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ComPac 6/09-18

1.9 e

ConoMizer

oMponenTs

ii a/C o

nly

)

Damper Actuator:

The damper actuator is a 24V motor that modulates the position of the damper blade. It is capable

of driving a full 90 degrees within 90 seconds. The assembly has a spring return to close the damper

during power outage.

Controls:

The economizer is controlled by the H205A enthalpy control

or optional dry bulb sensor.

H205A Economizer Changeover Control:

The H205A enthalpy controller responds to the total heat content of the outdoor air to provide changeover

to outside air for free cooling. The change point (factory set at "D") is adjustable from 53°F @ 50%

RH (full counterclockwise) to 78°F @ 50% RH (full clockwise). Refer to Figure 4 and Figure 5.
Once the H205A has selected outside air, the mixed air sensor will limit the air temperature delivered

to the space by modulating the damper blade to "mix in" a quantity of inside air to provide a constant

50° to 56°F. (Adjustable minimum potentiometer, part number 70012, is optional.)

Figure 4. H205A Temperature Control Points

CONTROL

CONTROL POINT*

CURVE

AT 50% RH

72°F/23°C

68°F/20°C

63°F/17°C

58°F/14.5°C

Full CCW is 55°F

*Approximate Deg.

Содержание ComPac I AVP24

Страница 1: ... and ComPac II Air Conditioner Product Manual Vertical Wall Mount Air Conditioners with Front Control Box Panel Models AVP24 30 36 42 48 60 72 P 81024 6 09 18 supersedes 10 07 17 Manufactured By Marvair Division of AIRXCEL Inc P O Box 400 Cordele Georgia 31010 156 Seedling Drive Cordele Georgia 31015 229 273 3636 Fax 229 273 5154 E mail marvairtech airxcel com Internet www marvair com ...

Страница 2: ...GHT Laying it down on its side may cause oil to leave the compressor and breakage or damage to other components 3 TURN ELECTRICAL POWER OFF AT THE breaker or fuse box BEFORE installing or working on the equipment LINE VOLTAGES ARE HAZARDOUS or LETHAL 4 OBSERVE and COMPLY with ALL applicable PLUMBING ELECTRICAL and BUILDING CODES and ordi nances 5 SERVICE may be performed ONLY by QUALIFIED and EXPE...

Страница 3: ...th LL357D4 31 Chapter 4 Troubleshooting 4 1 Overview 32 4 2 Failure Symptoms Guide 32 4 3 Compressor Troubleshooting 33 4 4 Control Board Diagnosis 34 WARNING If the information in these instructions are not followed exactly a fire may result causing property damage personal injury or loss of life Read all instructions carefully prior to beginning the installation Do not begin installation if you ...

Страница 4: ...oint Adjustment 17 Figure 6 Fresh Air Hood Installation 22 Figure 7 Wall Mounting Detail ComPac A C AVP24 72 23 Figure 8a Thermostat Wiring Details 27 Figure 8b Thermostat Connection Diagram 28 Figure 8c LL357D4 Wiring Detail 28 Figure 8d CommStat 3 Wiring Detail 29 Tables Table 1 CFM External Static Pressure 6 Table 2 Ship Weight 6 Table 3 Standard Filter Size 6 Table 4 Minimum Clearances 19 Tabl...

Страница 5: ...ionandservice Majorcomponents are accessible for service beneath external panels All units have internal disconnects optional on 460V Depending upon state and local code require ments this feature may eliminate the need for an external breaker or disconnect The ComPac I A C has a 0 15 manual outside air damper and the ComPac II A C has a factory installed economizer for 100 free cooling with outsi...

Страница 6: ... 48 1900 1830 1760 1700 1620 60 1900 1830 1760 1700 1620 72 2100 1950 1800 1730 1660 24 30 36 42 48 60 72 MODEL LBS KG LBS KG LBS KG LBS KG LBS KG LBS KG COMPAC I A C 274 125 355 160 495 225 521 240 535 245 625 284 COMPAC II A C 286 130 365 170 527 240 552 250 565 260 640 290 MODEL 24 30 36 42 48 60 72 FILTER SIZE inches 16 x 25 x 2 16 x 30 x 2 22 x 36 1 2 x 2 18 x 24 x 2 FILTER SIZE mm 406 x 635 ...

