Mil-Spec Cabinet Cooling

Whether space is limited inside or outside your NEMA-4X enclosure, TECA has a solution. Air conditioner models mount outside, through, or internal to the enclosure per your needs. TECA’s thermoelectric air conditioners for Mil-Std 810 and NEMA-4X enclosures are built with mil-spec hot side fans and can be exposed to rain, wash-down, salt spray, blowing sand and shock per Mil-Std 810 (Shock & Corrosion) and the NEMA-4X environment rating.

Please contact TECA for configurations which offer full shock and vibration protection (Mil-Std 810 Shock, Vibration and Corrosion).

Thermoelectric cooling capacities range from the AHP-250X model which offers 130 BTU/hr to the AHP-6263X model which offers 5,660 BTU/hr. Most TECA air conditioners include the “Eco-Mode” temperature control feature, in which passive cooling saves energy by limiting the need for active cooling. Eco-Mode reduces the cost of operation for TECA air conditioners. The solid-state construction is the perfect low-maintenance solution for hard-to-access areas. There are no filters to change and no moving parts except for the fans.


Model NumberMountingCooling Capacity
BTU/HR
COPVoltage
VAC (VDC)
Current
AMPS
AHP-6263XThrough60000.36240 (3 PH)11
FHP-6263XFlush (external)49700.32240 (3 PH)11
AHP-6252XThrough51960.72409.2
FHP-6252XFlush (external)44800.62409.2
AHP-6250XThrough43400.7612014
FHP-6250XFlush (external)38200.6712014
AHP-4252XThrough38100.3724012.5
FHP-4252XFlush (external)36150.3524012.5
AHP-4250XThrough24900.981206
FHP-4250XFlush (external)24080.981206
AHP-3253XThrough29730.72240 (3 PH)2.9
FHP-3253XFlush (external)25930.63240 (3 PH)2.9
AHP-3254XThrough26860.84208 (3 PH)2.6
FHP-3254XFlush (external)22350.61208 (3 PH)2.6
AHP-3252XThrough26100.72404.6
FHP-3252XFlush (external)22900.612404.6
AHP-3250XThrough22500.781207
FHP-3250XFlush (external)19780.71207
AHP-2252XThrough20600.42406.5
FHP-2252XFlush (external)18750.352406.5
AHP-2250XThrough14000.951203.6
FHP-2250XFlush (external)12200.831203.6
AHP-2250XThrough14201.16-2414
FHP-2250XFlush (external)12501-2414
AHP-1801XThrough11000.272405
AHP-1800XThrough11000.271208
AHP-1800XThrough11000.74-2418
AHP-1200XThrough5300.321204
AHP-1200XThrough5300.71-249
AHP-690XThrough4670.52-2415
AHP-590XThrough4600.85-246.9
FHP-590XFlush (external)4160.75-246.9
IHP-590XInternal3150.56-246.9
AHP-570XThrough3051.25-243
FHP-570XFlush (external)2511-243
IHP-570XInternal2400.97-243
AHP-470XThrough3150.56-247
FHP-470XFlush (external)2590.48-247
IHP-470XInternal2280.4-247
AHP-450XThrough2071.12-242.3
FHP-450XFlush (external)1970.96-242.3
IHP-450XInternal1570.83-242.3
AHP-270XThrough1610.46-244.1
AHP-250XThrough1290.53-243

AHP-3259

High Capacity Thermoelectric Air Conditioner

  • Mounting Style: Through Mounted
    Voltage: 100-240 VAC
    Current: 11-4.6 AMPS
    Operating Ambient: -40/+65 °C
    Operating Enclosure: -10/+60 °C
    Environments: Nema-12, Nema-4

    Performance Rating:
    Cooling (Traditional):
    2400 BTU/HR
    Cooling (Din 3168): 705 WATTS
    Cooling COP (at L35 L35): 0.64
    Heating (Traditional): >1200 BTU/HR
    Heating (Din 3168): >352 WATTS
    Heating COP: >1.0

    Includes:
    • Power supply
    • Temperature controller
    • Power saving heat exchanger mode (ECO-Mode)
    • Mounting gasket
    • Mounting hardware
    • Power input cord

