Gasboy Atlas Fuel Systems Installation Manual - Manual (Page 69)

MDE-4331M Atlas® Fuel Systems Installation Manual · September 2014 Page 7-7
Wiring Reference Information
CPU Switch Settings
For CPU switch settings, refer to the latest version of MDE-4363 Atlas Fuel Systems Owner’s
Manual.
Sealing ‘Y’ Fittings
‘Y’ seals installed in a conduit run to minimize the passage of vapors, gases, or flames from
one portion of the electrical installation to another through the conduit. Fittings must be
installed as per articles 501-5 and 502-5 of the NEC and the manufacturer’s instructions.
Gasboy uses Killark type EY fittings and recommends them or their equivalent for vertical
conduit runs. Following sealing directions are for Killark fittings only, and instructions may
vary for other manufacturer’s fittings. Read through all instructions completely before you
begin.
1 Remove the close-up plug (see Figure 7-3 ).
Figure 7-3: Typical ‘Y’ Sealing
Conduit Wires
Close-up Plug
Sealing
Compound
Fill to the
Bottom of
Threads
Floor Dam
Conduit
2 Separate the conductors and fill the conduit in and around the conductors using Killark type
“PF” packing fiber to make a floor dam to hold the fluid-sealing compound.
Note: The floor dam must be even with the conduit stop in the lower hub of the fitting. Ensure
that you do not damage the conductor insulation. Force pack between conductors and
hubs and push any shreds of packing fiber away from conductors to block the leakage
path.
3 Use only Killark type “SC” sealing compound with Killark fittings, and perform the
following:
• Use a clean mixing vessel for every batch of sealant.
• Mix the compound at a rate of three parts compound to one part water by volume.
• Sprinkle the compound in water while stirring, until a thick paste is formed.
• Do not mix more compound than what can be used in 15 minutes.
• Continue mixing for at least three minutes, until the consistency is just fluid enough to
pour slowly.