GPL 750 Manual

Installation and
Maintenance Manual
GPL 750
Natural Gas Odorization
System
Patented
GPL Odorizers
12450 W. Cedar Drive
Lakewood, CO 80228
303 927-7683
[e-mail]
www.GPLodorizers.com
www.LincEnergySystems.com (master distributor)

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303-927-7683
GPL Odorizers LLC
12450 West Cedar Drive
Lakewood, CO 80228
[e-mail]
Thank you for your purchase of the GPL 750 Natural Gas Odorization System. You will find the GPL 750
Installation and Maintenance manual in the pages that follow.
Please understand that failure to adhere to these instructions may void warranty, destruction of
property, injury, or even death. Our service contracts are a convenient and cost-effective way to protect
your warranty coverage as well as your property. If you are interested in learning more about our GPL
Odorizers Maintenance Program to ensure that your unit remains functioning correctly, please call us
today at [phone].
Thank you for your trust in our products.
Garrett Cox
Director of Operations
GPL Odorizers LLC

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Do not install, maintain, or operate this equipment without reading, understanding, and following the GPL
Odorizers instructions. Otherwise, injury or damage or both may result.
Copyright
© 2017-2022 by GPL Odorizers LLC. All rights r es er v e d .
The information contained in this document is subject to change without notice. No part of this document may be reproduced or
transmitted in any form or by any means, electronic or mechanical, including photocopying and recording for any purpose without
the express written permission of the manufacturer. The GPL 750 is protected by US patent # 7,056,360 and other pending patents.
Limit of Liability
GPL Odorizers, its employees, agents, and the authors and co n tr i b u t o r s to t hi s document specifically di s c l a im all liabilities
and warranties, express
or implied (in c l udin g warranties of merchantability and fitness for a particular purpose), for the
acc
urac y, currency, completeness, and/or reliability of the information contained herein a n d/o r
for the fitness for any
particular use and/or for the performance of any material
a n d/
or equipment selected in whole or part with the user
of/or in reliance
on information contained herein. T he selection of materials and equipment is at the sole risk of the
user
o f this p u b lic a t ion.
Note
The information contained in this document is subject to change without n o t ice.

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Contents
Safety Information......................................................................................................................................... 6
General Safety Precautions ........................................................................................................................... 6
Warning Labels.............................................................................................................................................. 7
1.1 GPL 750 System Components.............................................................................................................. 8
1.2 Odorant Filter ...................................................................................................................................... 9
1.3 Pressure Regulator .............................................................................................................................. 9
1.4 Solenoid Valve ..................................................................................................................................... 9
1.5 Metering Valve .................................................................................................................................... 9
1.6 Optical Comparator........................................................................................................................... 10
1.7 HMI/PLC ............................................................................................................................................10
1.8 Drip Chamber and Optical Array........................................................................................................ 11
2.0 Principles of Operation..........................................................................................................................12
3.0 Installation ............................................................................................................................................ 13
3.1 Site Requirements ............................................................................................................................. 13
3.1.1 Unit Location ..............................................................................................................................13
3.1.2 Blanket Gas................................................................................................................................. 14
3.1.3 Electrical Power ......................................................................................................................... 14
3.2 Equipment and Tools.........................................................................................................................14
3.3 Tubing................................................................................................................................................14
3.4 Wiring................................................................................................................................................15
3.4.1 Electrical Connections ................................................................................................................16
3.4.2 Terminal Block 2 ......................................................................................................................... 22
3.5 Leak Testing....................................................................................................................................... 24
3.6 Purging the Odorant Line ..................................................................................................................25
3.7 Unit Configuration............................................................................................................................. 25
3.7.1 Setting up the Modem ............................................................................................................... 25
3.7.2 Configure Using Webpages........................................................................................................27
3.7.3 Configure Using the HMI ...........................................................................................................27
3.8 Optical Comparator ...........................................................................................................................28

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3.8.1 Calibrate Optical Comparator....................................................................................................28
4.0 Accessories............................................................................................................................................30
4.1 Included.............................................................................................................................................30
4.1.1 Sonic Muffler..............................................................................................................................30
4.2 Optional ............................................................................................................................................ 30
4.2.1 120VAC Hazardous Location Heater..........................................................................................30
4.2.2 120VAC to 24VDC Converter Power Package ............................................................................30
4.2.3 GPL 100 Thermal Mass Flow Meter ...........................................................................................30
5.0 Tanks .....................................................................................................................................................31
6.0 Standard Warranty ................................................................................................................................31
7.0 Factory Assistance................................................................................................................................. 34
8.0 GPL 750 Maintenance Operations ........................................................................................................35
8.1 Weekly ..............................................................................................................................................35
8.2 Monthly.............................................................................................................................................35
8.3 Yearly................................................................................................................................................. 35