    Controller Features:
    TC-4F: Active cool 35 °C; ECO-Mode 25 °C
    TC-7F: Active cool 35 °C; Active heat 15 °C; ECO-Mode 25 °C

  • Click on the part numbers to request a quick quote:
    MODEL NUMBERPART NUMBERNOTESCONTROLLERENVIRONMENT
    AHP-32590-I5JB-0-000
    Cool onlyTC-4FNEMA-12, IP 52
    AHP-32590-I55B-0-000
    Cool only5-32 VDC external signalNEMA-12, IP 52
    AHP-3259HC0-I5IB-1-000
    Heat/CoolTC-7FNEMA-12, IP 52
    AHP-3259HC0-I55B-1-000
    Heat/Cool5-32 VDC external signalNEMA-12, IP 52
    AHP-3259XE0-I5JB-4-000
    Cool onlyTC-4FNEMA-4, IP 56
    AHP-3259XE0-I55B-4-000
    Cool only5-32 VDC external signalNEMA-4, IP 56
    AHP-3259XEHC0-I5IB-5-000
    Heat/CoolTC-7FNEMA-4, IP 56
    AHP-3259XEHC0-I55B-5-000
    Heat/Cool5-32 VDC external signalNEMA-4, IP 56
    AHP-3259HC0-I5LB-5-000
    Heat/CoolTC-5300D PWM controlNEMA-12, IP 52
    AHP-3259XEHC0-I5LB-5-000
    Heat/CoolTC-5300D PWM controlNEMA-4, IP 56
  • Click to download:

    Solid Model files:
    TypeFile NameDate ModifiedSize

    IGS
    AHP 3259 8:36 am 11/04/201665.1M

    PDF
    AHP 3259 8:35 am 11/04/20165.6M

    SLDP
    AHP 3259 8:36 am 11/04/201620.8M

    STEP
    AHP 3259 8:36 am 11/04/201641M
  • Part NumberDescriptionDrawingData Sheet
    EH-2001200 Watts Enclosure heater
    120 VAC
    dwgpdf
    EH-2002200 Watts Enclosure heater
    240 VAC
    dwgpdf
    EH-4001400 Watts Enclosure heater
    120 VAC
    dwgpdf
    EH-4002400 Watts Enclosure heater
    240 VAC
    dwgpdf
    DVA-3200Drip pan, vertical cold side finsdwgpdf
    DHA-3200Drip pan, horizontal cold side finsdwgpdf
    D-100Condensate discharge, plasticpdf
    D-200Condensate discharge, ST.ST.pdf

Features:
• 90-264 VAC Universal input power supply
• High capacity thermoelectric design
• Power saving air to air heat exchanger mode (ECO-Mode)
• Heavy duty full perimeter mounting
• Lower profile intrusion into enclosure
• Central input cord for easy mounting
• Closed loop design
• Condensate control and evaporation system
• Compact
• Increased efficiency at higher ambient by as much as 10%
• Virtually maintenance free
• No compressor
• Environmentally friendly and safe
• Stainless Steel exterior housing
• Mounts and operates in any orientation
• Integral temperature controller
• Weight 82 LBS.


Resources:

Air conditioner Notes

Applications

Accessories

Manuals

Sizing Software

Contact Us

Design Considerations

Design Considerations:

NEMA/IP
NEMA Ratings:

NEMA-12: Type 12 enclosures are intended for indoor use primarily to provide a degree of protection against dust, falling dirt, and dripping non-corrosive liquids. Applies to AHP & FHP models.

Source: NEMA Publication N0. 250, Part 1, Page 1


NEMA-4: Type 4 enclosures are intended for indoor and outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose directed water.  TECA products with the “XE” designation use sealed fans, sealed components, stud/gasket mounting and Mil- Spec finishes.  They are designed to maintain the enclosure rating and perform in the rated environment. Applies to AHP-XE & FHP-XE models.

Source: NEMA Publication N0. 250, Part 1, Page 1


NEMA-4X: Type 4X enclosures are intended for indoor and outdoor use primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose directed water.  TECA products carrying the “X” designation use Mil-Spec fans, o-ring sealed power supplies, no exposed electronic components, stud/gasket mounting and Mil-Spec finishes. They are designed to maintain the enclosure rating and perform in the rated environment. Applies to AHP-X & FHP-X models.

