Perma Pure Indi-GASS User Manual
Page 11
GASS Module User Manual
11
Bulletin #217
4 Start-Up Procedure
4.1 Setup Check
1.
Check electrical, sample, purge, and drain connections have been made and set
temperature controller(s) to desired setpoint(s).
2.
Turn on instrument and/or compressed air to system.
4.2 Purge Air Flow Adjustment
1.
To achieve correct vacuum of 5” Hg to drain acid condensate from filter, set
purge air eductor pressure to 25 psig.
2.
Adjust purge air flow to 20 l/min before applying power to temperature controller.
3.
Check purge air is exhausting from system.
4.3 Preheating the System
1.
Turn on AC power to system.
WARNING!
2.
Recheck purge air is exhausting from system.
3.
Set temperature controller of dryer heater 5-10°C above expected sample
dewpoint temperature.
4.
Do not flow sample until dryer temperature has come up to desired setpoint.
5.
If temperature controller is utilized to control filter heater, set it’s temperature
slightly above expected sample dewpoint temperature.
6.
Wait for filter to come to set temperature.
7.
At this point, sample flow may be started.
DO NOT BEGIN SAMPLE FLOW AT THIS TIME! If, for any reason, there
is no purge air or flow is inadequate, turn off AC power before
attempting to locate problem. Operating system with little or no purge
air can cause permanent damage to membrane dryer assembly.