2.1 Before You Begin
After unpacking the unit, check the equipment for compliance and any damage that may have occurred during shipment.
Immediately contact a Welker representative if you received damaged equipment.
When sealing fittings with PTFE tape, refer to the proper sealing instructions for the brand used.
All electrical connections must meet local and national electric codes, and excessive weight added to the conduit run must be
supported.
1.
The installation instructions are written with the assumption that the sampler has been purchased as part of a complete
sampling system. If the sampler has been purchased individually, a sampling system should be constructed in a fashion
compatible with the instructions in this
Installation, Operation, and Maintenance
(IOM)
Manual
.
2.
The sample probe should be located in the least turbulent area of the flowing stream available (i.e., not in a header or
blow-down stack and away from obstructions, elbows, and partially closed valves).
3.
Typically, the Welker GSS-4PM is installed with a single probe. The unique self-purging design of the GSS-4PM uses
process gas to supply the solenoid, thus purging the sample line prior to each sample grab. If auxiliary instrument air is
used to supply the solenoid, the customer must have a return port downstream of a moderate pressure drop (e.g., an
orifice plate or control valve) to create a bypass for the sampler, which will allow for a "real-time" sample to be taken
with each actuation of the sampler.
SECTION 2: INSTALLATION & OPERATION
9
IOM-022
MODEL: GSS-4PM
REV: F
13839 West Bellfort Street, Sugar Land, TX 77498
welker.com
Service Department 281.491.2331
