Section 2: Before You Begin
January 2017
ERNG-X
dopsm2107x012
Section 2: Before You Begin
5
waRNING
Complete system integration and design is the responsibility of the user. The following
are suggested malfunction design considerations but is not an all inclusive list.
•
Loss of ERNG-X controller power, loss of transducer power or loss of flow meter power
•
Interrupted or lost communication exchange to ERNG-X controller
•
Inlet solenoid malfunction leading to uncontrollable pressurization of spring case
on pipeline pilot regulator
•
Instability in system causing pressure swings
•
Back flow of high pressure gas into ERNG-X controller control port, exhaust port or
gauge port causing uncontrollable pressurization of the spring case of the pipeline pilot
regulator and/or over pressurization of the pressure rating of the ERNG-X controller.
•
Exhaust port corrosion from atmospheric salt and humidity
•
Decaying inlet of supply regulator causing over pressurization to ERNG-X controller
•
Spring case rating on pipeline pilot regulator
Special conditions for safe use of ER5050, see ER5000 Series User
Manual (DOPSM2064X012) for complete ER5050 product capabilities:
•
Rated for 20.5 to 28.5 VDC, 340 ma
•
Maximum working pressure: 110 psig / 7.5 bar
•
temperature Range: -20°C ≤ t
amb
≤ 60°C (-4°F ≤ t
amb
≤ 140°F)
•
Make sure everything is properly assembled before connecting and
applying power.
•
Do not open when an explosive atmosphere is present.
•
Installation to be in accordance with the latest edition of National Electrical Code.
•
The cable and conduit entries (1/2
"
-14 NPT) devices shall be certified flame proof
types, suitable for the conditions of use and correctly installed.
•
Unused conduit entries must be closed with suitable blanking element.
•
Seal conduit entry within 18 inches.
•
The user/installer shall not remove any of the three 1/8
"
-27 NPT plugs that are
fitted into the base of the enclosure as this will invalidate the Hazardous Locations
Certifications (See manual for locations).
•
when using natural gas as pilot media, ERNG-X complete product must be used.
The ER5050XX-1-002 by itself is not approved for natural gas.
•
Excessive moisture may cause internal corrosion to ERNG-X and filter maintenance
must be maintained to meet media quality requirements.
•
Exhaust, pressure relief and filter drains must be vented away per local code.
•
ERNG-X controller exhaust cannot be plumbed to pressure relief vent line or filter
drain lines.
waRNING
If a regulator or valve leaks or malfunctions, take it out of service immediately. You
must have instructions before doing any maintenance. Do not make any repairs you do
not understand. Have qualified personnel make repairs. Return any equipment in need
of service to your equipment supplier for evaluation and prompt service. Equipment is
restored to the original factory performance specifications, if repairable. There are flat
fee repair charges for each standard model. The original equipment warranty applies
after a complete overhaul.
