Perma Pure Indi-GASS - Manual (Page 10)

GASS Module User Manual
10 Bulletin #217
3.3 Plumbing
A. Sample Connection
1. With unit securely mounted, connect sample line directly to ¼” or 3/8"
compression fitting on top of module. The 3/4” SS nipple sample inlet connection
can be used to attach customer supplied conduit fitting for rigid connection to heated
sample line (see Figure 4). If it is not being used,ensure it is well insulated to
prevent cold spots which causes sample condensation.
2. Connect ¼” NPT sample outlet port of GASS Module to sample line running to
analyzer.
B. Purge Inlet Connection
Purge gas must be of instrument grade with a dew point no higher than–40 O C.
1. Purge gas should be supplied to dryer via 0-30 slpm flowmeter and a regulator
capable of supplying 0-50 psig. Refer to flow schematic for proper setup.
2. Connect regulated purge gas supply line to 1/8" female NPT purge inlet port of
membrane dryer (labeled “Instrument Air”).
C. Purge Exhaust/Filter Drain Connection
With optional automatic filter drain –
With auto drain option, purge gas exhaust is combined with the filter drain.
Therefore, exhaust may contain acid condensate when drain valve is energized.
Connect line from eductor outlet to designated collection/exhaust basin
containing acid absorption media to prevent release of exhaust to surrounding.
Line should not restrict purge flow. A ¼” I.D. tubing can be used for runs up to
10 feet, or larger I.D. tubing for longer exhaust lines.
Without optional automatic filter drain –
Purge exhaust may contain water vapor. A line can be connected from purge outlet to
remote area if desired. Line should not restrict purge flow. A 1/4" I.D. tubing can be
used for runs up to 10 feet, or larger I.D. tubing for longer exhaust lines.
D. Purge Eductor Inlet Connection
Connect compressed air supply line to nozzle of eductor inlet via regulator capable of
supplying 0-50 psig.
Figure 4