Wiegmann has always recognized
that our customers in the electrical
and electronic marketplace need reliable, high quality enclosures and
environmental control products to
meet their protection requirements.
Protection Requirements today not
only mandate NEMA TYPE 12, 3R, 4,
& 4X, but also require a broad mix of
BTU & size selections. Wiegmann is
proud to offer those choices via a
whole new line of A/C products. They
are: Advantage Series, Trim Line
Series, Micro-Mini Series, Integrity
Series, and the Top Mount Series.
Three Basic Cooling Methods
When selecting a cooling method
there are three types to consider.
1 Passive Ventilation — If there is
only a minimal heat gain in your
circumstance, use of louvers or
grilles with filters can be effective.
This method, however, usually provides less cooling effect than is
necessary with today’s components.
2 Forced Convection Air Cooling —
If the installation will be in a clean,
non-hazardous environment with
an acceptable ambient (outside the
enclosure) temperature range, a
simple forced-air cooling system
utilizing outside air is usually adequate. Combined with an air filter,
such devices generally meet the
heat removal needs of typical electronic equipment and many electrical applications (Fig. 1). Examples
of forced convection air cooling are
filtered fans, fan trays, and blowers
of various types.
FIGURE 1 — Forced Convection Method
Filter & Grille
Required
Ambient Air
with Heat
Load
3 Closed-Loop Cooling —Inharsh
environments involving high temperatures, wash-down requirements,
heavy particulate matter or the
presence of chemicals capable of
damaging components (NEMA 4 or
12 environments), ambient air must
be kept out of the enclosure. Closedloop cooling consists of two separate circulation systems. One system, sealed against the ambient air,
cools and recirculates the clean
cool air throughout the enclosure.
The second system uses ambient air
or water to remove and discharge
the heat. Examples of closed-loop
cooling equipment employed with
electronics and process controls
are heat exchangers and air
conditioners.
Fan or Blower
with filter &
grille
Ambient
Air with
Heat Load
Ambient
Air
Fan or
Blower with
filter & grille
Pressurized System — pushes air through enclosure
Fans and Blowers can be used to pressurize (preferred) or exhaust cabinet air.
The ambient air should be filtered before it enters the cabinet.
Heated
Air
Cooled Air
In an air-to-air heat exchanger, heat from air surrounding the
electronics is removed by a specially designed heat transfer
element before being routed back into the enclosure.
Cabinet
FIGURE 2 - Closed Loop Cooling Method
Blower
Ambient Air
with Heat
Load
Ambient Air
Heat Exchanger
Blower
Ambient Air
Filter & Grille
Required
Cabinet
Exhaust System — pulls air through enclosure
Condenser
Heated
Air
Chilled
Air
In air conditioners, a condenser, an evaporator, and two blowers combine to chill the air circulating in the enclosure.
Ambient Air
with Heat
Load
Ambient Air
Blowers
Evaporator
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Data Subject To Change Without Notice
ENVIRONMENTAL CONTROLS
AIR CONDITIONERS-APPLICATION INFORMATION
K3
Cooling Control Cabinets
Most electrical & electronic control
systems generate a substantial
amount of heat during operation. This
heat factor is intensified as controls
are made more compact, perform
more functions, and are placed in more
confined areas. Additional problems
are encountered when the electronic
process control system is located onsite in an industrial setting, rather than
in a clean computer room. The factory
environment can be hostile to the
point that performance and effective
life of the electronic components are
materially reduced, or the control system fails completely. Ambient temperature might be excessively high, as
that found in a steel mill. Moistureladen air and air-borne particulate
matter might be present to adversely
affect the electronic components, as
in the paper manufacturing industry.
Air conditioners are designed to perform
reliably under many of these harsh
conditions and to provide the cooling
and environmental protection required
by sensitive electronic production
control systems.
