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Mechanical installation

Installation guide 762 VITO interfaces & VITO probes Page 6

2 Mechanical installation

The mechanical installation is divided into the following sub-chapters:

 Installation of 764/767/361/MRT temperature probe (section 2.2)

 Installation of 765 water probe, 766/768/365 Combi probe (section 2.3)

 Installation of 762 VITO Interface (section 2.5)

Caution

The VITO Interface and probe may be installed in hazardous areas.

Before starting installation, check whether the actual area of installation complies with the

area classification on the applicable approval certificate for your type of VITO Interface.

Notes:

The entire installation procedure shall be in accordance with national, local and

company regulations.

2.1 Recommended tools

Following tools are recommended for installation of the VITO Interface and probe:

 Spanners, size 32 mm (1” 4/16) and 36 mm (1” 7/16)

 Allen keys, size 4 mm (5/32”) and 2.5 mm (3/32”)

 Pair of wire cutters

 Flat head screw driver, 2 – 3 mm (2/16”)

 Wire stripper

 Teflon tape / pipe sealant

 Tie-wraps

2.2 Mechanical installation of 764/767/361/MRT temperature probe

The 764/767/361/MRT temperature probe can be installed in two ways:

 in an open or closed vertical thermowell or

 directly in the tank (using anchor weights)

2.2.1 Installation in a vertical thermowell

Minimal, a 2" thermowell must be used. The thermowell flange must be provided with a

G ½ (½” BSP) threaded opening and an earth screw for connection of the probe.

Preferably the thermowell should be perforated (holes or slots).

However, closed thermowells are a must for pressurized applications, and are

recommended for applications where aggressive products are stored.

Although it is not recommended, closed thermowells can be liquid filled for better heat

transfer between the stored product and VITO probe. Normal lube oil can be used, but

also glycol.

Care must be taken when the tank contains edible products in order to prevent product

contamination in the event of thermowell failure.

Honeywell Enraf VITO 764 User Manual

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