GILBARCO VEEDER-ROOT Encore 300 Series, Руководство по установке

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Reference Information
Page 76 MDE-3985L Encore® Installation Manual · May 2006
Sealing ‘Y’ Fittings
‘Y’ seals are installed in conduit runs to minimize passage of vapors, gases or flames from one
portion of the electrical installation to another through the conduit. Fittings must be installed in
accordance with Articles 501-5 and 502-5 of the National Electric Code and fitting
manufacturers’ instructions.
Gilbarco uses Killark
Type EY fittings and recommends them or their equivalent for vertical
conduit runs. The following sealing directions are for Killark fittings only, and instructions
may vary for other manufacturer’s fittings. Read and understand all instructions completely
before beginning.
1
Remove close-up plug ( Figure 4-4 ).
Figure 4-4: Typical ‘Y’ Sealing
2
Separate conductors and fill conduit in and around conductors using Killark type “PF” packing
fiber to make a floor dam to hold fluid sealing compound.
Note: Floor dam must be even with the conduit stop in the lower hub of fitting. Use care so as
not to damage conductor insulation. Force packing between conductors and hubs,
pushing any shreds of packing fiber away from conductors to prevent leakage path.
3 Use only Killark Type “SC” sealing compound with Killark fittings, and do the following:
• Use a clean mixing vessel for every batch of sealant.
• Mix compound at the rate of 3 parts compound to 1 part water by volume.
• Sprinkle compound in water while stirring, until thick paste is formed.
• Do not mix more compound than can be used in fifteen minutes.
• Continue mixing for at least 3 minutes, until consistency is just fluid enough to pour slowly,
like thick gravy (not watery).
4
Slowly pour fluid compound into sealing fitting to level of bottom of threads for close-up plug.
Note: Be careful to pour slowly to avoid trapping air bubbles in seal.
5
Immediately wipe off any spilled compound and close seal with close-up plug.
Note:
Initial setting of sealing compound will occur within 30 minutes. Compound requires a
minimum of eight hours above 32 degrees F to develop sufficient strength to withstand
explosion pressures.
Conduit Wires
Close-up plug
Sealing compound
Fill to bottom
of threads
Floor dam
Conduit