Factors Affecting Model Selection
This selection is presented as a basic
outline or checklist of the various
conditions to be considered when
choosing a cooling unit for a certain
application. The following are factors
which must be considered when
selecting a cooling unit:
Internal Heat Load — This is the heat
dissipated by the electronic controls.
It is expressed in watts. One watt
equals 3.413 BTU/HR. Thus, to obtain
the approximate cooling capacity
required to remove a specific heat load,
the following formula can be used:
Watts x 3.413 = BTU/HR
For example, a heat load of 800 watts
requires an air conditioner capable of
removing at least 2,730 BTU/HR.
Resistance to Air Flow in the
Enclosure
Air Flow is measured in cubic feet per
minute (CFM). To create an air flow of
any desired velocity requires that
pressure be produced by the blower
in the air conditioner. Resistance to this
blower-produced air flow is created by
obstruction within the cabinet in the
air flow path. The resistance itself is
called pressure drop (P.D.) and is
measured in inches of water column.
The effect of significant restrictions in
the cabinet air flow path are as follows:
The obstructions cause pressure drops,
which leads to cool air flow reduction.
This reduction in cool air flow will
decrease the effective capacity of the
cooling unit. When selecting the
proper cooling unit, allowance must
be made for pressure drop.
Heat Load From The Surroundings
Ambient conditions can cause a heat
gain in the enclosure. The rated
capacity of the cooling unit must be
sufficient to handle this heat gain.
When evaluating the additional heat
load gained from the surroundings,
the subject more or less breaks down
into two situations: (1) the cabinet is
insulated and well sealed, or (2) the
cabinet is not insulated (most cabinets
are uninsulated.)
(1) Cabinet Insulated — Normally, well
insulated cabinets will not gain sufficient ambient heat to affect air conditioner’s operation. Maximum operating
temperature for our air conditioners is
125°F. When the air conditioner operaties in ambient temperatures below
125°F, the cooling capacity of the air
conditioner substantially increases.
(2) Cabinet Not Insulated —
Obviously, this design placed more of
a burden on the cooling unit. Heat is
conducted to the cool side. Thus,
high ambient heat will be readily
transmitted into the cooler enclosure.
To determine the additional capacity
required of our air conditioner installed
in an uninsulated cabinet, the surface
square footage of the enclosure must be
Cooling And Control Cabinets
STEP ONE
1 Watt = 3.413 BTU/HR.
Determine the internal
heat load in Watts that
must be dissipated.
STEP TWO
1 m2 = 10.76 ft.2
Calculate the exposed
surface area of the
enclosure: 2(h’ x w’) +
2(h’ x d’) + (w’ x d’) =
Area (ft2)
calculated to obtain the total effective
heat transfer area. For this calculation, use the surface area of the
sides, plus the area of the top, and
omit the bottom area of the cabinet.
Air movement outside the uninsulated
cabinet will increase the heat conducted from the ambient into the enclosure.
When there is little or no air circulation
outside the cabinet, the layer of air
immediately adjacent to the exterior
cabinet walls acts as an insulating
film. Exterior air movement dissipates
this insulating layer of air in proportion
to the velocity of the air flow. Substantial
am-bient air circulation will increase
the transmitted heat load imposed on
the cooling unit.
If the cabinet being cooled is not air
tight, then high ambient relative humidity
will adversely affect the cooling effectiveness of the air conditioner. When
humid air infiltrates a poorly sealed
enclosure, the air conditioner is required
to use up valuable BTU/HR capacity
just to condense the moisture from the
internal air. Conversely, if the cabinet
is well sealed, high ambient relative
humidity, has very little effect on the
heat capacity of the air conditioner.
Steps For Sizing an Air Conditioner
Proper selection of an air conditioner
is determined by the following criteria:
• Mounting requirements (top or side
mounting options)
• Dimension of air conditioner and
enclosure
STEP THREE
1oC or 1oKΔT=1.8oF T
Determine the temperature differential by subtracting the maximum
allowable temperature
inside the enclosure
(Ti) from the maximum
ambient temperature
outside the enclosure
(To) To-Ti=ΔT
STEP FOUR
(Watts x 3.413) +
[1.25 x Area ft.2 x
ΔT(°F)]
=BTU/HR.