Страница 7: ... ComPac 6 09 18 Figure 1b ComPac I A C ComPac II A C Dimensions Models AVP42 60 in inches Figure 1a ComPac I ComPac II A C Dimensions Models AVP20 36 in inches ...

Страница 8: ... ComPac 6 09 18 Figure 1c ComPac I A C ComPac II A C Dimensions Models AVP72 in inches mm ...

Страница 9: ... ComPac II A C Only The economizer is a regulated damper system with controls The damper regulates the circulation of outside air into the enclosure when the outdoor air conditions are suitable to reduce the need for mechanical cooling save energy and extend compressor life Depending upon the options selected the damper responds to the enthalpy of the outdoor air On a call for cooling from a space...

Страница 10: ...he ComPac air conditioners are factory wired to be normally open Delay on Break If the compressor is de energized due to a loss of a cooling Y call or the first fault the unit re start will be delayed 3 minutes from the time the contactor is de energized Note There is no delay on break if the lockout condition is reset Delay on Make On initial power up only the unit will wait 0 03 to 10 minutes fr...

Страница 11: ...refrigerant pressure rises to 400 PSIG AVP60 setting is 450 PSIG This protects the unit if airflow through the condenser is blocked or if the outdoor fan motor fails Although the contacts of the high pressure switch close when the refrigerant pressure falls to approxi mately 300 PSIG the system must be manually reset once the lockout relay is activated A manual reset is necessary to prevent harmfu...

Страница 12: ...esistant fasteners sealed condenser fan motor protective coating applied to all exposed internal copper in the condenser section and a protective coating on the condenser coil Stainless Steel Cabinet ComPac I A C Only All sheet metal constructed of stainless steel Hot Gas Bypass ComPac I A C Only Used in specialty applications i e Magnetic Resonance Imaging MRI buildings to prevent magnetic voltag...

Страница 13: ...lance including phase loss and phase reversal An LED indicator glows when all voltages are acceptable Automatically resets when voltages and phases are within operating tolerances Dirty Filter Indicators Adiaphragm type of indicator measures the air pressure on either side of the filter and when the pressure drops below the set point an LED is illuminated Minimum Potential Potentiometer Used in th...

Страница 14: ...14 ComPac 6 09 18 Figure 3a Typical Electrical Schematic ComPac I A C Models AVP24 72 with Electronic Control Board 5 6 TRANSFORMER ...

Страница 15: ...15 ComPac 6 09 18 5 TRANSFORMER OPTIONAL FIELD INSTALLED 270 OHMS MINIMUM POSITION POTENTIOMETER Figure 3b Typical Electrical Schematic ComPac II A C Models AVP24 72 with Electronic Control Board ...

Страница 16: ...etotalheatcontentoftheoutdoorairtoprovidechangeover to outside air for free cooling The change point factory set at D is adjustable from 53 F 50 RH full counterclockwise to 78 F 50 RH full clockwise Refer to Figure 4 and Figure 5 Once the H205A has selected outside air the mixed air sensor will limit the air temperature delivered to the space by modulating the damper blade to mix in a quantity of ...

Страница 17: ...the enthalpy and mixed air sensors The controller is designed to maintain the supply air temperature between 50 to 56 F by mixing warm indoor air with cooler outdoor air On a call for cooling from the wall mounted thermostat if outdoor conditions are suitable the controller will open the damper and admit outside air i e economizer cooling If the outdoor ambient is too hot or humid the controller w...

Страница 18: ... General 1 Inspect unit for completeness Check for missing parts e g hardware Refer to the installation kit information in section 2 3 2 Remove access panels and check for loose wires Tighten screw connections 3 Complete and mail the warranty registration card You must consider all of the following when choosing the installation site 1 Noise Install the unit so that the least amount of noise will ...

