ITT Skotch Trifecta T4405F, Инструкции по установке, эксплуатации и обслуживанию

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ITT
Engineered Valves, LLC Page 8 of 24
Technical Manual No. IOT4400F Effective 8/31/2018
REV LEVEL B
For Model T4405F valves, the solenoid pilot valve is a dual coil momentary
contact type, rated for continuous duty at the service voltage.
Note: Never
energize both solenoid coils simultaneously. Doing so, will permanently
damage the solenoid valve.
For Model T4406F & T4407F valves, the solenoid pilot valve is a maintained
contact type, rated for continuous duty at the service voltage. Note that terminal
number 3 inside the junction box is not supplied as the solenoid is a single coil
spring return versus dual coil design.
Proof of Closure (POC) switches are provided for both the inlet and outlet valves
to individually monitor the status of each block valve. The outlet valve POC is
located on the top or actuator side and the inlet valve POC is located on the
bottom of the valve assembly. Logic is shown on the referenced wiring diagram.
POC switches change contact states prior to actual commencement of flow. Both
POC switches should be used to prove valve closure. It is recommended they be
monitored individually. Some valves may be equipped with an optional open limit
switch that is located on the bottom of the valve assembly and is tripped by the
inlet valve shaft. Valves with the optional open limit switch will have a total of
three (3) switches on them.
Note: Assemblies supplied with DPDT Switches provide all terminal points
noted on Wiring Diagram. Valves supplied with SPDT switches have a
reduce number of terminals. Reference drawing (60-018 - AC, 60-024 -
DC) for details.