INDELAC CONTROLS NEMA 4, Руководство по сборке, установке, эксплуатации и обслуживанию

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Electric Fail-Safe Device Installation, Operation & Maintenance Manual, 3A
Page 15
NEMA 7 ENCLOSURE, GENERAL:
In general, operation and maintenance of a NEMA 7 Fail-Safe Device is no different than that of a NEMA 4
Unit. However, there are some precautions that must be followed.
1) DO NOT install in ambient temperatures that exceed 140 degrees F .
2) DO NOT under any circumstances remove the Fail-Safe cover while in a hazardous location when
the contacts are still live; this could cause ignition of hazardous atmospheres.
3) DO NOT under any circumstances use a NEMA 7 Fail-Safe Device in a hazardous location that
does not meet the specifications for which the Unit was designed . The Fail-Safe Device is clearly
tagged with the NEMA classification it was designed for.
4) When removing the cover, care must be taken not to scratch, scar or deform the flame path of the
cover or base of the Fail-Safe Device. This will negate the NEMA 7 rating of the enclosure.
5) When replacing the cover on a Fail-Safe Device, take care that the gasket is in place to assure the
proper clearance after the cover is secured. After securing the cover screws check the clearance
between the cover and the base - a .002” thick by 1/2” wide feeler gauge may not enter between the
two mating faces more than .125”.
6) All electrical connections must be to State and Local Codes and in accordance with the
specifications for which the unit is being used.
7) If the Unit has an internal heater, wait at least 45 minutes after removing power from the NEMA 7
Fail-Safe Device for cooling, before removing the cover.
*In the event maintenance is required, remove the Fail-Safe Device from the hazardous location
before attempting to work on it.
MANUAL REVISIONS
OCT 20,
2021 INITIAL RELEASE.