NIVELCO NIPRESS DD-400, User Manual

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4. INSTALLATION
With the mounting bracket the transmitter can be mounted on smooth surfaces or walls. The mounting bracket is screwed onto the plastic housing of the transmitter.
Remove the blind caps and use the screws. The use of a sealing armature is required for the device to be replaced during operation. A simple ball valve is suitable for
lower pressures; higher pressures (above 6 bar) require a three-way blow-off valve. The pressure ports of the device are marked. Make sure that the higher pressure
is connected to the input “P+”, the lower pressure is connected to the input “P-” pressure port!
4.1 INSTALLATION INSTRUCTION
Install the device only in a depressurized and disconnected state!
The medium may be dangerous; therefore, suitable protective clothing, gloves, and goggles are required for the installation process.
Remove the packaging and the protective cap just before the beginning of the assembly to avoid any damage to the diaphragm. Keep the protective cap! In case the
unit is not installed immediately, the protective cap must be put back on as soon as possible! Treat any unprotected diaphragm with utmost care, as it can be damaged
very easily.
Torque must only be transmitted to the hexagonal screw on the instrument body (torque wrench). When installing the device, avoid applying strong mechanical stress
on the pressure port! It will result in a shift of the characteristic curve or damage the device.
The transmitter housing is grounded to suppress electronic noise. If the grounding of the device is correct, no further grounding is needed, otherwise the instrument
must be grounded.
Positioning the display:
The display and the operating module can be rotated for easy readability even in unusual mounting positions. The pivoting of the module is limited. Do not rotate the
display beyond the rotation limits.
Tightening torques:
¼" BSP: max. 20 Nm; ½" BSP: max. 50 Nm;
¼" NPT max. 30 Nm; ½" NPT max. 70 Nm;
The specified tightening torques must not be exceeded!
Installation steps for BSP process connection (DIN 3852):
Do not use any additional sealing material such as Teflon tape!
Check if the O-ring is intact, its surface even and clean and seat in the designated groove
accurately. Screw the device into the correct thread by hand! If your device is to be secured with a knurled ring instead of a hexagon head screw, the pressure
transmitter should only be tightened by hand! Devices with hexagon head screw mounting must be tightened using a suitable open-end wrench (torque wrench)!
Do not use any additional sealing material such as Teflon tape! Check if the O-ring is undamaged, its surface is flawless and clean and it is seated in the designated
groove. Screw the device into the correct thread by hand! If your device is secured with a knurled ring instead of a hexagonal screw, the pressure transmitter must
only be tightened by hand! Devices with hexagonal screw mounting must be tightened using an open-ended wrench (torque wrench)!
Installation steps for NPT process connection:
Use suitable seal (e.g. a PTFE-strip)! Screw the device into the correct thread by hand, and tighten it with a wrench!