Specifications
Specification Value
MH Fluid Cooler —
Specifications: Base
13
8.2 Coil air-inlet louvers shall be a minimum
of 0'-5" air travel, triple-pass PVC to limit
water splash out and prevent direct sun-
light from entering the collection basin.
PVC louvers shall be easily removable for
access to the coil(s). Louvers with less
than three changes in air direction are
unacceptable.
8.3 Drift eliminators shall be heavy duty PVC
with a minimum of three changes in air
direction, and shall limit drift losses to
0.005% or less of the design recirculating
water flow rate.
9.0 Distribution Basins:
9.1 An open basin above the fill with remov-
able interchangeable polypropylene
nozzles installed in the floor of the basin
shall provide full coverage of the fill by
gravity flow. Basin shall be installed and
sealed at the factory and assembled with
bolted connections. Tap screws shall not
be allowed. The basins shall be equipped
with removable, galvanized steel cov-
ers capable of withstanding the loads
described in paragraph 5.1. The water
distribution system shall be accessible
and maintainable during fan and water
operation.
9.2 A redistribution basin below the fill with
polypropylene nozzles installed in the floor
of the basin shall provide full coverage of
the coil at a flow rate sufficient to ensure
complete wetting of the coil during
operation. The basin shall be installed and
sealed at the factory and assembled with
bolted connections. Tap screws shall not
be allowed.
10.0 Casing, Fan Deck and Fan Guard:
10.1 The casing and fan deck shall be heavy
gauge G-235 galvanized steel panels.
The top of the fan cylinder(s) shall be
equipped with a conical, non-sagging,
removable fan guard, fabricated of welded
5/16" and 7 gauge rods and hot-dip gal-
vanized after fabrication.
■ Drift rate varies with design water load-
ing and air rate, as well as drift eliminator
depth and number of directional chang-
es. A drift rate of 0.001% is readily avail-
able on many standard models. If a lower
rate is required, please discuss with your
Marley sales representative.
■ Gravity-flow distribution basins are a feature of the MH
Fluid Cooler resulting in operating pump heads less than that encoun-
tered in fluid coolers with pressurized spray systems. Also, these basins are out
where they can be easily inspected—even maintained—while the fluid cooler is
in operation. Pressurized spray systems used by others are extremely awkward
to access and maintain.
■ Manufacturers who use materials other than heavy-gauge steel for fan decks
may be unable to meet your specified loading requirements. Fan decks on the
larger models—MHF706 and MHF707—are designed to be used as a working
platform.
(44 paginas)
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