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■ Fill/Louvers/Drift Eliminators
Marley high-performance lm ll is the heart of every Class
160 tower. A repeating chevron pattern provides the wetted
surface and air turbulence necessary for proper heat transfer,
while minimizing resistance to airow so you’ll save on fan
power. Molded protrusions on each ll sheet assure uniform
spacing.
Fill sheets are vacuum formed 15 mil (.015″) thick
PVC (polyvinyl chloride) capable of service at hot water
temperatures up to 120°F. Consult your Marley sales
representative for applications where hot water temperatures
are greater than 120°F yet less than 145°F to determine
upgrade possibilities. Stainless steel structural tubes resting in
stainless steel hangers support the ll, and PVC tubes control
alignment. This system also holds the bottom of the ll sheets
above the cold water basin oor to simplify basin cleaning.
Fill sheets include both louvers and drift eliminators. The
louvers in this patented arrangement keep water on the
ll sheets and in your tower, and also assure proper heat
transfer throughout wide variations in airow. Users nd this ll
operates ice-free even in extremely cold weather.
Integral drift eliminators prevent the costly nuisance of
drift spotting on objects in the sur round ing environment.
Their unique shape induces the air ow through three distinct
direction changes as shown below. The nal turn directs air
toward the fan to save you fan horsepower. Moisture carried
in the air stream can’t make these abrupt turns, so drift is less
than 0.005% of the circulating water ow rate.
■ Mechanical Equipment
The Marley Geareducer speed reducer used in the Class
160 line contributes a long record of dependability, long service
life, and low maintenance. Their designs meet or exceed the
requirements of CTI STD-111 and AGMA Std. 420.04. We run-
in every Geareducer unit under load prior to shipment to make
sure that it will operate properly on your tower.
Housings are gray cast iron. Gears are high-strength,
case hardened alloy steel. And all bearings are tapered roller
bearings. A variety of available horsepower capacities and
reduction ratios lets us choose the optimum Geareducer model
and fan speed for your job. Service factors are always at least
2.0 as applied.
Splash-type lubrication and integral cooling ns preclude
the need for maintenance-intensive oil pumps and coolers. A
constant oil bath or ow lubricates every bearing in forward or
reverse motion—at full or half speed.
All Marley Geareducer assemblies are rightangle type with
motors located outside the tower’s saturated airstream.
A galvanized steel lube line runs from the Geareducer unit to
a standpipe near the motor on each cell, so you can check oil
level and change or add oil while standing on the fan deck.