Source: NEMA Publication N0. 250, Part 1, Page 1

IP Rating
The IP (Ingress Protection) standard describes a uniform system for classifying the degrees of protection provided by the enclosures of electrical equipment. The first number refers to the level of protection against penetration of solid objects into the enclosure. The second number refers to the level of protection against penetration of liquids into the enclosure.

1st Number
Level of Protection
2nd Number
Level of Protection
0
No protection
0
No protection
1
Protection against objects over 50mm, accidental touch by hands
1
Protection against vertically dripping water
2
Protection against objects over 12mm, protection against touch by fingers
2
Protection against liquid drops at 15° from vertical
3
Protection against objects over 2.5mm, tools, wires, etc.
3
Protection against rain at angle of up to 60° from vertical
4
Protection against objects over 1mm, small tools, wires, etc.
4
Protection against splash from any direction
5
Complete protection against contact. Protection against harmful ingress and deposit of dust
5
Protection against water jets from any direction
6
Complete protection against contact. Protection against ingress of dust
6
Protection against heavy sea water
 
 
7
Protection against immersion in water under stated conditions of pressure and time
 
 
8
Protection under indefinite immersion in water under specified pressure
Military Standards
Military Standards (Mil-Std 810):

Corrosion: (Salt Fog Testing) Method 509.2,168 Hours. Applies to AHP-X models.
Vibration: Method 514.3, 2 hours, x,y,z axis 8.9 G’s. 10-2000 Hz with a magnitude of 0.04 G²/Hz.
Applies to XM (consult factory) models

Vibration: Method 514.3, 2 hours, x,y,z axis 8.9 G’s. 10-2000 Hz with a magnitude of 0.04 G²/Hz. Applies to XM (consult factory) models.

Shock: Method 516.2, with 30 G’s peak amplitude, 11ms pulse duration, half-sine waveform, and three (3) shocks in each direction along three (3) mutually orthogonal axes. Employed for all XM versions. Standard models are designed to withstand 2.2 G’s.
Applies to AHP-1200X, 1201X, 1200XP, 1201XP, AHP-1800X, 801X, 1800XP & 1801XP  models

Source: Mil-Std 810

NEC
NEC – National Electrical Code:

CID2 Class I, Division 2 (Hazardous Environments) – a location (1) in which volatile flammable liquids or flammable gases are handled, processed, or used, but in which the liquids, vapors, or gases will normally confined within closed containers or closed systems from which they can escape only case of accidental rupture or breakdown such containers or systems, or in case of abnormal operation of equipment; which ignitable concentrations of vapors are normally prevented by mechanical ventilation, and which become hazardous through failure operation of the ventilating equipment; that is adjacent to a Class I, Division location, and to which ignitable concentrations gases or vapors might occasionally communicated unless such communication prevented by adequate positive-pressure ventilation from a source of clean air, safeguards against ventilation failure pro-vided.
Applies to AHP-XP models

Groups (A-D) Atmospheres containing following: acetylene, hydrogen, fuel, combustible process gases containing 30% hydrogen by volume, or gases of equivalent hazard such as butadiene, ethylene oxide, propylene oxide, acrolein, ether, ethylene, or gases or vapors equivalent hazard such as acetone, ammonia, benzene, butane cyclopropoane, gasoline, hexane, methanol, methane, naphtha, propane, or gases or vapors equivalent hazard.
Applies to AHP-XP models
Source: NEC 2005, Article 500

UL/CSA
UL- 1604: Hazardous duty operation, Class I and II Division 2, Class III Div 1 and 2. Tested thru ETL and ETLc Testing Laboratories, Report #551722.
Applies to AHP-XP models

UL-1995 & CSA 22.2: Heating and Cooling Equipment, Categories 169 & 294, No. 236- M90. Tested thru ETL and ETLc Testing Laboratories, Report #532015.
Applies to the following air conditioner models: AHP-1200, 1201, 1202, 18001, 1801, 1802, 1501; AHP-1200XE, 1202XE, 1501XE, 1800XE, 1802XE;  FHP-750, 752, 1501; FHP-750XE, 752XE, 1501XE

