SPX Cooling Technologies Recold JT Series - Manual (Page 4)

Recold / JT Series Cooling Tower / Accessories
4
CAPACITY CONTROLS
Dual Fan Motors—The dual fan motor package is available
as a proven energy saving capacity control option. It
consists of furnishing a high efficiency motor, a 1200 RPM,
low speed motor, two sets of drives and belts, extended
fan shaft and motor bases on opposite sides of the blower.
A UL control-starter panel is available as a completely wired
package for one point connection.
Variable Speed Drive—A Variable Speed Drive
automatically minimize the tower’s noise level during
periods of reduced load and/or reduced ambient
temperature without sacrificing the system’s ability to
maintain a constant cold water temperature. This is a
relatively inexpensive solution, and can pay for itself quickly
in reduced energy costs.
Electric Damper Controls—An electric damper control
package is available as an accessory for modulating the
internal damper system. A proportional solid state actuator
is factory mounted below the fan scroll and attached to
the damper shaft by connecting linkage. A sensing bulb
connected to the actuator by a capillary tube is normally
mounted in the unit pan water basin for monitoring the
system. However, when specified, a pressure control may
be supplied for field mounting to allow direct head pressure
control. An end switch located inside the motor actuator
may be adjusted to cycle the fan motor on for pressure rise
and off when dampers close.
CASING INSULATION
In order to further reduce the heat loss from the unit
coil, factory installed insulation on exterior coil panels
is available. A protective coat of paint is applied to the
insulation for protection from the weather elements.
CONTROL – STARTER PANEL
Contains the fan motor starter, disconnect switch,
thermostat sensing the cold water temperature to control
the fan motor and control transformer when required by the
supply power characteristics. All components are contained
in a NEMA 12 enclosure with UL label and mounted on the
unit. Fan motor and controls are factory wired to the panel
to provide single point connection for users power supply.
Panels for dual fan-motor arrangement include elapsed
time meters for both motors to aid in determining energy
savings. NEMA 3R and 4 enclosures are also available.
VIBRATION ISOLATORS
Spring type vibration isolator rails may be supplied for field
installation—some units will require base frame structural
support.
ELECTRONIC WATER LEVEL CONTROL
The electronic water level control package provides a
constant and accurate means of monitoring water level in
the unit. For this reason, it is often recommended for those
installations which require year round operation in low
ambient conditions.
The complete package includes an electric float switch with
stilling chamber which is factory installed in the pan section
of the unit. An electric solenoid valve for water make-up
is shipped loose for remote installation. All wiring must be
provided in the field by others.
PAN HEATER
The use of a remote sump tank located indoors is
a common form of pan water freeze protection for
evaporative cooling equipment. However, for those
installations which will not allow this type of system, freeze
protection may be provided by electric immersion heaters or
steam or hot water coils installed in the pan.
The electric heater package consists of immersion
heaters installed in the pan to provide efficient even
heat distribution. Standard heaters are selected to
provide approximately 40°F pan water at -10°F ambient
temperature. A low water cutout switch is supplied to
prevent heater operation when the elements are not
completely submerged. The heaters are monitored by a
sump thermostat with remote sensing bulb located in the
pan water. All heaters and controls are factory installed for
field wiring by others.
NOTE: Pan heater packages are designed to prevent
pan water freezing during unit shutdown with fans and
pump idle.
STAINLESS STEEL CONSTRUCTION
In addition to the standard stainless steel basin, fill supports
and access doors, 300 stainless steel construction is
offered as an option for upper casing panels.
RECOLD PRODUCTS
550 W MERCURY LANE
BREA, CALIFORNIA 92821
UNITED STATES
704 529 6080
[email protected]
spxcooling.com
In the interest of technological progress,
all products are subject to design and/or
material change without notice.
©2008 SPX Cooling Technologies, Inc.
Printed in USA | RECOLD JT-TECH-07A