ISTEC 1820 Installation Instructions

1800 SERIES INSTALLATION INSTRUCTIONS

1. Before beginning the installation, verify that the system temperature, pressure and flow
rate do not exceed the ratings indicated on the meter.
2. The meter is designed to operate at a sustained flow of ½ the Maximum Flow Rating
(indicated as the Continuous Flow Rating). The meter should not be operated at the
Maximum Flow Rating for more than one hour per day as excessive wear and/or failure
will result.
3. Flush the pipeline thoroughly after any plumbing changes to eliminate the possibility of
foreign materials reaching the meter.
4. The ½" and ¾" meters may be installed in horizontal or vertical pipelines (either up or
down flow). To achieve the rated accuracy, there should be at least five (5) pipe
diameters of straight pipe (same size as meter) before and after the meter. The 1" through
2" meters have a specific flow orientation and must be installed accordingly. There is no
straight pipe requirement before or after the 1" through 2" (1820 only) meters. The 2"
(1825 only) and larger meters may be installed horizontally or vertically and require at
least five (5) pipe diameters of straight pipe (same size as meter) before and after the
meter. In horizontal installations, the flow counter should be facing straight upward.
5. Pay careful attention to the flow direction as indicated by the arrow cast into the meter
body.
6. It is highly recommended that a strainer be installed upstream of the meter inlet. It is also
recommended that a shutoff valve be located before and after the meter to facilitate
service.
7. Care should be taken to protect the meter from water hammer as well as freezing
temperatures.
8. The counter is calibrated in U.S. gallons and can not be reset. It will roll around to zero
after reaching its maximum reading. See page 2 for additional information on the
counter.
9. All 1800 Series meters are equipped with a pulse output (magnetically driven "dry contact
type" reed switch). Each contact closure is equal to one (1), ten (10) or one hundred (100)
gallons of water as indicated on the meter. The electrical rating of the switch is 0.2 amp
at 24 volt.
5 Park Lake Road, Init 6
SPARTA, NJ 07871
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