Capacity
Required BTU/HR.
Capacity Rating
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Data Subject To Change Without Notice
K4
ENVIRONMENTAL CONTROLS
M/TAB MOUNTING TEMPLATE AND ASSEMBLY
FEATURES-SPECIFICATIONS
Description
highlight of the Panel-Mounted
A
TrimLine Series is an easy, revolutionary
system for installing Panel-Mounted
Air Conditioners and Heat Exchangers
onto electronic or electrical enclosures.
The M/TAB is standard on all TrimLine
Air Conditioners. This integral system
functions as a mounting template,
pre-installation hanger and final
assembly bracket.
The M/TAB was specifically designed
to assist in the difficult job of installing
enclosure Air Conditioners. It simplifies
the installation process by eliminating
the problem of handling flangemounted Air Conditioners. The solution is provided by following these
installation steps...
• Use the M/TAB as a template to
drill holes for mounting to the
enclosure
• Bolt M/TAB to enclosure
• Cut out the Supply and Return
openings
• Hang the Air Conditioner or Heat
Exchanger on the M/TAB
• Secure the unit to the M/TAB
The M/TAB also allows for the quick
removal and transportation of the Air
Conditioner or Heat Exchanger, separate from the equipment, for servicing
or change to a different capacity
same-size Air Conditioner or to a
same-size Heat Exchanger.
Features
• No exposed rails or mounting
flanges; aesthetically pleasing
while conserving cabinet space
• Reduction in installation time and
labor, with significant cost savings
• Ease of installation and one piece
design reduce mounting errors
• Allows the installer to operate independently
• Functions as a pre-installation
hanger and final assembly bracket
• Installation is totally outside the
enclosure; no clumsy mounting
from inside the enclosure
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Data Subject To Change Without Notice
DATASUBJECTTOCHANGEWITHOUTNOTICE
ENVIRONMENTAL CONTROLS
INDOOR/OUTDOOR SIDE-MOUNTED AIR CONDITIONERS
FEATURES-SPECIFICATIONS
K5
NEMA
TYPE 3R & 12
MAINTAINED
Description
At last - air conditioners designed
specifically for cooling electronic
enclosures that can be used for both
indoor and outdoor applications right
out of the box!
No more bulky unattractive weatherhoods... No more worries over what
options to specify for outdoor
applications.
Expertly designed and crafted, the
ADVANTAGE Series boasts a stylish
appearance with rounded edges, no
visible hardware and a textured
baked powder finish to blend easily
with contemporary enclosure designs.
Serviceability has been made easier
by incorporating a “knock-down”
sheetmetal design which provides
quick access to internal components.
These air conditioners are available
in capcities from 2,000 to 22,000
BTU/H in seven heights, all utilizing
the exclusive M/TAB integral mounting system.
