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ELSTER RABO
Rotary Gas Meter
®
3.5M-5.5M
Horizontal Flow
Figure 26. Support bracket attachment
(2) Using a 5mm Allen wrench, loosely install two M6 socket
head cap screws through the support bracket into the
meter case cover [Figure 26]. The screws will be
tightened after alignment of all parts.
xiii) Install the adaptor plate assembly
(1) Lubricate the adaptor plate assembly o-ring with silicone
o-ring grease, light machine oil or petroleum jelly.
(2) Carefully align the slot of the output shaft to the flat of the
ID index output [Figure 27].
RABO
®
Rotary Gas Meter
ID OUTPUT
RABO
®
Rotary Gas Meter
13. Thermowell
RABO
Rotary Gas Meter
®
All RABO meters come equipped with two (2) ¼" NPT auxiliary
ports on the meter body [Figure 18], which can be used for sensing
pressure and temperature of the flowing gas. A thermowell is
13. Thermowell
13. Thermowell
required when using a temperature sensing device. Thermowells
All RABO meters come equipped with two (2) ¼" NPT auxiliary
All RABO meters come equipped with two (2) ¼" NPT auxiliary
are available as accessories to the meter.
ports on the meter body [Figure 18], which can be used for sensing
ports on the meter body [Figure 18], which can be used for sensing
pressure and temperature of the flowing gas. A thermowell is
pressure and temperature of the flowing gas. A thermowell is
NPT AUXILIARY PORTS
required when using a temperature sensing device. Thermowells
required when using a temperature sensing device. Thermowells
are available as accessories to the meter.
are available as accessories to the meter.
Figure 27.
NPT AUXILIARY PORTS
(3) Fully insert the adaptor plate assembly post into the
NPT AUXILIARY PORTS
index cover output hole.
(4) Orient the adaptor plate to the desired direction
(4 positions are possible: Facing away from the meter,
facing the meter, facing the meter inlet, or facing
the meter outlet).
xiv) Using a 5mm Allen wrench, install two M6 socket head
cap screws through the adaptor plate into the support
bracket assembled in a previous step [Figure 28]. Tighten
to 45-50 in-lbs.
SOCKET HEAD
Figure 18. Auxiliary ports
CAP SCREWS
Figure 18. Auxiliary ports
Figure 18. Auxiliary ports
a) Installing a Thermowell
a) Installing a Thermowell
a) Installing a Thermowell
1.
If meter is not installed in the gas piping, go to Step 5.
2.
Slowly open bypass valve.
1.
If meter is not installed in the gas piping, go to Step 5.
1.
If meter is not installed in the gas piping, go to Step 5.
3.
Slowly close the meter's outlet valve, then the inlet valve.
2.
Slowly open bypass valve.
2.
Slowly open bypass valve.
3.
Slowly close the meter's outlet valve, then the inlet valve.
4.
Slowly, completely depressurize the meter piping.
3.
Slowly close the meter's outlet valve, then the inlet valve.
4.
Slowly, completely depressurize the meter piping.
4.
Slowly, completely depressurize the meter piping.
5.
Remove one of the plugs in the meter body by using a
5.
Remove one of the plugs in the meter body by using a
5.
Remove one of the plugs in the meter body by using a
¼" hex key.
¼" hex key.
¼" hex key.
6.
Apply Teflon tape or pipe dope to the male threads of the
6.
Apply Teflon tape or pipe dope to the male threads of the
6.
Apply Teflon tape or pipe dope to the male threads of the
thermowell. Wipe excess pipe dope off the thermowell
thermowell. Wipe excess pipe dope off the thermowell
thermowell. Wipe excess pipe dope off the thermowell
Figure 28.
probe and leading threads to ensure no pipe dope
probe and leading threads to ensure no pipe dope
probe and leading threads to ensure no pipe dope
enters the metering chamber.
enters the metering chamber.
enters the metering chamber.
xv) Using a 3mm Allen wrench, install two set screws through
7.
Screw the thermowell into the meter and tighten to
7.
Screw the thermowell into the meter and tighten to
7.
Screw the thermowell into the meter and tighten to
the index cover neck to secure the adaptor plate assembly
18 ft-lbs.
18 ft-lbs.
18 ft-lbs.
[Figure 29]. Tighten snuggly.
8.
Re-pressurize the meter as instructed in Start-up/
8.
Re-pressurize the meter as instructed in Start-up/
8.
Re-pressurize the meter as instructed in Start-up/
Commissioning (see section 6).
Commissioning (see section 6).
Commissioning (see section 6).
15. Troubleshooting
15. Troubleshooting
15. Troubleshooting
14 Honeywell
3.5M-5.5M
Vertical Flow
11 Elster Instromet
11 Elster Instromet
OUTPUT
SHAFT
SLOT
SET SCREWS
Figure 29. Set screw installation
xvi) Tighten the two M6 socket head cap screws installed earlier
(to affix the support bracket to the meter case cover)
to 45-50 in-lbs.
xvii) Install security seals as required.
(1) Security wires are included to secure the index cover
mounting screws and the support bracket lower
mounting screws.
(a) To install, feed the security wire through the holes in
the drilled head screws, thread the free end of the
wire through the hole in the center of the seal, pull
tight, and snap the seal together.
(2) Red Security seals (plugs) are included to seal the support
bracket upper mounting screws.
14. Auxiliary Equipment Mounting
11 Elster Instromet
(a) To install, press the seals in the adaptor plate holes
over the screws until they are fully seated.
All RABO meters are equipped with threaded holes for mounting
compact, lightweight auxiliary equipment [Figures 19 and 20].
15. Auxiliary Equipment Mounting
All holes are M6 x 1 by 10mm deep. Heavier equipment should
14. Auxiliary Equipment Mounting
14. Auxiliary Equipment Mounting
be pipe or wall mounted adjacent to the meter. Elster provides
All RABO meters are equipped with threaded holes for mounting
All RABO meters are equipped with threaded holes for mounting
All RABO meters are equipped with threaded holes for mounting
customized brackets for commonly used equipment [Figure 21].
compact, lightweight auxiliary equipment [Figures 30 and 31].
compact, lightweight auxiliary equipment [Figures 19 and 20].
compact, lightweight auxiliary equipment [Figures 19 and 20].
Please contact your local Elster representative for details.
All holes are M6 x 1 by 10mm deep. Heavier equipment should
All holes are M6 x 1 by 10mm deep. Heavier equipment should
All holes are M6 x 1 by 10mm deep. Heavier equipment should
be pipe or wall mounted adjacent to the meter. Elster provides
be pipe or wall mounted adjacent to the meter. Elster provides
be pipe or wall mounted adjacent to the meter. Elster provides
ACCESSORY
customized brackets for commonly used equipment [Figure 21].
customized brackets for commonly used equipment [Figure 32].
customized brackets for commonly used equipment [Figure 21].
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Please contact your local Elster representative for details.
Please contact your local Elster representative for details.
Please contact your local Elster representative for details.
ACCESSORY
ACCESSORY
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Figure 19. Horizontal installation
Figure 30. Horizontal installation
Figure 19. Horizontal installation
Figure 19. Horizontal installation
Figure 32. Auxilary equipment mounted
Figure 21. Auxilary equipment mounted
Figure 21. Auxilary equipment mounted
Figure 21. Auxilary equipment mounted
ACCESSORY
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ACCESSORY
ACCESSORY
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Figure 20. Vertical installation
Figure 20. Vertical installation
Figure 31. Vertical installation
Figure 20. Vertical installation
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Troubleshooting
