A02 SOW Attachment 2 Interface Standard MIL-STD-1408D 2APR2009.pdf

Interface Standard for IECUs

INCH-POUND

MIL-STD-1408D (CR4)

2 April 2009

SUPERSEDING

MIL-STD-1408C

24 May 2001

DEPARTMENT OF DEFENSE

INTERFACE STANDARD

AIR CONDITIONERS

IMPROVED FAMILY OF MILITARY AIR CONDITIONERS,

GENERAL APPLICATION CHARACTERISTICS

FSC 4120

DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.

MIL-STD-1408D(CR4)

ii

FOREWORD

1. This military standard is approved for use by all Departments and Agencies of the Department of Defense.

2. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: U.S. Army Research, Development and Engineering Command, CERDEC, ATTN:

AMSRD-CER-C2-AP-ES, 10125 Gratiot Road, Suite 100, Fort Belvoir, VA 22060-5816 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

iii

CONTENTS

Paragraph: Page

1. SCOPE

1.1 Scope

2. APPLICABLE DOCUMENTS

2.1 General

2.2 Government documents

2.2.1 Specifications and Standards

2.3 Non-Government Publications

3. DEFINITIONS

3.1 Definitions and abbreviations

4. GENERAL INFORMATION

4.1 Capacity

4.2 Design

4.3 Reduction in air flow

5. DETAIL REQUIREMENTS

5.1 The family of military air conditioners

5.1.1 Compact air conditioners

5.1.2 Horizontal compact air conditioners

5.1.3 Vertical compact air conditioners

5.1.4 Tables and Figures

5.1.4.1 Condenser Air Intake and Discharge

5.2 Method of reference

6. NOTES

6.1 Intended use

6.2 Issue of DoDISS

6.3 Subject term (key word) listing

6.4 Changes from previous issue

Figures:

1. Horizontal compact air conditioner, 9,000 Btu/hr . . 5

2. Horizontal compact air conditioner, 18,000 Btu/hr. . 10

3. Horizontal compact air conditioner, 36,000 Btu/hr. . 15

4. Vertical compact air conditioner, 9,000 Btu/hr . . . 20

5. Vertical compact air conditioner, 18,000 Btu/hr. . . 24

6. Vertical compact air conditioner, 36,000 Btu/hr. . . 28

Tables:

1. Horizontal compact air conditioner, 9,000 Btu/hr. . . 4

2. Horizontal compact air conditioner, 18,000 Btu/hr . . 9

3. Horizontal compact air conditioner, 36,000 Btu/hr . . 14

4. Vertical compact air conditioner, 9,000 Btu/hr

5. Vertical compact air conditioner, 8,000 Btu/hr

6. Vertical compact air conditioner, 36,000 Btu/hr . . . 27

1. SCOPE

1.1 Scope. This standard serves as a catalog of units comprising the improved family of military air conditioners. It presents capabilities, interface criteria, and application characteristics useful in selecting a unit to meet a defined need. In cases where the need is not well defined, reference to applicable Purchase Description is invited and encouraged.

2. APPLICABLE DOCUMENTS

2.1 General. The documents listed in this section are specified in sections 3, 4, and 5 of this standard. This section does not include documents cited in other sections of this standard or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3, 4, and 5 of this standard, whether or not they are listed.

2.2 Government documents.

2.2.1 Specifications and standards. The following specifications, and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2).

SPECIFICATIONS

DEPARTMENT OF DEFENSE

MIL-C-5015, MS3450 & MS3456 - Connectors, Receptacle & Plug

(Unless otherwise indicated, copies of the above specification is available from the website “http://assist.daps.dla.mil/quicksearch/”.)

2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation.

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS

(ASHRAE)

STD 16 - Method of Testing for Rating Room Air Conditioners and Packaged Packaged Terminal Air Conditioners.

STD 37 - Method of Testing for Rating Unitary Air Conditioning and Heating Heating Pump Equipment.

(Application for copies should be addressed to the American Society of Heating, Refrigerating and Air-Conditioning Engineers, 1791 Tullie Circle, NE, Atlanta, GA 30329.)

3. DEFINITIONS

3.1 Definitions and abbreviations. The definitions and abbreviations used in this standard are as follows:

AC - Alternating current

A/C - Air conditioner - A device with the primary function of cooling air. This cooled air is then used to cool equipment and personnel within an enclosure. An A/C may or may not include supplemental heating capability. Usually provides secondary effect of dehumidifying and filtering the air being circulated within the space (see the figures specified in 5.1.4).