Features
• Capacities: 2,000 to 22,000 BTU/H
• Textured Beige Powder Finish
• Built-in Condensate Evaporator
• CFC-Free Refrigerant
• Closed-Loop Cooling
• Crankcase Compressor Heater
• Digital Temperature Display
• EMI/RFI Suppressor
• Head Pressure Control Switch
• Heavy-duty Steel Enclosure
• Low Temperature Control
Thermostat
• M/TAB Mounting System
• NEMA 3R and 12 Ratings
Maintained (UL50)
• Filters
• Six Foot [1.8m] (minimum) SJT
3-wire Cord
• UL/CUL Recognized
• Completelineofaccessories
RP17
2,000 BTU/H
17"H x 12"W x 11"D
RP28
3,000 BTU/H
28"H x 12"W x 11"D
RP33
4,000 BTU/H
33"H x 12"W x 11"D
RP36
6,000 BTU/H
36"H x 15"W x 11"D
RP47
8,000 & 12,000
BTU/H
47"H x 15"W x 13"D
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Data Subject To Change Without Notice
RP52
18,000 BTU/H
52"H x 17"W x 16"D
DATASUBJECTTOCHANGEWITHOUTNOTICE
RP55
22,000 BTU/H
55"H x 22"W x 17"D
K6
ENVIRONMENTAL CONTROLS
ADVANTAGE “RP17” SERIES AIR-COOLED
SIDE-MOUNTED AIR CONDITIONERS
12.35
[313.7]
2
NEMA
TYPE 3R & 12
MAINTAINED
FEATURES-SPECIFICATIONS
Standard Features
• Condensate Evaporator
• CFC-Free Refrigerant
• Crankcase Compressor Heater
• Digital Temperature Display
• EMI/RFI Suppressor
• Head Pressure Control Switch
• Filters
• Low Temperature Control Thermostat
• M/TAB Mounting System
• NEMA 3R & 12 Rating Maintained
• UL/CUL Recognized
‡
• Textured Beige Powder Finish
Accessories and Options
•
Cooling Effect Detector
• Enclosure Heater
• Filter Recoating Adhesive
• Filters for replacement
• Internal corrosion protection
• Painted Metal Grille
• Power Loss Delayed
Compressor Start
• Short Cycle Protector
• Special paint finishes
3
4
17 .50
[444.5]
PERFORMANCE CHART
WA4C2RP17R
4000
3500
3000
2500
2000
1500
1000
500
Cooling Capacity (BTU/H)
0
70
Operation within shaded area not
Operation within shaded area not
recommended.
recommended.
KA4C2RP17R
Maximum enclosure
air temperature ºF
80
90 100 110 120 130
Ambient Temperature (ºF)
17 .14
[435.4]
1
10.94
[277.8]
12 5
120
110
10 0
90
75
80
ADVANTAGE SERIES RP17 ADVANTAGE AIR-COOLED PANEL-MOUNTED AIR CONDITIONERS
Dimensions, inches [metric], are for reference only and subject to change.
‡
UL/CUL Recognized models are available as Listed at added cost.
12.5 0
[317.5]
4
3
12.5 0
[317.5]
13.16
[334.3]
7. 0 0
[177.8]
27.75
[704.9]
7. 7 5
[196.9]
47.25
[1200.2]
1. 8 4
[46.7]
(14) .281 [7.0]
DIA. HOLES
7. 0 0
[177.8]
TYP.
1. 4 3
[36.3]
3.13
[79.5]
1. 1 0
[27.9]
12.5 0
[317.5]
4
3
12.5 0
[317.5]
13.16
[334.3]
7. 0 0
[177.8]
27.75
[704.9]
7. 7 5
[196.9]
1. 8 4
[46.7]
47.25
[1200.2]
13.2 5
[336.6]
46.81
[1189.0]
UNIT MUST BE 4" [100mm]
MINIMUM ABOVE FLOOR
FOR FILTER ACCESS
15.3 5
[389.9]
2
1
www.hubbell-wiegmann.com
Data Subject To Change Without Notice
DATASUBJECTTOCHANGEWITHOUTNOTICE
FEATURES-SPECIFICATIONS
ENVIRONMENTAL CONTROLS
TRIMLINE SERIES AIR-COOLED
SIDE-MOUNTED AIR CONDITIONERS
NEMA
TYPE 12
MAINTAINED
K11
Description
Innovations in technology have resulted
in much denser components packaging and smaller available panel sizes
on which to mount Air Conditioners.
The TrimLine Series is the response to
these new packaging demands with
the Narrow 10", 12", 15" and 17" width
panel-mount air conditioners. In addition to being narrower than traditional
Air Conditioner units, the TrimLine
Series include the Condensate
Evaporator, Low Temperature Control
Thermostat and EMI/RFI Suppressor
as standard features and are available
in all popular voltages and frequencies.
