SPX Cooling Technologies Marley Aquatower - Manual (Page 10)

10
/ Options /
200V Motor
Vertical
Discharge
Hood
Available for 1 hp thru 7.5 hp. Models
490B thru 496B
This option is available on Models 494A
and larger. It provides vertical discharge
of the air leaving the tower. Hoods are
galvanized steel. They ship separately
for installation by others. A large ac-
cess door provides entry to the fan and
mechanical equipment.
For use in restrictive enclosures or other
site situations where horizontal discharge
is not desirable. CTI Certification does
not apply when this option is selected.
Standard heater components consist of
3 or 5 kW, 3 phase, 460 volt, shielded
immersion heater; solid state circuitry
for cut-off at low water level or high
temperature; a control probe to monitor
basin water temperature and water level;
and a magnetic contactor all housed in
a weatherproof enclosure. Components
are shipped separately for installation
and wiring by others. Designed to
prevent sump freezing during shutdown
periods in winter operation. Unnecessary
if you use an indoor tank. Special heater
characteristics result in extended lead
times.
Component
Basin Heaters
Pre-assembled
Basin Heaters
Tank-type submersible heaters are
available for all models. No tower
modifications are necessary and heater
includes a 6-foot electrical cord with
grounded 3-prong plug for connection
to a standard 120V source. One or more
1.5 kW elements provide protection at
most ambient conditions. The built-in
thermostat maintains 40°F water while
the built-in safety switch shuts off power
if the heater element is not submerged.
All Aquatower models are available
with stainless steel structure. Or you
can choose a galvanized tower with
a stainless steel cold water collection
basin. Your Marley sales representative
can help you choose the amount of
corrosion resistance necessary for your
installation.
Stainless Steel
Construction
Special Motors Two-speed, one-wind, 460 volt, 60 cycle,
3 phase, TEFC motors are available for
Models 494C thru 496B
Field Assembly Where unique space restrictions or
rigging conditions demand, Aquatowers
can be shipped ready for field assembly
by others. Complete step-by-step
assembly instructions are provided.
Factory-installed control center in NEMA
3R enclosure mounted on tower casing.
Complete with thermostat controller for
single or two-speed motors to maintain
chosen cold water temperature.
Control System
Option Description Option Description