UL-3101-1 & CSA 22.2: Electrical equipment for laboratory use. Safety requirements for electrical equipment for measurement, controls and laboratory use. Tested thru ETL and ETLc Testing Laboratories, Report #20022721.001.
Applies to TLC-700, TLC-702 liquid chiller models

CE
EN 60335-1 & EN60335-2-40: Safety of household & similar electrical appliances, part 1: General requirements.Part 2: Particular requirements for electrical heat pumps, air conditioners & dehumidifiers (IEC 335-2-40: 1992, Modified).
Low voltage directive 73/23/EEC – European Union (EU)
EMC directive 89/336/EEC – European Union (EU)
Tested thru ETL.
Applies to the following air conditioner models: AHP-1200, 1201, 1202, 18001, 1801, 1802, 1501; AHP-1200XE, 1202XE, 1501XE, 1800XE, 1802XE;  FHP-750, 752, 1501; FHP-750XE, 752XE, 1501XE

EN 61326, EN 61010-1 & EN 61010-2:
Application of council directive: Machinery directive (89/336/EEC)
Standard EN 61326:1997, Class A; EN 61326:1997, Industrial location
Low voltage directive 73/23/EEC – European Union (EU)
Standard EN 61010-1-A1:97; EN 61010-2-010-A1:97
Tested thru ETL.
Applies to TLC-700, TLC-702 liquid chiller models
Mounting
Mounting:

TECA’s FHP thermoelectric air conditioners are designed to mount on the outside of the enclosure. There is no intrusion within the enclosure allowing for greater design flexibility. A mounting plate provides for easy installation.

Side, Front, or Back Mounting:
This mounting orientation is recommended for applications with high humidity or incomplete cabinet seals. Condensation can be removed via moisture collection systems (standard on FHP-units and AHP-1400) or a drip pan positioned below the cold side fins. Drip pans are optional for thru mount style units.

Top Mounting: It is difficult to collect condensation in this orientation due to fin orientation and gravity. If a drip pan is employed by the end user, use caution to place the pan far enough away from the internal fan to minimize the restriction of air flow. The pan should cover the fin ends as well as the fan area. When there is a choice, side orientation is preferred by most users in high humidity environments.

Condensation
Condensation may form on the cold side fins when the surface temperature goes below the dew point temperature. To reduce the possibility of condensation or to transfer condensate to the outside of the enclosure consider the following:

  • Regulate the fin temperature above the dew point. Equations are provided for this purpose
  • Use desiccant (moisture absorbing granules)
  • Employ condensate removal system or drip pans

FHP-Series and models AHP-1400, AHP-1501 Air Conditioners contain built-in condensate removal systems. The condensate system consists of an anti-fungal sponge with a condensate wick. PVC tubing is also provided for drainage. The wick should extend below the cooling assembly to allow for a gravity feed.

Reliability
TECA Model AHP1200XHC

MTBF calculation was made using Telcordia SR-332, Method II.

Mean time between failures prediction ranges from 80,000 hours for ground benign, outdoor, 25C environment to 47,700 hours for ground mobile, outdoor, 70C environment.

On this website under “APPLICATIONS“, please also see the ongoing test of TECA Model AHP1800XEHC which has been in continuous service for over 80,000 hours outdoors on the roof. There is also a picture and description of a TECA Model AHP1200X with 120,000 hours of duty with no problems other than dirt!

MTBF

HIGH SPEED CRYSTAL OSCILLATORS

High Speed Crystal Oscillators:

High Speed Crystal Oscillators

The customer makes high performance crystal oscillators and atomic clocks for satellites and laboratories and they needed something for temperature control and stabilization.

They found TECA and the AHP-301CPV, tried one and say it is “working fantastic”. Well enough to order more for production, quality and engineering tests. They use them to maintain a stable temperature of the oscillator which in turn provides a stable frequency.

VACUUM CHAMBER

Vacuum Chamber:

vacuum chamber

 

Some engineers at Lucent wanted to cool devices inside a vacuum chamber and they didn’t want to reinvent the wheel. TECA’s been making devices like that for decades. They had a load of 10 to 20 watts generated and wanted -40 °C with about 15 °C to 20 °C water available.

A Custom LHP-800CP / LHP-300CP cascade, controller and power supply were supplied for a reasonable cost in a reasonable time frame.