Btu - British thermal units - The quantity of heat required to raise the temperature of one pound of water one degree Fahrenheit at, or near, its point of maximum density (39.1 F).

Btu/hr - British thermal units per hour.

Dry bulb - Dry bulb temperature is that measured by an ordinary temperature thermometer. It indicates only sensible heat changes.

F - Fahrenheit

Hz - Hertz (a unit of frequency, expressed in cycles per second).

lbs - Weight, pounds.

kW - Kilowatt (1,000 watts).

psi - Pressure, pound per square inch.

scfm - Standard cubic feet per minute - Cubic feet of air flow per minute at 14.69 psi and 58.73 F conditions.

TBD - To be determined wg - Water gage - Pressure, in inches of water. On the data sheets, this is used to express the external static pressure on the A/C evaporator when describing conditions at which A/C conditioned air flow was measured.

4. GENERAL INFORMATION

4.1 Capacity. All air conditioners shall be capacity tested in accordance with American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) standard 16 or 37, as applicable.

4.2 Design. All air conditioners covered by this standard have been designed for installation inside or outside of vans, stationary and mobile shelters, and similar enclosures, provided unrestricted outdoor ambient air is available to the unit for proper operation. Unless otherwise noted, one place decimals shall be .5, 2 place decimals shall be .25, 3 place decimals shall be .015. The input and alternate power input connectors shall be wired in accordance with the following:

Pin A shall be Phase A or line 1 Pin B shall be Phase B, or line 2, if applicable Pin C shall be Phase C, or line 3, if applicable Pin D shall be neutral, or N Pin E shall be ground.

4.3 Reduction in airflow. A reduction in the unit’s rated airflow and cooling performance can be expected should the static pressure, as specified on item 14 of the tables, be exceeded by the installation of external ducts, filters, registers, or other devices which restrict the flow of air to and from the A/C.

5. DETAIL REQUIREMENTS

5.1 The family of military air conditioners. The family consists of units ranging from 9,000 Btu/hr cooling to 36,000 Btu/hr cooling. These units are arranged into two categories: horizontal compact and vertical compact. All units cool, dehumidify and heat. The heating capacity is designed so that the power demand in the heating mode approximates that of the cooling mode.

5.1.1 Compact air conditioners. The compact air conditioners are intended to satisfy the majority of requirements of the Field Army. They are designed for minimum size and weight, standardization of components, minimum power requirement, a tolerance of variations in power supply, and maximum reliability and maintainability consistent with their relatively small interior volume. Their features include:

a. Rugged construction and able to withstand high levels of shock and vibration.

b. Automatically controlled heating as well as cooling.

c. Compatibility with collective protection systems.

d. Fresh air ventilation with or without cooling or heating.

e. Self-protection against abnormal temperatures.

f. Self-protection against cutoff of condenser airflow.

g. Compatibility with sensitive electronic systems.

5.1.2 Horizontal compact air conditioners. The horizontal units are designed with their maximum dimension in the horizontal direction.

5.1.3 Vertical compact air conditioners. The vertical air conditioners have their maximum dimension in the vertical direction for applications where available space and the specific cooling requirement dictate a relatively narrow, tall unit.

5.1.4 Tables and Figures. Tables 1 through 6 depict some requirements of the air conditioners; other requirements are shown in applicable Purchase Description.

Figures 1 through 6 depict pictorial representation of required features and necessary dimensional requirements.

5.1.4.1 Condenser Air Intake and Discharge. For all horizontal units, condenser air intake and discharge openings shall be located on the rear of the air conditioners (as shown in the applicable figures). If desired, these openings may be located on the rear of the air conditioners and both right and left sides of the air conditioners. The side openings shall not extend beyond the rear half of the air conditioners.

5.2 Method of reference. Reference to models should include the capacity, horizontal or vertical, and electrical characteristics of the desired air conditioner; information may be found on the tables and figures provided herein.

Table 1: Air Conditioner, Compact, Horizontal, 9,000 Btu/hr

1. Operating Temp.

Range Cooling: 0 to 125oF Heating: -50 to 80oF

2. Control Internal or remotely mounted control panel

3. Mounting Base Mounted

4. Refrigerant R-410A

5. National Stock Number

6. Line Item

A23828 A23955

7.

