Sterling ME - Manual (Page 4)

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The open end of piping systems being
purged shall not discharge into areas where there are
sources of ignition or into confi ned spaces UNLESS
precautions are taken as follows: (1) By ventilation of
the space, (2) control of purging rate, (3) elimination
of all hazardous conditions. All precautions must be
taken to perform this operation in a safe manner!
LOCATIONS TO AVOID
Unit heaters should not be installed within corrosive or
fl ammable atmospheres. Do not locate any gas fi red
heater where air for combustion contains chlorinated
vapors or acid fumes. Avoid locations where extreme
drafts can affect burner operation.
Presence of these air impurities can
cause premature failure of the heat exchanger and
void the warranty (See limited warranty on page 24).
The venting system must be installed in accordance with
heater manufacturer’s instructions. The venting system
is an integral part of the unit and must not be altered
in the fi eld!
RIGGING
Rig unit using either belt or cable slings. Use spreader bars
to protect the top of the unit when it is lifted. See Figures 1
and 2. Make sure all hardware used in the lifting/mounting
process is tightened and secured.
On units with a total length of less than 104" (2642mm),
excluding evaporative cooler, two holes are provided in
the base rail on each side of the unit. Slide pipes beneath
the unit through these holes and attach rigging to pipes
for lifting the unit.
On units with a total length of a 104" (2642mm) or greater,
excluding evaporative cooler, lifting lugs/brackets attached
to the base rail are provided. Once the unit is set in place
these lifting brackets may be removed if required.
Attach rigging to lugs/brackets for lifting the unit. For distance
between lifting lugs/brackets and total unit lengths, refer
to the Dimensional Data section of this manual. Also see
Center of Gravity and Weights sections in this manual prior
to lifting and apply accordingly to the lifting process.
Figure 1 - Hoisting of Make-Up Air Unit
Without Lifting Brackets
Figure 2 - Hoisting of Make-Up Air Unit
With Lifting Brackets