9
YT-870/875 series
3. Installation
3.1
Safety
When installing a unit, please ensure to read and follow safety instructions.
Check unit’s specification and ensure to use as specified.
Follow other explosion proof procedures and safety precautions.
Use bypass valve or other supportive equipment to avoid entire system “shut down”.
YT-870 series is designed for explosion area.
Make sure all input and supply pressure to valve, actuator, and other related devices
must be turned off.
3.2
YT-870/875 Installation
1. Assemble limit switch box body with the bracket provided.
2. Align the main shaft of the limit switch box with the stem of the actuator. After the
alignment, tighten the bracket onto the actuator.
4. Connection – Power
4.1
Safety
When installing a unit, please ensure to read and follow safety instructions.
When installing in hazardous and explosive gas area, conduit tube or pressure-proof
packing union must be used.
Before connecting terminal, ensure that the power is off completely.
Do not open the
cover when the power is still alive.
Please use ring-type rug to protect against vibration or any other external impact.
Please use twisted cable with conductor section are 1.25mm
2
and that is suitable for
600V (complying to the conductor table of NEC Article 310.) The outer diameter of the
cable should be between 6.35 ~ 10mm. Use shield wire to protect against electro-
magnetic field and noise.
Please do not install the cable near high noise equipments, such as high-capacity
transformer or motor.