Страница 19: ...d installed in accordance with all applicable safety codes and standards Marvair strongly recommends referring to the current edition of the National Fire ProtectionAssociation Standards 90Aand 90B before designing and installing duct work The duct system must be engineered to insure sufficient air flow through the unit to prevent over heating of the heater element This includes proper supply duct...

Страница 20: ...m Return Grill for AVP42 48 60 72 06777 Start Relay and Capacitor for AVP24 36 Field Installed Not recommended for scroll compressors Additional Items Needed Additionalhardwareandmiscellaneoussupplies notfurnishedbyMarvair areneededforinstallation For example the list below contains approximate quantities of items typically needed for mounting a unit on a wood frame wall structure Concrete or fibe...

Страница 21: ...eater element This includes proper supply duct sizing sufficient quantity of supply registers adequate return and filter area Ductwork must be of correct material and must be properly insulated Duct work must be constructed of galvanized steel with a minimum thickness of 019 inches for the first three feet Ductwork must be firmly attached secured and sealed to prevent air leakage Do not use duct l...

Страница 22: ...TOTAL STATIC MINIMUM FILTER AREA 24 30 2 25 sq ft 30 36 40 3 00 sq ft 42 48 60 72 50 3 90 sq ft 2 6 Bracket Installation AVP24 72 1 Models AVP24 72 have built in mounting flanges 2 Apply a bead of silicone sealer on the wall side of the bottom support brackets on the unit Circle the mounting holes with the silicone bead 3 Refer to Figure 7 Attach the bottom support bracket to the wall using approp...

Страница 23: ...lifting device or by some other means the bracket alone is not sufficient 3 Make sure that the duct flanges are properly aligned with the wall opening Adjust as necessary 4 Note the holes in each side flange Using the holes for guides drill holes through the wall with a 3 8 drill bit Insert the 3 8 x 5 bolts through the flanges Install nuts and washers on the inside of the shelter Tighten the bolt...

Страница 24: ...rent draw when compared to tabulated values Marvair units have either a reciprocating or scroll compressor A reciprocation compressor is standard on the AVP24 30 36 units However a scroll compressor is an option on these ComPac I and ComPac II air conditioners Units with scroll compressors have a U in the model number The scroll compressor is standard on all AVP42 48 60 72 units There is no negati...

Страница 25: ... assembly See Figure 8d for connections to various thermostats 2 Mount the thermostat on the wall of the shelter The thermostat should be located so that the sup ply air from the unit does NOT blow directly on to the thermostat Connect the thermostat to the terminal block in the ComPac air conditioner as shown in Figures 8a and 8b 3 On dual units refer to the Marvair LL357D4 Lead Lag Controller Sp...

Страница 26: ... of degrees between the set point temperature and the turn on temperature 1ºF to 3ºF 5ºC to 1 5ºC Second Stage Temperature Differential number of degrees between when stage 1 turns on and when stage 2 turns on 1ºF to 6ºF 5ºC to 3 0ºC Minimum Cool Temperature Set Point Adjustable from 45ºF to 75ºF 7ºC to 24 0ºC Maximum Heat Temperature Set Point Adjustable from 55ºF to 90ºF 13ºC to 32 0ºC Staged OF...

Страница 27: ...ntroller A C s do not have O G R W Y 2 4 6 8 10 1 3 5 7 9 5 WIRE WALL THERMOSTAT Five 5 Conductor Color Coded 18 Gauge Thermostat Cable Field Supplied COMPAC A C TERMINAL BLOCK NOTE Terminals 5 7 are normally open dry contacts and close to indicate lockout Terminals 6 7 are normally closed dry contacts and open to indicate lockout Terminals on thermostat may have RC RH If so install jumper wire be...

