VCG202/EN M/H11
Technical
electronic circuitry, or modification work, should be carried out in a Special Handling Area
such as described in the above-mentioned BS and IEC documents.
2.3 Mounting
Products are dispatched, either individually, or as part of a panel/rack assembly.
If loose products are to be assembled into a scheme, then construction details can be
found in Publication R7012. If an MMLG test block is to be included it should be
positioned at the right hand side of the assembly (viewed from the front). Modules should
remain protected by their metal case during assembly into a panel or rack. The design of
the relay is such that the fixing holes are accessible without removal of the cover. For
individually mounted units, an outline diagram is normally supplied showing the panel cut-
outs and hole centres. These dimensions will also be found in Publication R6520.
2.4 Unpacking
Care must be taken when unpacking and installing the products so that none of the parts
are damaged, or the settings altered and they must only be handled by skilled persons.
The installation should be clean, dry and reasonably free from dust and excessive
vibration. The site should be well lit to facilitate inspection. Modules that have been
removed from their cases should not be left in situations where they are exposed to dust
or damp. This particularly applies to installations which are being carried out at the same
time as construction work.
2.5 Storage
If products are not to be installed immediately upon receipt they should be stored in a
place free from dust and moisture in their original cartons. Where de-humidifier bags
have been included in the packing they should be retained. The action of the de-
humidifier crystals will be impaired if the bag has been exposed to ambient conditions
and may be restored by gently heating the bag for about an hour, prior to replacing it in
the carton.
Dust which collects on a carton may, on subsequent unpacking, find its way into the
product; in damp conditions the carton and packing may become impregnated with
moisture and the de-humidifier will lose its efficiency.
Storage temperature –25°C to +70°C.
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