SSN M773 M916

8. Minimum Cooling Capacity

Sensible: 6,600 Btu/hr Total: 9,000 Btu/hr

Sensible: 6,600 Btu/hr Total: 9,000 Btu/hr

9. Minimum Heating Capacity

7,000 Btu/hr 7,000 Btu/hr

10. Volts, AC 115 208 Phase 1 3

Frequency, Hz 50/60 50/60 Wires 3 5

11.a Maximum Power Consumption

3.2 kW 3.2 kW

11.b

Maximum Power Consumption Desired (Not applicable for Heat mode)

2.0 kW 2.0 kW

12.

Minimum Power Factor 0.85 0.85

13. Maximum Current

36.4 amps. [10% voltage low =

103.5 V and max 3.2 kW and

0.85 power factor]

11.6 amps

14.

Minimum Evaporator Airflow

300 scfm @ 0.125 inch external water gage (wg)

300 scfm @ 0.125 inch external water gage (wg)

14.a Maximum Gross Weight 180 lbs 180 lbs

15.b Maximum Gross Weight Desired 160 lbs 160 lbs

16.

Fresh-Air Airflow 35 scfm 35 scfm

17.

Power Connector, A/C MS3450W18-11P MS3450W18-11P

Matching Connector MS3456W18-11S MS3456W18-11S

FIGURE 1. Horizontal Compact Air Conditioner, 9,000 Btu/hr (Sheet 1 of 4)

4X .375-24 UNF THREADS

FIGURE 1. Horizontal Compact Air Conditioner, 9,000 Btu/hr (Sheet 1 of 4)

Table 2: Air Conditioner, compact, Horizontal, 18,000 Btu/hr

1.

Operating Temp.

Range

Cooling: 0 to 125oF Heating: -50 to 80oF

2. Control Internal or remotely mounted control panel

3. Mounting Base Mounted

4. Refrigerant R-410A

5. National Stock

6. Line Item Number

A24463 A24017

7. SSN

M918 M917

8. Minimum Cooling Capacity

Sensible: 13,100 Btu/hr Total: 18,000 Btu/hr

Sensible: 13,100 Btu/hr Total: 18,000 Btu/hr

9. Minimum Heating Capacity

13,000 Btu/hr 13,000 Btu/hr

10. Volts, AC 208 230

Phase 3 1 Frequency, Hz 50/60 50/60 Wires 5 3

11.a Maximum Power Consumption 5.0 kW 5.0 kW

11.b

Maximum Power Consumption Desired (Not applicable for Heat mode)

3.8 kW 3.8 kW

12. Minimum Power Factor 0.85 0.85

13. Maximum Current

18.2 amps. [10% voltage low = 187.2 V and max 5.0 kW and 0.85 power factor]

28.4 amps. [10% voltage low = 207.0 V and max 5.0

Minimum Evaporator Airflow

590 scfm @ 0.25 inches external water gage (wg)

590 scfm @ 0.25 inches external water gage (wg)

15.a Maximum Gross Weight

250 lbs 250 lbs

15.b Maximum Gross Weight Desired

225 lbs 225 lbs

16. Fresh-Air Airflow 70 scfm

70 scfm

17.

Power Connector, A/C MS3450W18-11P MS3450W18-11P

Connector MS3456W18-11S MS3456W18-11S

FIGURE 2. Horizontal Compact Air Conditioner, 18,000 Btu/hr (Sheet 1 of 4)

AIR CONDITIONER

MOUNTING BOLT HOLES

4X .375-24 UNF THREADS

Table 3: Air Conditioner, Compact, Horizontal, 36,000 Btu/hr

1. Operating Temp.

Range

Cooling: -25 to 125oF

3. Mounting Base Mounted

5.

National Stock Number

6.

Line Item Number A24763

7.

SSN

M811

8.

Minimum Cooling Capacity

Sensible: 26,300 Btu/hr Total: 36,000 Btu/hr

9.

