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# PACKAGED TERMINAL HEAT 

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# I Standard 380 

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### IMPORTANT 

## SAFETYRECOMMENDATIONS
It is strongly recommended that the product be designed, construCted, assembled and installed in accordance with nationally recognized safety requirements appropriate for products covered by this standard. ARI, as a manufacturers' trade association, uses its best efforts to develop standards employing state-of-the

-art and accepted industry practices. However, ARI does not certify orguarantee safety of any products, components or systems designed, tested, rated, installed or operated in accordance with these standards or that any tests conducted under its guidelines will be**non-haz~rdous** 

### orfree from risk.



### ARI CERTIFICATION PROGRAM PROVISIONS 

## Scope ofthe Certification Program
The Certification Program includes all factory-made residential, commercial and industrial packaged terminal heat

' pumps, in all sizes, as defined in section 3. 

## CertifiedRatings
The following certification program ratings are verified by test: 1. 

### Cooling Capacity, Btuh, [Watts]. 2. Energy Efficiency Ratio, EER, Btuhlw, [WattslWatts]. 3. High Temperature Heating Capacity, Btuh, [Watts]. 4. High Temperature Coefficient ofPerformance (COP 47F). 5. Low Temperature Heating Capacity, Btuh. [Watts] 6. Low Temperature Coefficient ofPerformance (COP 47F). Conformance to the requirements ofthe Maximum Operating Condition Test, Voltage Tolerance Test, LowTemperature Operation Test, Insulati9n Efficiency Test, Condensate Disposal Test, and Air Infiltration Test (see Section 6) are also verified by test.

PnceSl5

.00 I'rrtftd III U.S.A 

### Note This Standard supersedes ARI Standard 380-87**~r.;;** i!:I COPYRIGHT 1990. byAir'Conditioning and Refrigeration Institute • •• ,. Registered United States Patent and Trademarlc Off tee 

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### C ./

TABLE OF CONTENTS PART PAGE Section 1. Purpose

......................................................................**~** . . 1 Section 2. Scope

........................................................................... 1 Section 3. Definitions

...................................................................... 1 Section 4. Standard Equipment

.......................... . ........ . .......................... 2 Section 5. Rating Requirements

...................... . ...................................... 2 Section 6. Performance Requirements

......... ,. ............................................. 3 Section 7

.. Voluntary Conformance 

### 5

Date Due**.,j.~~** i :**_r~** 

## I M



### AY 24. 1993 

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I

KEH-411 (1-841

# PACKAGED TERMINAL HEAT PUMPS

Section 1. Purpose 

### 1.1 Purpose. Thepurposeofthis standardis to establish. for packaged terminal heatpumps: definitions and classifications; standard equipment: requirements for testing and rating; specifications, literature and advertising requirements; performance requirements; design, constructionandassemblyrequirementsfor safety; andconformance conditions. 1.1.1 This standardis intended for the guidance of the industry, including manufacturers. architects and engineers. contractors and users
. 

### 1.2 Review andAmendment. This standard is subject to review and amendment as the technology advances.

Section 2. Scope 

### 2.1 Scope. This standard applies to factory-made residential. commercial and industrial packaged terminal heat pumps, in all sizes, as defined in 3.l. 

### 2.2 Exclusions. This standard does not apply to the rating and testing of individual assemblies, such as a cooling section or heating section, for separate use. 2.2.1 This standard does not apply to room air conditioners [as defined in the ANSI Standard for 

### RoomAirConditioners (Association ofHomeAppliance Manufacturers Standard ANSIIAHAM RAC-1-1982)], to room fan-coil air conditioners (as defined in ARI Standard 440 for 

### Room FanCoil Air Conditioners), to water-source heat pumps (as defined in ANSI! ARI Standard 320 for 

### Water-Source Heat Pumps), or to packaged terminal air-c<;lOditioners (as defined in ARI Standard 310 for 

### Packaged Terminal**Air-Con~itioners).**
Section 3. Definitions 

### 3.1 Packaged Terminal Heat Pump. Package terminal heat pump means a separate unencased refrigeration system installed in a cabinetofsimilarfunction and configuration to thatofa packagedterminal air-conditioner. It utilizes reverse cycle refrigeration as its prime heat source and shouldhave othersupplementaryheatsource available to builders with the choice ofhot water, steam or electric resistance heat.


### 3.1.1 Installation. The assembly is intended for free conditioned-air distribution but, as an application condition, may be employed with minimal ductwork having a total external static resistance up to 0.1 in. ofwater HG. [24.9Pa]. 

