller:
1. Close the controller front and tighten both latches completely.
2. Open the needle valve 4 to 5 turns (counter-clockwise). Allow the controller
to purge for 20 minutes.
3. Adjust needle valve to satisfy the “Z-Purge” alarm (approximately 2 total turns
open).
Flow requirements to operate the solenoid valves are very small, less than 1 LPM
(2 CFH). If Type Z purge is required, a flow rate of 3-10 LPM (6-21 CFH) will
be needed, depending on the tightness of the individual controller and the
installation.
Figure 3.5: Rear View of GASGUARD TE10 Controller