Dungs CPI 400 Panduan Instalasi - Halaman 2
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Required Wiring:
• Do not exceed the switches electrical ratings.
• Use 14 or 16 gauge wire for at least 75˚C (167˚F).
• For NEMA 4 applications, NEMA 4 conduit or wiring
methods must be used.
• Run one wire (the COMMON) to the L1 terminal, one
to the GROUND terminal, one from the terminal 2
"Proof Terminal" to the Proof of Closure terminal of the
Flame Safeguard, and one (the NEUTRAL) to L2 on
the CPI 400.
NOTE: If equipment neutral is not wired to L2 on the
CPI 400, the lights will not properly indicate the valve
position. The ORANGE light should be on when the
valve is closed, The GREEN light should be on when
the valve is open (FM and NPFA 86 requirement).
The CPI 400 must be calibrated to the specific valve it is
used on. Failing to properly calibrate this switch may lead
to nuisance problems or to an unsafe startup condition.
Calibrating the CPI: (Reference Fig. 2)
•
The CPI must be properly mounted to the valve, and
the valve must be closed.
•
Disconnect all power to the CPI 400 before adjusting to
prevent electrical shock and equipment damage.
•
Remove clear cover.
•
Turn the adjustment dial counterclockwise until it stops.
•
Then turn the adjustment dial clockwise until the switch
makes. If there is too much noise to hear the switch
trip, proceed to Calibrating the CPI in noisy environ-
ments.
•
Note the position of the set point in reference to the
white lines on the scale.
•
Turn the adjustment dial
clockwise to the same relative position.
•
Replace clear cover, the CPI is now adjusted.
Calibrating the CPI in noisy environments:
•
Verify that there are no stray wires that are potentially a
shock hazard while the dial is being manually adjusted.
Clear plastic cover
120Vac neon lights (one orange and one green)
24Vdc neon lights (one red and one green)
1/2"NPT conduit adapter (PG 11)
Fig. 2
Calibration and Testing
two additional increments
Replacement Parts
240-837
229-338
248-183
220-566
Wiring
L1
Do not wire this switch to close a circuit that
will directly power another safety shutoff
valve. Doing so could result in a safety valve
being energized and opened rather than remain-
ing closed.
•
Apply 120Vac to terminals L1 and L2 of the CPI.
•
Turn the adjustment dial counterclockwise until it stops.
The GREEN light should be illuminated.
•
Then turn the adjustment dial clockwise until the RED
light illuminates.
•
Note the position of the set point in reference to the
white lines on the scale.
•
Turn the adjustment dial
clock-wise to the same relative position.
•
Replace clear cover, and the CPI is now ready for
serivce.
Annual Testing
•
Perform a switch continuity test at least annually to verify
that with the valves de-engerzied, the continuity between
the switch contacts T3 (COM) and T2 (Proof Terminal)
does not exceed 5 ohms, and verify that there is no con-
tinuity between the switch contacts T3 (COM) and T1.
•
Then, energize the valve, and verify that the continuity
between the switch contacts T3 (COM) and T1 does not
exceed 5 ohms, and then verify that there is no continuity
between the switch contacts T3 (COM) and T2.
•
If any above check fails, do not use the CPI and contact
DUNGS immediately.
Fig. 3
two additional increments
Brass adapter (standard)
Brass adapter (Ni plated)
N
224-417
224-417B
2 ... 2