### 3.2 Published Rating. Published Rating**i~** a statement of the assigned values of those performance characteristics, under stated rating conditions, by which a unit may be chosen to fit its application.These values apply to all units oflike nominal size and type (identification) produced by the same manufacturer. 

### 3.2.1 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 

### 3.2.2 Application Rating. A rating based on tests performed at application rating conditions (other than Standard Rating Conditions). 

### 3.3 Rating Conditions. Any set ofoperating conditions under which a single level of performance results, and which causes only that level ofperformance to occur. 

### 3.3.1 Standard Rating Conditions. Rating conditions used as the basis of comparison of performance characteristics.

. 

### 3.4 Energy Efficiency Ratio (EER). A ratio calculated by dividing the cooling capacity in Btuh by the power input in watts at any given set of rating conditions, expressed in Btu per watt-hour (BtuIW). 

### 3.4.1 Standard Energy Efficiency Ratio. A ratio calculated from the capacity and power input

. values obtained at Standard Rating Conditions. 

### 3.5 Coefficient ofPerformance (COP). A ratio calculated by dividing the total heating capacity provided by the refrigeration system including circulating fan heat but excluding supplementary resistance heat, Btuh by the total electrical input watts 

### x 3.412. [A ratio calculated for both cooling and heating capacities by dividing capacity in watts by power input in watts.] 

### 3.S.1 Standard Coefficient ofPerformance. A ratio calculatedfrom the capacity andpowerinput values (obtained in accordance with 3.5) at Standard Rating Heating Conditions. 

### 3.6 "Shall" "Should" 'fRecommended" or "It is 

### Recommended':. "Shall",':should","recommended" or"it is recommended" shall be interpreted as follows: 

### 3.6.1 Shall. Where "shall" or "shall not" is used for a provision specified, that provision is mandatory if compliance with the standard is claimed. 

### 3.6.2 Should, Recommended or It is Recommended. "Should", "recommended" or "it is recommended" is used to indicate provisions which

1" ., are not mandatorybut which are desirable as good practice. Section 4. Standard Equipment 

### 4.1 Equipment. A packagedterminal heatpumpmaybe intended for heating only, or both heating and cooling. Section 5. Rating Requirements 

### 5.1 Standard Ratings. Standard Ratings shall be established at the Standard Rating Conditions specified in 5.1.1 through 5.1.3. All Standard Ratings shall be verified by tests conducted in accordance with the ANSI! ASHRAE Standard 37-1988 

### Methods ofTestingfor Rat-

. ing Unitary Air Conditioning and Heat Pump Equipment, (AmericanNational StandardInstitute,American Society ofHeating, Refrigerating and Air Conditioning Engineers, Inc.), except that no secondary check shall be used and no ductwork shall be attached to the condenser, or (cooling) with the ASHRAE Standard 

### Method ofTestingfor RoomAir Conditioners and Packaged Terminal Air Conditioners (American Society of Heating, Refrigerating and AirConditioningEngineers, Inc. Standard 16-88), or (heatpumpheating) with ASH-

.RAE Standard 

### Method ofTestingfor Rating Room Air

Conditioner and Packaged Terminal Air Conditioner Heating Capacity (American Society ofHeating, Refrigerating and Air Conditioning Engineers, Inc. Standard 58-1986), and with the test method and procedures as described in this standard.

2 

### 5.1.1 Values ofStandard Ratings. Standard Ratings relating to capacities shall be net ratings, reflectirig the effects ofcirculating fan heat, but not including supplementary heat and shall be expressed only in terms ofBtuperhourBtuh [watts] in multiples of 100 Btuh [30 watts]. Cooling and heat pump heating capacity shall be expressed in total (sensible plus latent) capacity. Air flow rates sh.all be expressed in multiples of 10 cubic feet per mmute cfm, 

### [5Us]. Power input shall be expressed in multiples of5 watts.



### 5.1.1.1 Values ofStandard Energy Efficiency Ratios or Coefficients of Performance. Standard**ratio~** ofenergy efficiency for cooling, whenever pubhshed, shall be expressed in mUltiples ofthe nearest0.1 Btu/Wh [coolingCOPin multiplesof 0.1

## J:. standard coefficients ofperformance for heatang. wheneverpublished, shall beexpressed in multiples ofthe nea(est 0.1. 