Страница 28: ...TAT CONNECTION DIAGRAM FOR MARVAIR MODPAC II XCELPAC ALL COMPAC AIR CONDITIONERS POWER FAN COMPRESSOR 1 ST STAGE HEAT COMMON LOW VOLTAGE TERMINAL BOARD LOW VOLTAGE TERMINAL BOARD THERMOSTAT PART NUMBER 50121 SC2010 SL 50123 SC5011 SL 50107 SC5811 SL MODPAC II ALL COMPAC UNITS R G Y1 W1 C Y2 W2 Rc RH G Y W C O B 50124 SC3001 Figure 8b Thermostat Connection Diagram ...

Страница 29: ...FACTORY INSTALLED 1 24 VAC connections only 2 For immediate shutdown of air conditioner upon a signal from the smoke alarm the jumper between terminals 8 and 10 in the ComPac I and ComPac II units must be removed and a jumper placed from terminals 8 and 3 3 When connecting a smoke alarm to the smoke alarm input terminals normally closed remove the factory installed jumper wire and install the smok...

Страница 30: ... check the system operation under different ambient conditions the air temperature and enthalpy sensors must be tricked When outdoor ambient conditions are higher than the control setting a component cooler aerosol may be sprayed directly into the enthalpy sensor to simulate low enthalpy conditions causing the economizer damper to open Alternately when outdoor conditions are lower than the set poi...

Страница 31: ...mes on with the lead unit the light for the lag unit will not come on You should never have all 3 lights on at one time Allow the units to run for 2 to 3 minutes then check the temperature differential between the return air and the supply air with digital thermometer The temperature differential should be between 12 and 20 degrees depending on ambient temperature Next slowly raise the cooling tem...

Страница 32: ...entwhenservicingtheComPac A C Useonlysafe and proven service techniques Use refrigeration goggles when servicing the refrigeration circuit WARNING The refrigerant circuit has hot surfaces and the electrical voltages inside of the unit may be hazardous or lethal SERVICE MAY BE PERFORMED ONLY BY QUALIFIED AND EXPERIENCED PERSONS Chapter 4 Troubleshooting 4 2 Failure Symptoms Guide PROBLEM SYMPTOM LI...

Страница 33: ...llary tube assembly 3 Evacuate and recharge to factory specifications 4 Checklimitcutoutpressures Controlissettoactuateat approximately35PSIG lowpressure and400PSIG high pressure D Unit blows fuses or trips circuit breaker 1 Inadequate circuit ampacity 2 Short loose or improper connection in field wiring 3 Internal short circuit Loose or improper connection s in unit 4 Excessively high or low supp...

Страница 34: ...the lockout fault The control board will enter into and indicate lockout if either of the fault conditions LPS or HPS occur twice The contactor must be closed before the first fault condition can be recognized by the control board The contactor will be closed 3 minutes after the unit is energized and only if cooling is required The first fault condition will open the contactor and shutdown the uni...

Страница 35: ...sure the unit has dried before restarting Condenser Periodically inspect the outdoor condenser coil and the cabinet air reliefs for dirt or obstructions Remove foreign objects such as leaves paper etc If the condenser coil is dirty it may be washed off with a commercial solvent intended for this purpose TURN OFF POWER BEFORE CLEANING Be sure that all electrical components are thoroughly dry before...

Страница 36: ...nder this warranty Marvair will honor its warranty and furnish the required replacement part All costs for shipment and risk of loss during shipment of the product to Marvair and back to the owner shall be the responsibility and liability of the owner Upon written request by an owner Marvair may arrange for remote diagnosis of the allegedly defective or malfunctioning product or part but all costs...

Страница 37: ...the required replacement Any transportation related service labor diagnosis calls filter driers and refrigerant are not included The owner of the product may ship the allegedly defective or malfunctioning product or part to Marvair at such owner s expense and Marvair will diagnose the defect and if the defect is covered under this warranty Marvair will honor its warranty and furnish the required r...

Страница 38: ...an be found on our web site at www marvair com Click on the Service and Parts in the menu on the left hand side of the Home page From the drop down menu select Exploded Views Once here you can select your air conditioner or heat pump The units are grouped by model and by the refrigerant R 22 or R 410A ...

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