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Elster American Gas Meter MTU Installation Instructions
Elster American Gas Meter
MTU Installation Instructions (Y20968-TUM Rev A)
FCC/ISED Compliance
This product/device has been tested and certified to be in compliance with all appropriate requirements
of both the FCC and ISED.
Any changes or modification to this product/device, or the use of any antenna other than the one
provided by or authorized with expressed written approval by Aclara Technologies LLC may void the
user's authority to operate this product/device.
This product/device and/or its antenna must be fixed-mounted on indoor or outdoor permanent
structure(s) providing a separation distance of at least 20 cm from all persons during normal operation.
This device is not designed (and it has no external connection) to operate in conjunction with any other
antennas or transmitters. No other operating instructions for satisfying RF exposure compliance are
needed.
This product/device has been tested and calibrated at the factory. It has no user adjustable controls and
can only be adjusted by authorized, trained personnel.
French translation
Conformité FCC/ISDE
Cet équipement a été testé et il est conforme à toutes les exigences appropriées de la FCC et de l'ISDE.
Tout changement ou toute modification à cet appareil, ou l'emploi de n'importe quelle antenne autre
que celle fournie par ou autorisée sous l'accord exprès donné par écrit d'Aclara Technologies LLC peut
annuler l'autorisation d'utiliser de cet appareil.
Cet appareil ainsi que son antenne doivent être montés de manière fixe sur des structures intérieures ou
extérieures permanentes en conférant une distance d'au moins 20 cm des personnes pendant le
fonctionnement normal. Cet appareil n'est pas conçu (et il n'a aucun branchement externe) pour être
utilisé en association avec toute autre antenne ou tout émetteur. Aucune autre instruction d'utilisation
n'est requise pour assurer la conformité aux règles d'exposition aux RF.
Cet appareil a été soumis à des tests et calibré en usine. Il n'a pas de contrôle d'ajustement et ne peut
être ajusté que par un personnel autorisé et qualifié.
This document contains information that is private to Aclara Technologies LLC, an Ohio limited liability company, and/or that is private to
Aclara Meters LLC, a Delaware limited liability company (individually or collectively “Aclara”). This information may not be published,
reproduced, or otherwise disseminated without the express written authorization of Aclara. Any software or firmware described in this document
is furnished under a license and may be used or copied only in accordance with the terms of such license. The information in this document is
subject to change without notice and should not be construed as a commitment by Aclara. Aclara assumes no responsibility for any errors that
may appear in this document. No responsibility is assumed for the use or reliability of software on equipment that is not supplied by Aclara.
Metrum Cellular, STAR, Synergize, and TWACS are registered trademarks of Aclara. 2011-2017. All Rights Reserved. Confidential and
proprietary.
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Elster American Gas Meter MTU Installation Instructions
Purpose & Scope
These instructions provide a procedure for installing a STAR direct-mount MTU on the following
Elster/American Gas Meters: AC-175, AL-175, AT-175, AC-250, AL-250, AM-250, AR-250,
AT-210/250, AT-350, AL-425, AC-630. These installation instructions cover the Aclara Catalog
numbers 3531-010-RBS2 and 3531-010-RBS2W for these gas meters.
Parts Required
# Item General Description Qty
1A MTU, GAS, OD2, DIR, AMRES,
STDRNG
1B MTU, GAS, OD2, DIR, AMRES,
EXTRNG
2 1/4-20 x 1.5" COMBO FIL HD, DP Screws 4
3 #8 x 3/8" CMB TRI-LOB, Z-SEAL Screws 2
4 #10 x 1/2" CMB TRI-LOB, Z-SEAL Screws 4
5 SNAP SEAL, GAS MTU, RESDNTL Tamper Plugs 4
N
OTE
The mounting kit contains the exact quantity of hardware required for a single installation. Keep
extra hardware on hand.
N
OTE
No repair or maintenance of MTU is required. Defective MTU will be replaced.
N
OTE
MTU may be wiped with damp cloth to prevent electrostatic charge hazard.
MTU Assembly 1
MTU Assembly 1
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Elster American Gas Meter MTU Installation Instructions
Tools Required
To mount the MTU to these meters, you will need the following tools and equipment:
• Phillips or slotted screwdriver
• Safety glasses
• Torque limiting screw driver
Remove Index
Before installing the MTU, remove all anti-tamper, safety, and security hardware from the clear index
cover.
1. Remove the four screws from the clear index cover.
2. Discard cover and screws.
NOTE: Do not install the MTU if any of the screws are broken.
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Elster American Gas Meter MTU Installation Instructions
3. Remove the two OEM screws from the index.
4. Set the index aside, and discard the old screws.
NOTE: If either of the OEM screws break during removal of the index, the remaining portion of the
screw must not protrude from the face of the meter. DO NOT install the MTU if there are any
protruding screws.
Mount Index to MTU/Pulser
1. Visually inspect the front of the MTU assembly and ensure that the coupler is properly engaged
with the gear shaft and that the coupler contains the magnet.
NOTE: Gear and Coupler are pre-assembled in the MTU.
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Elster American Gas Meter MTU Installation Instructions
2. Visually inspect the back of the MTU assembly to check that the pre-applied gasket is properly
adhered to the back.
3. Mount the index onto the MTU by inserting the two #8 x 3/8" screws into the holes on the bottom
plate of the index.
4. Start one of the screws into its mounting hole.
5. Slide the index beneath the screw aligning the wiggler on the index with the MTU coupler.
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Elster American Gas Meter MTU Installation Instructions
6. Start the second screw keeping the coupler and wiggler aligned.
7. Tighten both screws to a torque of 4-8 inch-pounds.
CAUTION! Do not over tighten screws. Excessive torque may damage the MTU enclosure.
8. Check that the index is properly engaged by rotating (clockwise and counterclockwise) the gear on
the back of the MTU and ensuring the index dials are rotating without obstruction.
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Elster American Gas Meter MTU Installation Instructions
Mount MTU Assembly to Meter
1. Insert the four 1/4-20 X 1.5" screws through the holes on the MTU.
2. Align MTU gear opening with the wiggler on the meter.
3. Tighten the four 1/4-20 X 1.5" mounting screws to 12-16 inch-pounds.
CAUTION! Do not over tighten screws. Excessive torque may damage the MTU enclosure.
Note: Gear shown below is detached from the MTU for illustration purposes only.
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Elster American Gas Meter MTU Installation Instructions
4. Place the new cover over the index and align the magnet in the index cover so that it seats in the
recess in the MTU.
5. Align the index cover with the mounting holes on the MTU, and secure it using the four #10x1/2"
screws.
6. Tighten the four #10x1/2" screws to 8-12 inch-pounds. The index cover gasket will be compressed
slightly.
CAUTION! Do not over tighten screws. Excessive torque may damage the MTU enclosure.
7. Install the four Tamper Plugs in the index cover screw towers.
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Elster American Gas Meter MTU Installation Instructions
Putting the Device into Service
Program the MTU using the MTU Programmer software and the Field Programmer.
To take the device out of service, follow the instructions for putting the device into service in reverse
order.
MTU ID Label Examples
N
OTE
Specific Conditions of use in hazardous locations indicated on label.
List of Standards
1. ANSI/ISA 12.12.01
2. CSA 22.2
N
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Training can be provided by Aclara or Aclara can train and certify third party installers. Installers
may be anyone certified by Aclara.
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Elster American Gas Meter MTU Installation Instructions
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