### 5.1.2 Standard Rating Conditions. The conditions oftest for Standard katings shall include: 

### 5.1:2.1 Cooling (Not required for heating only uOIts) Air temperature entering indoor portion of air conditioner .................. 80F [26.7°C] dry bulb, 67F [19.4°C] wet bulb Air temperature entering outdoor

portion of unit

.... 95F [35.0°C] dry bulb (and 75F [23.9°C] wet bulbwhencondensateis rejected to the air stream)

.



### . Static pressure difference between

room air inlet and outlet of unit

.............. 0 in. water HG. [0 Pal Fan speed

........ Unit to be tested at manufacturer's recommended fan speed setting Ventilation dampers

................ closed 

### 5.1.2.2 Heating

a. 

### High Temperature Heat Pump Heating· Air temperature**enterin~** indoor portion ofunit.

. . . 70F [21.1°C] dry bulb, 60F [15.6°C] wet bulb, maximum AIr temperature entering outdoor portion ofunit

... .47F [8.3°C] dry • bulb,43F [6.1

### 0c] wet bulb b. 

### Low Temperature Heat Pump Heating· (This standard, ratingtemperatureonlyappliesif the manufacturer's published rating includes low temperature heatpump specifications) Air temperature entering indoor

portion of 

### unit

. .....70F [21.1°C] dry bulb, 60F [15.6°C] wet bulb, maxiJnllm Air temperature entering outdoor portion of unit

...... 17F [- 8.3°C] dry bulb, 15F [ - 9.4°C] wet bulb Static pressure difference between room air inlet and outlet ofunit

.....0 in. water HG. [0 Pal Fan speed

....'

.. Unit to be tested at manufacturer's recommended fan speed setting Ventilation dampers

... . ..........closed

• If unit defrosts during the test. the indoor supply air temperature shall not drop below 6S F [lS.3°e] for more than one minute. Compliance with this requirement is not required ifthe control circuitry is • such as to provide for supplementary heat during defrost.5.1.2.3 Air Flow. Inletairtemperature

...... 70F [21.1°C] to 80 F [26.7°C] dry bulb Heating or cooling means
.. . .... Not operated Static pressure difference between

room air inlet and outlet of unit

................... 0 in. water HG. [0 Pal Fan speed

.................... max. setting Ventilation dampers

................ closed 5.1.2.4 Electrical Conditions. Recommended nameplatevoltages for 60 Hertzsystemsare one or more of the utilization voltages shown in Table 1ofARI Standard 110 forAir ConditioningandRefrigerating EquipmentNameplate Voltages

. All Standard Rating tests shaH be performed at the nameplate rated voltage and frequency. 5.1.3 Equipment. The filter and any air-mixers, air-inlets, griHes, deflecting vanes. and, any other regularly-furnished equipment shall be in place during all preceding tests. 5.2 Standard Electrical Ratings. Standard electrical ratings ofwatts, power factor, Btu perwatt-hour (BtuIW), and coefficient of performance (COP), whenever published, shaH be based on tests conducted in accordance with, and at Standard Rating Conditions, described in 5.1.1 through 5.1.3, and shall be basedonthe total power input to the product, which includes the watts input to the compressor(s) and fanes), plus controls and accessories included as part ofthe model number. Electrical ratings in this paragraph shall be given at the voltage specified by the manufacturer. 5.3 Part-Load Rating. Packaged terminal heat pumps which are capable of capacity control shall be rated at each step of capacity reduction provided by the heat pump. and allowed by the controls. The conditions oftest for part-load ratings are the same as for the Standard Ratings (see 5.1) except for the following: 5.3.1 Cooling. Air temperature eptering outdoor portion ofunit

...........82 F [27.8°C] dry bulb (and 65 F [IB.3°C] wet bulb when condensate is rejected to the air stream) 5.3.2 Heating. Air temperature entering outdoor portion ofunit

...........62 F [16.7°C] drybulb. 56.5 F [13.6°C] wet bulb 5.4 Application Ratings. Ratings at conditions olher than those specified in 5.1.2 and 5.1.3 may bepublished as application ratings. and shall be based on dala determined by the methods oftesting prescribed in 5.1.
5.5 Publication ofRatings. Whenever application ratings are published or printed. they shaH include. or be accompanied by. the Standard**Rati~g.** clearly designated as such, including a statement"Ofthe conditions at which the ratings apply. 5.5.1 Size Designation. The size designation used in published specifications. literature. or advertising, controlled by the manufacturer. for heat pumps rated under this standard. are to be expressed only in Btuh [watts] at the Standard Rating Conditions specified in 5.1.2 and 5.1.3 and in, the terms described in 5.1.1 Horsepower. tons. or other units shall not be used as size designations.
5.6 To comply with this standard. published capacities. air flows, EER and COP for any production unit shall have an aHowance for testing and manufacturing variations. The amount of this allowance for capacity shaH not be lower than minus 5 percent ofthe rated values.