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Safety Information
Please read the entire manual before attempting to unpack, set up, or operate this product. Failure to
do so could result in serious personal injury and equipment damage. Pay careful attention to all
Warnings, Cautions, and Notes.
Use of Hazard Information
If multiple hazards exist, the signal word corresponding to the greatest hazard shall be used.
Definitions
DANGER indicates a hazardous situation exists that may result in death or serious
injury if not avoided.
WARNING indicates a hazardous situation exists that could result in death or
serious injury if not avoided.
CAUTION, used with the safety alert symbol, indicates a hazardous situation exists
that could result in minor or moderate injury if not avoided.
NOTICE is used to address practices unrelated to personal injury, which could lead
to property damage.
NOTE: Information that requires special emphasis.
SHALL: This word is understood to be mandatory.
SHOULD: This word is understood to be advisory.
General Safety Precautions
Selection, Installation, and Use
Improper selection, installation, or use can cause personal injury or property
damage. It is solely the responsibility of the user, through its own analysis and
testing, to select products suitable for their specific application requirements,
ensure they are properly maintained, and limit their use to their intended
purpose.

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Follow proper local, state, and federal regulations for proper installation and
operational requirements.
Always use caution and common sense when working with any chemical. Read
the product label and MSDS carefully and follow the instructions exactly.
Potential Equipment Hazards
Hot surfaces! This equipment may have very hot surfaces. If an operator
contacts a hot surface, an injury may occur. Use protective clothing to prevent
injury. If other equipment comes in contact with a hot surface, damage to the
equipment may occur. Ensure the area around this equipment is kept clear to
prevent damage from occurring.
High pressures! This equipment may contain fluids at very high pressures.
Before installing, removing, or maintaining this equipment, ensure that the
equipment is isolated from all connecting piping, the equipment is
depressurized, the contents have been drained, and the equipment is cool.
When changing any electrical or electronic parts, the power must be turned off,
or the warranty is null and void.
Warning Labels
Location
Content
Power Strip
Before connecting power
1. Install an appropriately sized fuse per local electrical code.
2. Wire Sized for 24VDC@6A
3. Isolated from Pipeline
4. Proper power protection
5. Conduit per Hazardous Location Standards

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1.0 Overview
The GPL 750 natural gas odorizer accurately doses the gas with odorant in individual droplets of 0.01
cc. The optical sensor counts each droplet and feeds the information back to the controller. The
controller measures the flow and injects the next odorant dosage when sufficient gas has passed.
The actual dose is calculated and optimized based on flow rate requirements and the configured
injection rate. The measure can vary from one to multiple drops to provide optimal and consistent
odorization and maximize the component life. The target period between doses is three minutes.
The optimization algorithm creates some variation in the duration between doses to compensate for
the effects of flow rate fluctuations.
1.1 GPL 750 System Components
Class I Div. 2 Featured in Illustration

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1.2 Odorant Filter
The continuous mode provides a constant
odorant flow into the stream at appropriate
proportions. Use the continuous mode for gas
flow rates higher than 100 MSCFH.
1.3 Pressure Regulator
The pressure regulator allows the customer to
adjust odorant pressure. A sensing line is
connected to the gas pipeline so the regulator
can react to fluctuating pipeline pressures and
keep the differential constant (similar to a
dome-loaded regulator). The pressure gauge
reflects the odorant outlet pressure.
1.4 Solenoid Valve
The solenoid valve controls the flow
of odorant to the pipeline. When the
unit injects a batch of odorant into the
pipeline, the solenoid opens; the valve
closes when the desired amount of
odorant is injected. Normally, the
valve is closed for safety. In the event
of power loss or solenoid failure, the
valve can be opened manually. Per
GPL Warranty, this valve must be
replaced after 1,000,000 cycles. The
PLC triggers an alarm when the cycle
limit is reached.
1.5 Metering Valve
The metering valve regulates the drip
rate of the odorant into the pipeline.
To decrease the drip rate, turn the
valve clockwise. To increase the drip
rate, turn the valve counterclockwise.
This valve has a hex key that allows
the technician to lock the valve into
place
Odorant Filter

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1.6 Optical Comparator
The optical comparator and arrays use fiber
optics to count drops as they fall through the
drip chamber and into the line. Even with tiny
doses, the reliable counting of drops drives the
injection system’s accuracy.
The optical array on one side of the drip
chamber transmits a beam that is picked up by
the array on the opposite side. When the beam
intensity suddenly changes, the comparator
registers a drop. When the comparator “sees” a
drop, it transmits a signal to the PLC.
•Green light - Comparator is powered
(always on)
•Red light - The arrays are locked onto each
other (always on)
•Yellow light - A drop has fallen. If there is
more or less than one flash per drop, the
comparator must be calibrated.
1.7 HMI/PLC
The HMI/PLC controls all operations
of the odorizer. All inputs/outputs are
connected to the PLC (Solenoid
actuation, flow signal, odorant drip
count, etc.). The bright LCD and
touchscreen allow the technician to
control and configure all settings of
the odorizer. This PLC is available with
a heated display for cold weather
applications.
Controller
Optical Comparator