LABORATORY APPLICATION

Laboratory Application:

laboratory application laboratory application

 

In March our customer said: “We are most likely going to soon order 1 of the AHP-301CPV.”

First though, can you please provide a quote on the manufacture of a top plate? We would like to fit:

  • 2 x 500 mL Schott bottles (the one I measured was 86mm diameter)
  • 2 x 250 mL Schott bottles (the one I measured was 68mm diameter)
  • 2 x 50 mL Schott bottles (the one I measured was 46mm diameter)

I’d guess that Schott do not make their bottles to too tight specifications, so we would need to allow some room for tolerances. What do you think? These could be arranged in any way that fit best and that minimized any top plate overhang over the cold plate beneath. We can foresee out-growing the 50 mL bottles, so ideally would like the ‘walls’ surrounding the 50 mL wells to be thick enough to later be drilled out so that the wells can accommodate 100 mL Schott bottles (the one I measured was 56mm diameter). The height of the top plate (i.e. depth of the wells) only need be about 70 mm. For the current application, we only need to chill to about 5 deg °C. Does the range we are interested in affect anything?

In May we shipped the custom “Beaker Block: and AHP-301CPV.

INDUSTRIAL MATERIAL

Industrial Material:

industrial material

In this example of an AHP-1200CP application a box surrounds the cold plate area. Materials are set directly upon the cold plate and the lid is closed. The material is cooled and temperature controlled without the large air cooling refrigerator.

ELECTRONIC TEST STATION

Electronic Test Station:

electronic test station

An aerospace contractor was interested in a large cold plate for the testing of electronic components.  We first offered them the AHP-1200CPV but they responded that the AHP-1200DCP was more the size they wanted.  Could we change it to a single plate?  Well, we couldn’t change the plate size but we could add an accessory plate which was larger.  And we could build the unit with one controller including all of the standard options.

Now they are using the 12” x 18” custom accessory plate and a special AHP-1200DCP to test electronic amplifiers by ramping the temperature up and down between +10 °C to +70 °C.  A custom solution at very nearly standard product price to fill a not so unusual need.

COOLING 64 DEGREES BELOW THE AMBIENT

Cooling 64 Degrees Below The Ambient:

cooling 64 degrees below the ambient cooling 64 degrees below the ambient

 

A medical device manufacturer uses a TECA Low-Temperature Cascade System in his design process. The Cascade System consists of a TECA Cold Plate and Cascade attachment. The system offers direct contact cooling to the customer’s load.

In this example, the customer was able to cool his load of Isopropyl Alcohol solution from +25 °C to -25 °C in about 35 minutes. Cooling to such low temperatures allowed the customer to package his very small , invasive medical device.

We received the following feedback from the customer: “I was eventually able to get it down to -38 °C at an ambient temperature of 26 °C. It beats the heck out of the system that is currently being used…This thing is working beautifully. Everyone is most impressed. Thanks!!!”

MEASURING PLANT METABOLISM

Measuring Plant Metabolism:

measuring plant metabolism plant metabolism measuring plant metabolism

 

A university-based agriculture research laboratory in Spain is measuring plant metabolism under various conditions. TECA Corporation’s high-capacity version of the AHP-1200CPV (please refer to part number 9-35KB-1-0A0 on our product specification sheet) is used to cool the plant to 22 °C. Precise temperature control is important in this application as the plant’s roots must not get too cold.

There is a significant heat load to deal with as well: the plant is being illuminated with LED lights. Finally, thermal contact is an issue. The plant is inside a glass container, which is inside an aluminum block, which is placed on the AHP-1200CPV Cold Plate surface. Working closely with TECA engineers, the customer was successfully able to integrate the AHP-1200CPV Cold Plate into this unique experiment design and his sensitive thermal management needs were met.

The customer shared with us: “Your suggestion to add water between the glass and the aluminum block is a good one. It does lower the temperature inside, probably by increasing the thermal contact. The fit between the block and the glass is pretty tight. The glass was made first and then the block was drilled out using the glass as a reference. Still, even a tiny space basically ruins the heat transfer, so adding the water seems to fix that. Thanks for your help and suggestions, they were quite useful.”

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