The TrimLine Series consists of compact models in 2,000-2,500 BTU/H
capacities, mid-size models, 28", 33"
and 36" WITH up to 4,000, 5,000 and
6,000 BTU/H respectively and the fullsize model at 47" with 10,000 BTU/H.
Each model series is designed with a
minimum width to take up less cabinet
space on the exterior panel or door.
Integral to the TrimLine Series is the
M/TAB (Mounting Template and
Assembly Bracket) system which
makes installing Air Conditioners simple
and fast and interchangeable with corresponding TrimLine Heat Exchangers.
Outdoor or corrosive environments
require weather protection and/or
special internal and external protective features. For outdoor applications
see the Advantage and Integrity
Outdoor Series.
For extreme ambient temperatures
and/or severely contaminated environments, the use of TrimLine or other
Water-Cooled Air Conditioners are
recommended.
Features
• Capacities: 2,000 to 10,000 BTU/H;
six heights available
• CFC-free or Low ODP Refrigerant
• All models UL/CUL Listed or
Recognized
• Tested and approved by UL for
NEMA 12 Enclosures
• Compact design with slim 10",
12", 15" and 17" wide mounting
footprints
• Exclusive KOOLTRONIC M/TAB
integral mounting system for quick,
easy installation
• Built-in Condensate Evaporator
eliminates need for draining normal
condensate
• Thermostatic Low Temperature
Control prevents over-cooling and
provides energy-efficient operation
• EMI/RFI Suppressor minimizes transient line spikes during on/off cycling
• Field-reversible condenser outlet
blower provides choice of horizontal or vertical air discharge
• Heavy-duty steel enclosures with
gray baked powder finish
• Six foot (minimum) SJT 3-wire
power cord
• Complete line of accessories
NP17
2,000 BTU/H
17”H x 12”W x 9”D
Narrow-Mini
2,500 BTU/H
20”H x 10”W x 10”D
NP28
4,000 BTU/H
28”H x 11”W x 12”D
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Data Subject To Change Without Notice
NP33
4,000 BTU/H
33”H x 12”W x 9”D
NP36
4,000 & 6,000 BTU/H
36”H x 15”W x 12”D
DATASUBJECTTOCHANGEWITHOUTNOTICE
7,000, 8,000,
10,000 12,000
47”H x 15”W x 12”D
NP47
BTU/H
K12
ENVIRONMENTAL CONTROLS
TRIMLINE “NP17” SERIES
SIDE-MOUNTED AIR CONDITIONERS
Standard Features
• Built-in Condensate Evaporator
• CFC-Free Refrigerant
• EMI/RFI Suppressor
• Low Temperature Control Thermostat
• M/TAB Mounting System
• NEMA 12 Rating Maintained (UL50)
• UL/CUL Listed
• Gray Powder Finish
Accessories and Options
• Cooling Effect Detector
NEMA
TYPE 12
MAINTAINED
• Filter Recoating Adhesive
• Filters for replacement
• Internal corrosion protection
• Lifting Eyes
• Low Ambient Kit
• Short Cycle Protector
‡
• Special materials or finishes
• Special motors, line cords, or
connectors
• Stainless or Aluminum Cabinet
• Weather Protection Kit
M/TAB
12.25
[311.2]
THERMOSTAT
ADJUSTMENT
ACCESS
3
4
PERFORMANCE CHART
WA4C2.0NP17L
4000
3500
3000
2500
2000
1500
1000
500
Cooling Capacity (BTU/H)
0
70
KA4C2.0NP17L
Maximum enclosure
air temperature ºF
80
90 100 110 120 130
Ambient Temperature (ºF)
Operation within shaded area not
recommended.
12.13
[308.1]
1
17.50
[444.5]
2
9.00
[228.6]
125
120
110
100
90
75
80
TRIMLINE SERIES NP17 AIR-COOLED PANEL-MOUNTED AIR CONDITIONERS