Honeywell MILLER MIGHTYLITE+ MML-OGC1 User Manual page 11

WARNING
Always ensure that the plunger pin
has returned completely into the
locked position when changing the
unit from retractable to retrieval
mode. Do not use the unit if it will not
hold the load while in retrieval mode.
Proper precautions should always be
taken to remove any obstructions, debris,
material, or other recognized hazards from
the work area that could cause injuries or
interfere with the operation of the system.
The authorized person/user shall have
a rescue plan and the means at hand to
implement it when using this equipment.
The Fall Protection rescue plan in place
shall include methods on how to receive
the individual when retrived to upper
elevation that can include but is not
limited to clearance between the subject
and the retrival system, head protection
PPE and rescue equipment suitable to the
application.
5.2 Self-Retracting Lifelines
Operation of MightEvac
To return the unit to the retractable mode,
remove the weight from the lifeline and
secure the end of the lifeline as it will
begin to retract once the internal gears
are disengaged. Pull out on the plunger
pin and hold. Push inward on the ratchet
handle, where it connects to the gear
shaft, to disengage the gears and return
to retractable mode pull the plunger pin
(see Fig. P).
6.0 Calculating
Fall Clearance Distance
It is essential to understand how to
calculate the fall clearance distance
required for each work application to
avoid contact with a lower level.
The basic calculation shown below and
the related diagrams on page 42 - 43
may be used to determine Required Fall
Clearance when using a Self-Retracting
Lifelines in an overhead application. Refer
also to Table 1: Minimum Required Fall
Clearances.
SELF-RETRACTING LIFELINES
FALL CLEARANCE CALCULATION
(See Fig. Q1-EN)
[Calculation taken from work level]
Maximum Arrest Distance (MAD)
+ [Non-Standing Work Position Factor
(NSF)]
+ [Swing Fall Factor (SFF)]
+ 3 ft (0.9 m) Safety Factor (SF)
= Required Fall Clearance (RFC)
CAUTION: Read all notes and refer
to all Self-Retracting Lifelines fall
clearance diagrams and labels to de-
termine exact required fall clearance
for your application.
IMPORTANT NOTES:
Self-Retracting
anchored overhead
accuracy of the fall clearance calculation
and related information.
It is important to understand that other
factors, such as whether the user is
performing work in a standing, crouched
or lying down position and/or whether
the user is working directly below the
anchor point or at an angle, can affect fall
distance when using a retractable device.
The Self-Retracting Lifelines fall clearance
calculation assumes the user is standing.
If the user will be performing work in
a crouched or kneeling position, an
additional 3 ft (0,9m) of fall clearance is
required (see Fig. Q2). If the user will be
performing work in a lying down position,
an additional 5 ft (1.5 m) of fall clearance
is required.
The Self-Retracting Lifelines fall clearance
calculation also assumes the user is
working directly below the anchor point,
minimizing any possibility for a swing
fall. In a swing fall situation, the total fall
distance will be greater than if the user
were working directly below the anchor
point (see Fig. Q3).
In some applications, it may not be
possible to work directly below the
anchor point. In such a case, the worker
must increase the fall clearance distance
to account for the swing fall factor. In any
case, the worker must not be exposed to
a potential swing fall where contact with
another object may occur (see Fig. Q4).
11
Lifelines must
to ensure
be
the