Dungs CPI 400 Manuel d'installation - Page 2

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Required 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

Brass Adapter

Set Screw