Recold JT Series Cooling Tower /
/
Recold / JT Series Cooling Tower
Recold, the pioneer of Dri-Fan forced draft evaporative coolers, now applies this principal to the cooling of process water.
With the fan in the supply air stream, away from the high humidity air leaving the tower, the fan shaft and bearing are
assured longer life.
Construction
/
2
SYSTEM
The process water enters the spray tree at the top of the
unit, is sprayed down onto the heat exchanger surface
or “fill”, giving up heat to the counterflowing air before
returning to the system from the sump pan. Moist air does
not enter the fan assembly, resulting in longer life and
fewer service problems.
HYDROSPRAY NOZZLES
Hydrospray nozzles are made of non-ferrous material,
sized and spaced for optimum wetting of fill. The even
distribution of spray across the fill material is extremely
important in evaporative equipment.
ACCESSIBILITY
Recold cooling towers are designed for maximum
accessibility for inspection and cleaning. Recold patented
access doors on both sides of the unit provide ample
access to the spray nozzles, fill, eliminators, bleeds and
sump pan for service and maintenance. Recold access
doors provide a complete air and water tight seal without
gaskets or fasteners, and are “quick opening.”
CONSTRUCTION
Recold cooling towers are constructed of 300 series
stainless steel (basin, fill supports and access doors) and
heavy gauge hot dipped G-235 galvanized steel per ASTM
A-525.
BLOWERS
A single, slow-speed forward curve blower is used for
optimum efficiency and minimum noise. Each blower
is balanced to eliminate unit vibration on Recold’s high
precision electronic balancing equipment. Large blowers
are made from galvanized steel and subject to careful
quality control throughout. Fan shafts are coated to prevent
corrosion. The blower drives are selected at 150% of rated
brake horsepower.
Bearings are self-aligning, ball-bearing type, with external
lubricating fittings and selected for 2000,000 hour average
bearing life. Rugged, OSHA approved, belt guard and
screen are provided for protection. Motor is mounted on an
adjustable base.
INTEGRATED ASSEMBLY
Recold cooling towers are completely assembled at the
factory and shipped as a unit.
FILL
High efficiency is accomplished by using a PVC fill design
that provides the maximum amount of wetted surface
within allowable airside pressure drop. Fill is conveniently
sized for easy removal. The cooling tower fill shall be high
efficiency, self-extinguishing PVC, a minimum of 40 mils
thick. It shall have a flame spread rating of 25 per ASTM
standard E-84 and be impervious to rot, decay, fungus or
biological attack.
DRIFT ELIMINATORS
Eliminators are constructed of PVC assembled in
removable, easy to handle sections. A three-pass design
allows three changes in air flow resulting in decreased drift
rates. The use of durable PVC eliminates the corrosion
problems associated with galvanized eliminators.
TESTING
All Recold cooling towers are tested under the close
supervision of the Quality Control Department before being
released for shipment. Fans are run and spray systems
operated to assure quiet, balanced operation without leaks,
water carryover or vibration. Nozzles are checked for proper
distribution.
Use this data for preliminary layouts only. Obtain
current drawing from your Marley/Recold sales
representative.
The UPDATE web-based selection software—available
at spxcooling.com—provides JT Series model
recommendations based on customer's specific design
requirements.
