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Make all connections to the attached 25ft cable.
The most common causes of electronic failures are miswired connections during installation.
When adding additional cable, record and carefully document any substitution of wire colors.
Additional cable may be purchased from GREYLINE that will allow you to maintain the existing
color coding.
All electrical connections to the ISM 5.0 must be made through the 25ft cable provided with the
meter. This cable is not designed to be removed in the field, and any attempt to do so will
compromise the weather tight integrity of the enclosure. A watertight cable junction box
should be used for above grade connections to extended cable length. Special care is
required to ensure that the ISM 5.0 is connected to earth through the green/yellow earth wire.
This connection is required to prevent random electrical noise from interfering with the operation
of the meter. (See section 3.5.2 for details.)
CAUTION
Do not attempt to remove the existing cable or to remove the factory installed connection fitting.
Doing so will compromise the weather tight integrity of the enclosure and will void the warranty.
CAUTION
Only qualified personnel should attempt to make electrical connections to the ISM 5.0. Failure
to properly connect the ISM 5.0 power, signal or earth connections may result in damage to the
ISM 5.0 and/or to associated peripheral equipment.
3.5.1
Signal and Power Wiring Connections
Customer provided
conduit and adapters
above grade.
Output signal(s)
to control
system
½" FNPT
conduit connection
Allow enough slack
in the flexible liquid-
tight conduit to
permit the meter to
be removed
from the valve.
Insertion depth
gage provided
with each meter
FLOW
Install meter as shown using liquid-tight flex conduit and junction box. Leave sufficient slack in the
liquid-tight flex conduit to allow the meter to be removed without disconnecting cable. Run factory
installed meter cable to junction box above grade through liquid-tight flex conduit making connection to field
wires at this point.
3.5 WIRING CONNECTIONS
!
!
Greyline
Display or
BTU Meter
(Optional)
