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GeNeRAL INFORmATION, INSTALLATION and mAINTeNANCe
GeNeRAL INFORmATION
FTB8000B (cold water) and FTB8000HW Series (hot water)
meters use the internationally-accepted multi-jet principle. A
gear train drives the register totalizer dials. For pulse output,
one of the pointers is replaced by a magnet arm, which is
detected by an encapsulated sensor attached to the outside
of the lens.
PR meters use a solid-state, long-lasting Hall-effect sensor,
which requires power. They are suited for use with Omega
controls and metering pumps (LMI for instance) that have
sensor power.
PT meters use a reed switch. They provide a dry contact clo-
sure and do not require power.
Standard meters do not have a sensor, and they totalize
only.
INSTALLATION
Position. FTB8000B and FTB8000HW Series meters should
be installed horizontally with the register up. Vertical mount-
ing will result in some degree of under-measurement and
shortened life of the bearings. No upstream straight pipe is
required.
WARNING
DO NOT INSTALL
meTeR IN OveRHeAD
INDOOR PIPING OR
WHeRe LeAkAGe
mAy CAuSe DAmAGe
Couplings. Male NPT threaded couplings are included with
each meter. The threads on the end of the meter are IPS
straight threads one size bigger than the meter size. Though
it is possible to thread a standard pipe coupling directly onto
the meter for close coupling, the included couplings are much
preferable because they provide a union connection for meter
service. Be sure to use the included gasket between the end
of the meter and the coupling.
Connections. PR and PT sensors are supplied with a color
coded output cable (see diagram, page 4). Optional connec-
tors can be ordered to plug directly into an Omega control or
LMI metering pump.
Page 2
Caution: These water meters are
not recommended for installation
in uninsulated suspended ceil-
ings where freezing is possible,
or in any overhead indoor piping
configuration where leakage may
cause damage.
SPeCIFICATIONS*
6 mA at 12 Vdc (PR only)
Power
Temperature
105˚ F (40˚ C) max (8000B version)
Cold Water
194˚ F (90˚ C) max (8000HW version)
Hot Water
150 psi operating
Pressure
Cast bronze, epoxy powder coated inside and out
materials Body
Engineered thermoplastic
Internals
Alnico
magnet
+/- 1.5% of reading
Accuracy
Pulse Output
Hall-effect
Sensor
20 mA
max Current
24 Vdc
max voltage
12' (4 m) standard (2000' maximum run)
Cable Length
3/4"
Flow Rates (GPm)
0.22
minimum
22
**maximum
*Specifications subject to change.
**CAuTION: Excessive flow can cause breakage.
Do not exceed recommended maximums.
Pulse Output. Both PR and PT sensors respond to
a magnet that rotates on the face of the meter under
the lens. The sensor turns on and off once each time
the magnet passes under it. Sensors are designed for elec-
tronic control loads, and should not be used to switch power
loads or line voltages. See maximum current and voltage
ratings, under Specifications.
mAINTeNANCe
Omega recommends all service to be performed by an autho-
rized distributor or the factory to maintain the integrity of the
protective tamper-proof wire-and-seal.
Inlet Strainer. Clean the strainer yearly, or as required, de-
pending on water condition. Pull out the strainer or backflush
the meter to loosen trapped particulates.
Calibration. Meters used for billing or billing exemp-
tion may be regulated by state or local authorities. New
meters are factory-tested to meet the AWWA C-708
Multi-Jet Meter accuracy specification. Some states
require retesting at various intervals, typically eight years for
3/4" meters, six for 1", and four for 1-1/2" and 2". Meters
used for control should be tested every 5-10 years. Testing
can be done by the factory or local meter shops authorized
for this purpose. Please contact Omega before sending
meter in for calibration or servicing.
PR
PT
Standard
Reed switch
Totalizer only
20 mA
24 Vdc or Vac
1"
1-1/2"
0.44
0.88
52
88
n/a
n/a
2"
1.98
132
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