Recold / JC Series Cooling Tower
A
B
R
C
K
H
D
J
12" 2"
DRAIN AND
OVERFLOW
EXTERNAL
FLOAT BOX
SPRAY HEADER
CLEANOUT
12"
MAKEUP
INLET
OUTLET
ELIMINATOR
ACCESS
ACCESS
DOOR
2" LIFTING
HOLE (4)
7
/8" MOUNTING
HOLE (6)
Schematic
/
3
Access Doors
Model
A B C
JT1830 80 76 31 84 — 6 53 61
JT2140 96 76 37 102 — 6 65 61 1 1 — — 64
JT2550 - JT2565 115
JT3175 - JT3185 139
JT31100 139
JT37110 - JT37130 172
JT37140 172
JT40160 - JT40180 184
JT40215 - JT40240 208 98
JT40265 208 98
JT49290 - JT49310 221 118
JT49340 - JT49360 245
JT49390 - JT49415 268 118
3
⁄4 77 451⁄4 124 511⁄4 6 763⁄4 65 1 1 1 1 95
1
⁄2 801⁄4 551⁄2 144 51 6 92 67 1 1 1 1 163
1
⁄2 801⁄4 551⁄2 144 51 6 92 67 1 1 1 1 163
1
⁄4 921⁄2 667⁄8 1801⁄4 713⁄4 6 115 71 2 1 2 1 248
1
⁄4 921⁄2 667⁄8 1801⁄4 713⁄4 6 115 71 2 1 2 1 248
1
⁄4 981⁄2 931⁄4 192 841⁄2 8 115 78 2 1 2 1 note 1 374
1
⁄2 1181⁄2 1001⁄2 248 104 10 1641⁄2 102 2 2 2 2 note 1 880
1
⁄2 933⁄8 217 961⁄2 8 1391⁄4 78 2 1 2 1 note 1 454
1
⁄2 933⁄8 217 961⁄2 8 1391⁄4 78 2 1 2 1 note 1 454
1
⁄2 1001⁄2 225 80 10 1391⁄2 102 2 2 2 2 note 1 748
1
⁄2 1001⁄2 273 128 10 188 102 2 2 2 2 note 1 1012
Dimensions inches
note 2 D H J K R Top Bottom Top Bottom
1
⁄4 1 1 — — 43
Far Side Near Side
Note
1 An additional bottom access door is installed on inlet
connection end.
4. Water level at top of overflow stand pipe
5 Discharge duct flange is C minus 3" and K minus 3".
2 Overall width of unit at base rail is C plus 1".
3 Maximum overall height at blower (fan) section is 118".
Sump
gallons
note 4
Model JT 1830 2140 2550 2565 3175 3185 31100 37100 37130 37140 40160 40180 40215 40240 40265 49290 49310 49340 49360 49390 49415
Nominal Tons
†
Supply FPT
Drain FPT
Inlet MPT
Outlet MPT
Fan Diamter
Fan RPM
Fan CFM
Motor hp* (0"=
Motor Frame
Shipping Weight lb
1
Operating Weight lb**
† Nominal tons are based upon 95°F HW, 85°F CW, 78°F WB and 3
GPM/ton. The UPDATE web-based selection software provides JT model
recommendations based on specific design requirements.
26 36 47 57 73 83 92 113 130 142 164 178 195 212 232 264 280 300 325 340 364
1
⁄21⁄21⁄21⁄23⁄43⁄43⁄4 1 1 1 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4
3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 5 5 5 5 5 5
1
2
⁄2 3 3 4 4 4 (2) 3 (2) 4 (2) 4 (2) 4 (2) 4 (2) 4 (2) 4 (2) 4 (2) 4 (2) 5 (2) 5 (2) 5 (2) 6 (2) 6 (2) 6
4 4 6 6 6 6 6 6 6 6 6 6 6 6 6 8 8 8 8 8 8
18 21 25 25 31 31 31 37 37 37 40 40 40 40 40 49 49 49 49 49 49
625 600 430 500 350 400 462 360 410 445 385 415 385 415 430 243 267 246 271 253 278
5880 8060 10800 13300 15700 17100 20200 24000 27300 29700 39100 42500 45100 47200 50300 55500 61000 64500 71000 74200 84500
⁄4" SP)
2 3 3 5 5 7.5 10 10 15 20 20 25 20 25 30 25 30 30 40 40 50
145T 182T 184T 184T 213T 215T 215T 254T 254T 256T 284T 256T 284T 286T 284T 284T 286T 286T 324T 324T 326T
853 1142 1597 1616 2504 2528 2557 3906 3943 3988 5133 5194 5579 5675 5709 7886 7916 8486 8624 8978 9028
1210 1675 2390 2410 3870 3900 3915 5980 6010 6060 8250 8310 9365 9460 9500 14120 14150 15820 16000 17410 17460
* For static pressure from
** At normal operating water level in cold water basin.
Note: All piping connections are for standard GPM. Consult Recold for other
1
⁄4" to 1⁄2" ESP, use next size larger motor.
flow rates.
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
spxcooling@spx.com
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
Loading...