Minimum Heating Capacity 30,700 Btu/hr

10. Volts, AC 208

Phase 3 Frequency, Hz 50/60 Wires 5

11.a Maximum Power Consumption

10.0 kW

11.b

Maximum Power Consumption Desired (Not applicable for Heat mode)

6.8 kW

12. Minimum Power Factor

0.85

13. Maximum Current

36.3 amps. [10% voltage low = 187.2 V and max 10.0

Evaporator Airflow

1250 scfm @ 0.25 inch external water gage (wg)

15.a Maximum Gross Weight 395 lbs

15.b Maximum Gross Weight Desired 350 lbs

16. Fresh-Air Airflow 140 scfm

A/C SM3100R24-79P

Connector 10-72624-79S

LIFTING RING

FIGURE 3. Horizontal Compact Air Conditioner, 36,000 Btu/hr (Sheet 1 of 4)

FIGURE 3. Horizontal Compact Air Conditioner, 36,000 Btu/hr (Sheet 1 of 4)

LIFTING RING

Table 4: Air Conditioner, Compact, Vertical, 9,000 Btu/hr

Cooling: 50 to 125oF

3. Mounting Base mounted; additional fastening at rear

Number

6.

Line Item Number A23960

7.

SSN

M912

8.

Minimum Cooling Capacity

Sensible: 5,400 Btu/hr Total: 9,000 Btu/hr

9.

Minimum Heating Capacity 6,000 Btu/hr

10. Volts, AC 115

Phase 1

Wires 3

11.a Maximum Power Consumption

3.4 kW

11.b

Maximum Power Consumption Desired (N/A for Heat mode)

2.5 kW

12.

Minimum Power Factor 0.85

13. Maximum Current

38.7 amps. [10% voltage low = 103.5 V and max 3.4 kW and 0.85 power factor]

Evaporator Airflow

300 scfm @ 0.125 inches external water gage (wg)

15.a Maximum Gross Weight 180 lbs

15.b Maximum Gross Weight Desired 160 lbs

35 scfm

A/C MS3450W20-4PX

Connector MS3456W20-4SX

Table 5: Air Conditioner, Compact, Vertical, 18,000 Btu/hr

Cooling: 50 to 125oF Heating: -50 to 80oF

2. Control Internal or remotely mounted control panel

3. Mounting Base mounted; additional fastening at upper rear

4. Refrigerant R-410A

Number

6.

Line Item Number A24455

7.

SSN

M899

8.

Minimum Cooling Capacity

Sensible: 11,700 Btu/hr Total: 18,000 Btu/hr

9. Minimum Heating Capacity

12,000 Btu/hr

Wires 5

11.a Maximum Power Consumption 6.0 kW

11.b

Maximum Power Consumption Desired (N/A for Heat mode)

4.0 kW

12. Minimum Power Factor

0.85

13. Maximum Current

21.8 amps. [10% voltage low = 187.2 V and max 6.0 kW and 0.85 power factor]

Evaporator Airflow

570 scfm @ 0.125 inches external water gage (wg)

15.a Maximum Gross Weight 255 lbs

15.b Maximum Gross Weight Desired 225 lbs

70 scfm

A/C MS3450W18-11P

Connector MS3456W18-11S

Table 6: Air Conditioner, Compact, Vertical, 36,000 Btu/hr

Cooling: 0 to 125oF Heating: -50 to 80oF

2. Control Internal or remotely mounted control panel

3. Mounting Base mounted; additional fastening at rear

4. Refrigerant R-410A

5.

National Stock Number

6. Line Item Number A24934

7. SSN M814

8. Minimum Cooling Capacity

Sensible: 20,900 Btu/hr Total: 36,000 Btu/hr

9. Minimum Heating Capacity

28,000 Btu/hr

Frequency, Hz 400

Wires 5

11.a Maximum Power Consumption 10.0 kW

11.b

Maximum Power Consumption Desired (N/A for Heat mode)

6.8 kW

12. Minimum Power Factor

0.85

13. Maximum Current

36.3 amps. [10% voltage low = 187.2 V and max 10.0

Evaporator Airflow

1250 scfm @ 0.25 inch external water gage (wg)

15.a Maximum Gross Weight 410 lbs

15.b Maximum Gross Weight Desired 370 lbs

16. Fresh-Air Airflow 140 scfm

17.

Power Connector, A/C SM3100R24-79P

Connector 10-72624-79S

6. NOTES

(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)

6.1 Intended use. This standard is intended for use in selecting air conditioning units to meet a defined need.

6.2 Issue of DoDISS. When this standard is used in acquisition, the applicable issue of the DoDISS must be cited in the solicitation (see 2.2.1 and 2.3).

6.3 Subject term (key word) listing.

Compact, horizontal Compact, vertical Compact unit

9,000 Btu/hr 18,000 Btu/hr 36,000 Btu/hr

6.4 Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extensiveness of the changes.

Custodian: Preparing activity:

Army - CR4 Army - CR4

Project 4120-A