Dungs CPI 400 Manual de instalación - Página 2
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Imprimir páginaRequired Wiring:
• Do not exceed the electrical ratings given in the switch
specifications.
• Use 14 or 16 guage 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 NO terminal to
the Proof of Closure terminal of the Flame Safeguard,
and one (the NEUTRAL) to L2 on the CPI 400.
NOTE: If N is not wired to L2, the lights will not prop-
erly indicate the valve position. The ORANGE light
shall be on when the valve is closed, The GREEN light
shall be on when the valve is open (FM and NPFA 86
requirement).
Fig. 2
The CPI 400 must be calibrated to the specific valve it is used
on. Failing to properly calibrate this switch may need 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 by chance there is too much noise to hear
the switch trip, proceed to Calibrating the CPI in noisy
environments.
• Note the position of the set point in reference to the
white lines on the scale.
• Turn the adjustment dial two additional increments clock
wise 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.
Calibration and Testing
• 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 two additional increments clock-
wise to the same relative position.
• Replace clear cover, the CPI is now adjusted.
Annual Testing
• Perform a switch continuity test at least annually to verify
that there is continuity between the switch contacts 3
(COM) and 2 (NO), and verify that there is no continuity
between the switch contacts 3 (COM) and 1 (NC).
• Then, energize the valve that the CPI is mounted to, and
verify that there is continuity between the switch contacts
3 (COM) and 1 (NC). Then verify that there is no continuity
between the switch contacts 3 (COM) and 2 (NO).
• If any above check fails, do not use the CPI and contact
DUNGS as soon as possible.
Fig. 1
Fig. 3
NO contact is open when valve is OPENED.
NO contact is closed when valve is CLOSED.
O-Ring
Pin
Brass Adapter
Set Screw