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2920 Float & Tape Transmitter 2 Installation
10 Installation and Operations Manual
Properly seal all ports to prevent moisture or other contamination from entering the wiring
compartment.
Water and Dust Ingress Protection
The enclosure and junction boxes have been designed and tested to IP66 and NEMA 4 for
water and dust ingress. To ensure that the unit is protected against water and dust ingress and
that the explosion proof/flame proof integrity of the enclosure is not compromised, ensure
the following:
1. Cover o-rings are installed, undamaged, and properly seated (see below) prior to
tightening. See the Correct Sealing of the Junction Box Covers section below for an illus-
tration and an explanation.
2. The plastic shipping conduit entry plugs are discarded and replaced by the metal,
explosion proof/flameproof plugs that were provided with the transmitter.
3. Conduit seals are installed per the local code. Varec recommends that a potting
compound be used that will not absorb water. Varec also recommends a drain on verti-
cal conduit runs with an explosion proof/flameproof flame arrestor.
4. Seal all pipe threads (e.g., conduit and plugs) with pipe sealant or Teflon tape.
5. The cover set screws are backed out enough to allow the covers to be fully tight-
ened and the covers are fully tightened. The covers may be locked, if desired, with the
set screws after the covers are tight.