Section 6. Performance Requirements 6.1 Performance Requirements. To comply with this standard, packaged terminal heat pumps shaH be designed and produced in accordance with the**pr~visio~s** ofthis section,in such a mannerthat anyproduction umt wiH meet the requirements detailed herein. 6.2 Maximum Operating Conditions Test. Packaged terminal heat pumps shaH be designed and produced to pass the foHowing maximum operating conditions.**te~t** with an indoor coil air quantity and an outdoor coil aIr quantity as obtained when maintaining a static pressure of 0 in. water HG. [0 Pal difference between the respective air inlets and outlets ofthe unit. The unit shall be tested at the fan speed control setting employed for the Standard Rating Test-Cooling. 6.2.1 Temperature Conditions. 6.2.1.1 Cooling (not required for heating-only units) Air temperature entering indoor

portionofunit

...... 95 F [35.0°C] dry bulb. 71 F [21.2°C] wet bulb Air temperature entering outdoor portion of unit

...... 115 F [46.1DC] dry bulb (and 75 F [23.9D C] wet bul.b when condensate IS rejected to the condenser air stream)

34 6.2.1.2 Heating Air temperature entering indoor

portion ofunit

...... SO F [26.7°C] dry bulb Air temperature entering outdoor

portionofunit

...... 75 F [23.9°C] dry bulb, 65 F [IS.3°C] wet bulb
6.2.2 Vo/rages.

6.2.2.1 Tests shall be run**a~** 90 percent and 110 percent of the unit's nameplate rated voltage at the unit service connection and at rated frequency. 6.2.2.2 The power supplied to the heat pump shall be adjustedjust piror to the shutdown period (See 6.2.3.2) so that the resulting voltage at theunit's service connection is 86'percent of nameplate rated voltage when the·compressor is on locked rotor. (For those dual voltage units which specify a minimum voltage of5 per cent below the lower rated voltage, this locked-rotor voltage setting shall be 91 percent ofthe lower ratedvoltage.) Forthepurposeofthis standard, the compressor nameplate locked-rotor amperes may be used to determine this voltage. The proper value ofno-load voltage which will give the specified voltage at locked-rotor conditions should be determined prior to the test. 6.2.2.3 Within one minute after the heat pump has resumed continuous operation (See 6.2.4.3), the voltage shall be restored to the value specified in 6.2.2.1. 6.2.2.4 Dual voltage units whose lower voltage is 208 volts, and 208 volt single voltage units which specify on their specification sheets a minimum voltage to be applied at the unit service connection for the Maximum Operating ConditionsTest, shall be tested atthis minimum voltage in accordance with 6.2.2.1, 6.2.2.2 and 6.2.2.3. This provision applies only when the minimum voltage does not exceed 198Y. 6.2.3 Procedure. 6.2.3.1 The heat pump shall be operated for two hours at the temperature conditions and voltage(s) specified. 6.2.3.2 All powerto the heat pump shall be cut offfor a period sufficient to cause the compressorto stop (notto exceed five seconds) and then restored. 6.2.4 Requirements. 6.2.4.1 During both entire tests, the heat pump shall operatewithout damage to any ofits**parts ~**  6.2.4.2 The heat pump shall operate continuously withoutinterruption for any reason for the two-hour period preceding the power interruption. 6.2.4.3 The unit shall resume continuous operation within two hours of restoration of power and shall then operate continuously for one hour. Operation and resetting of safety devices priortoestablishmentofcontinuous operationis permitted. 6.3 Low-Temperature Operation Test (Cooling). (Not requiredfor heating-onlyunits). Packaged terminal heat pumps shall be designed and produced to pass the following low-temperature operation test when operating with initial air quantities as determined in the Standard RatingTest-Cooling, with 0in. waterHG. [0 PaJ static difference between airinlets and outlets ofthe unit, and with
·controls and dampers set to produce the maximum tendency to frost o' r ice the evaporator, provided such settings are not contrary to the manufacturer's instructions to the user. 6.3.1 Temperature Conditions. Air temperature entering indoor

portion ofunit

....... 67 F [I9.4°C] dry bulb, 57 F [I3.9°C] wei bulb Air temperature entering outdoor

