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DB Series Nitrogen Generator DB5-20 Model
6. Startup and Shutdown
6.1 Pre-Startup Procedure
ENSURE ALL INFORMATION UNDER SECTION 2 "INSTALLATION AND COMMISSIONING"
IN THIS USER MANUAL HAS BEEN READ IN FULL AND COMPLETED BEFORE STARTUP.
Following proper installation of the generator, make sure all shipping plugs found on manual drain
valves (MDVs) and outlet ports of relief valves (PSVs) have been removed. Check to make sure the
generator's pre and final filter elements are properly installed.
Verify that all piping/hosing connections to and from the generator are secure. If using hosing, install
hose safety whip checks.
Follow the compressor manufacturer’s instructions for proper installation, startup and operation of the
compressor. Set the compressor to unload at 125 psig and load at 110-115 psig.
For new startups, follow instruction in Section 6.2 "Initial Startup." If re-starting a generator where high
purity nitrogen is already stored in the nitrogen buffer tank (NST 101), follow instructions in Section 6.3
"Normal Startup."
IMPORTANT! DB units require approximately two hours of run time to achieve rated purity. Time to
reach purity may take longer for higher purity requirements. Nitrogen generated during this startup
period should be vented to atmosphere to avoid contaminating downstream processes. It is recom-
mended that a manual block and vent valve be installed at the nitrogen outlet to allow for nitrogen
purging during startup.
Only competent personnel trained, qualified, and approved by Parker should perform
installation, commissioning, service, and repair procedures.
Nitrogen is an inert, non-toxic gas. It can act as a simple asphyxiant by displacing oxygen
in air. Inhalation of Nitrogen in excessive concentrations can result in unconsciousness
without any warning symptoms such as dizziness, fatigue, etc. Install the generator in a
well-ventilated area and oxygen monitoring equipment.
WARNING
Due to the nature of operation, there is a possibility of oxygen enrichment surrounding
the generator. Ensure that the area is adequately ventilated. Where the risk of oxygen
enrichment is high, such as a confined space or poorly ventilated room, the use of
oxygen monitoring equipment is advisable.
WARNING
WARNING
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