Section VI – Completing the Installation
MN06135 Issue/Rev. 1.3 (6/17) 86
Completing the Installation
E
xplosion-proof housing closure
W
hen securing the front cover of the AccuLoad model or QT, use the following procedure to ensure the unit is
properly sealed and is safe to operate in a Div. 1/Zone 1 environment:
1. I
nspect the door seal O-ring for damage and replace if damaged. The O-ring is not required to maintain
the explosion-proof rating, however, it is required to maintain the IP 65 ingress protection rating. Grease
cover flange with petroleum jelly or TechnipFMC grease (P/N 644886401) before attachment of the cover
to the housing.
2. Verify the mating areas between the front cover and the main housing are not scratched, corroded or oth-
erwise damaged such that the surface contact between them would be compromised.
3. Close the cover and tighten the cap screws around the perimeter of the front cover using the sequence
shown below. The final torque should be 20 FT-LB / 240 IN-LB (27.1 Nm / 276.4 Kg.cm). Be sure to note
the locations for the two longer bolts used for the security seal wire.
4. Check that the enclosure is properly sealed by verifying the cover to enclosure joint “gap” with a 0.0015"
(0.0381mm) feeler gauge. The feeler gauge must not enter the joint for more than a ¼" (6mm) at any
point around the perimeter of the cover to housing joint; see Figure 67 for example.
F
igure 65. Cover bolt torque pattern for AccuLoad III S
F
igure 66. Cover bolt torque pattern for AccuLoad III Q
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