Danfoss VLT HVAC Drive FC 102 Installation Instructions Manual - Page 3

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Installation Instructions

Mechanical installation

Prepare the hole for the installation

The options to mount the PTU 025 unit on an IP55/66

enclosure include the following:

•

Factory-installed M25 tread.

•

Using the knock-out plate.

•

Making a new hole in the connection plate. Hole

diameter: 25 mm (0.98 in).

Illustration 1.2 PTU 025 Installation Hole

For grounding purpose, ensure that there is a good electrical

connection between the PTU 025 mounting star washer and

the enclosure.

To install PTU 025:

Place the gasket between the PTU 025 unit and the

enclosure. This is necessary for the IP55/66 rating.

Inside the enclosure, place the star washer, the

ground connection, and the nut. See Illustration 1.3.

Put the ground wire inside the enclosure through the

star washer, the ground connection, and the nut.

Rotate the unit to the required position. The unit can

be rotated 360°.

Fasten the nut with the momentum 5 Nm. The unit

cannot be rotated after fastening the nut. See

Illustration 1.4.

MI08A102

Pressure Transmitter Unit PTU 025

VLT

HVAC Drive FC 102

Illustration 1.3 The Nut, The Ground Connection, The Washer, The

Gasket

Illustration 1.4 Positioning the Unit