portion of unit

...... 67 F [I9.4°C] dry bulb. 57 F [I3.9°C] wet bulb· 6.3.2 Procedure. Thetestshallbecontinuouswith the unit on the cooling cycle. for not less than twelve hours after establishment of the specified temperatureconditions.Theunitwillbepermitted to start and stop under control of an automatic limit device, ifprovided. 6.3.3 Requirements. 6.3.3.1 During the entire test, the heat pump shall operatewithout damage to the equipment. 6.3.3.2 During the entire test. frost orice shall not form on the cooling coil to the point where icing could progress to cause the air flow to be cut off. 6.3.3.3 Duringthetest, and during the defrostingperiodafterthecompletion ofthetest, all ice or meltage must be caught and removed by the drain provisions. 6.4 Insulation Efficiency Test (Cooling). (Not required for heating-only units). Heat pumps shall be designed and produced topass the following insulation efficiency

°The wet bulb temperature condition is not required when testing air-cooled condensers which do not evaporate condensate. 

# •

•test when operating with air quantities as determined with 0 in. water HG. [0 Pal static difference between air inlets and outlets of the unit, and with controls, fans, dampers, and grilles set to produce the maximum tendency to sweat, provided such settings are not contrary to the manufacturer's instructions to the user. 6.4.1 Temperature Conditions. Air temperature entering and surrounding indoor portion ofunit

....... 80 F [26.7°C] dry bulb,

. 75 F [23.9°C] wet bulb Air temperature entering outdoorportion of unit

................80 F [26.7°C] dry bulb, 75 F [23.9°C] wet bulb6.4.2 Procedure. After establishment of the specified temperature conditions, the unit shall be operated continuously for a period offour hours. 6.4.3 Requirements. During the test, no condensed water shall drip, run, or blow offfrom the unit. 6.S Condesate Disposal Test-- (Cooling). (Notrequired for heating-only units). Heat pumps shall be designed and produced to pass the following condensate disposal test when operating with air quantities as determined with 0 in. water HG. [0 Pal static difference between air inlets and outlets ofunit, and with controls and dampers set to produce condensate at the maximum rate, provided such settings are not contrary to the manufacturer's instructions to the user. 6.5.1 Temperature Conditions. Air temperature entering and surrounding indoor portion ofunit

...............80 F [26.7°C] dry bulb, 75 F [23.9°C] wet bulb Airtemperature entering

outdoorportion of unit

.............. 80 F [26.7°C] dry bulb, 75 F [23.9°C] wet bulb6.5.2 Procedure. After establishment ofthe specified temperature conditions, the heat pump shall be startedwith its condensate collection pan filled to the overflow point and shall be operated continuouslyforfour hours afterthe condensate level has reached equilibrium.

*The wet bulb temperature condition is not required when testing aircooled condensers which do not evaporate condensate. **Thistest may berunconcurrentlywith the Insulation EfficiencyTest· (See 6.4). 6.5.3 Reqlliremems. Duringthe four-hour test and after the unit is turned off. there shall be no dripping. running-off. orblowing-offofmoisture from the unit. 6.6 AirInfiltration Test. Packaged terminalheatpumps shall be designed and produced to prevent excessive infiltration of outdoor air through the equipment and through its weather seals.
6.6.1 Conditions. Indoor and outdoor air temperatures

........ 70-80 F [21.1-26.7°C] dry bulb Indoor static pressure
...... 0.1 in water HG. [24.9 Pal , below outdoor static pressure Ventilation dampers

.................. closed Cooling and heating means (including fans)

................ .. ............ not operating
6.6.2 Procedure. The equipmentshallbeinstalled in a facility suitabletodeterminethe**ai~**infiltration quantity.

. 6.3.3 Requirements. The measured air flow rate cfm [Us] leading into the indoor portion shall be considered to be the infiltration rate through the equipment and shall not exceed 2 cfm perfoot [3.1 

### Us per m] ofperimeter ofthe wall sleeve where it normally projects through the wall.
6.7 Tolerances. The conditions for the tests outlined in 6.2. 6.3, 6.4. 6.5 and 6.6 are average values subject to tolerances of ± 1.0 F [0.555°C] for wet-bulb and drybulb temperatures. and ± 1.0percent ofthereading for voltages.

Section 7. Voluntary Conformance
7.1 Conformance. While conformance with this standard is voluntary, conformance shall not be claimed or implied for products or equipment within its Purpose (Section 1.) and Scope (Section 2.) unless such claims meet all ofthe requirements of the standard.

5 "