Desert Aire ExpertAire LC Series Installation And Operation Manual Download

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Installation and Operation Manual

• Meets AHRI Standard 910.

• Effective humidity control:

4 to 100 lbs per hour.

• Wide range of ambient

temperatures: 65° to

95° F.

• Air conditioning option.

• Optional outdoor air

intake to help meet

ASHRAE 62 ventilation

requirements.

• Multiple heat sink options

including pool water

heating.

• Scroll compressors for

high efficiency and

longevity.

• Galvanneal cabinet with

high impact, powder coat

textured paint.

• Auxiliary heat including

hot water and electric

coils.

LC System

LV System

Summary of Contents for ExpertAire LC Series

Page 1: ...95 F Air conditioning option Optional outdoor air intake to help meet ASHRAE 62 ventilation requirements Multiple heat sink options including pool water heating Scroll compressors for high efficiency and longevity Galvanneal cabinet with high impact powder coat textured paint Auxiliary heat including hot water and electric coils LC System LV System ...

Page 2: ...2 ...

Page 3: ...with each unit and or other documentation provided 2 The Start Up Report must be completed and returned to Desert Aire Service for evaluation If no deficiencies are identified a Warranty Validation Letter will be issued that provides all warranty dates and coverage If installation or start up deficiencies are present these must be corrected and communicated to Desert Aire in order to activate warr...

Page 4: ...om this warranty Some states do not allow the exclusion of incidental or consequential damages for personal injury so the above limitations may not apply to you for certain damages This warranty gives you specific legal rights and you may also have other rights which vary from state to state No person or representative is authorized to make any warranty or assume any liability not strictly in acco...

Page 5: ...5 Desert Aire LC LV Manual ...

Page 6: ...d possible death or injury Indicates an imminently hazardous situation which if not avoided will result in death or serious injury Indicates a potentially hazardous situation which if not avoided could result in death or serious injury Indicates a potentially hazardous situation which if not avoided could result in minor or moderate injury Caution used without the safety alert symbol indicates a p...

Page 7: ...sor 25 2 8 Auxiliary Heating Control Wiring 25 2 8 1 Auxiliary Heating Dry Contact Closure 25 2 8 2 Auxiliary Heating Proportional Signal 26 2 9 Smoke Alarm Interlock 26 3 Start up Procedure 27 3 1 Preliminary Inspection 27 3 2 Outdoor Air Applications 28 3 2 1 Outdoor Air Option Equipped Units 28 3 2 2 Standard Systems in Conjunction with Outdoor Air 30 3 2 3 Outdoor Air Supplemental Information ...

Page 8: ...geration System Pressures 52 5 3 3 Temperature Rise or Drop Across Unit 52 5 4 Sequence of Operation 53 5 4 1 Dehumidification and Air Reheat 53 5 4 2 Dehumidification and Air Cooling 53 5 4 3 Cooling and Water Heating Water Cooled Unit Only 53 5 4 4 Dehumidification and Water Heating Water Cooled Unit Only 53 5 4 5 Partial Pool or Spa Water Heating 54 5 4 6 Operation of Water Condensers and Optio...

Page 9: ...omptly fill out and return the form Carriers may deny claims that you have not filled out within a week of delivery Notify Desert Aire of any damage 1 3 Rigging 1 Failure to observe rigging instructions may lead to equipment damage personal injury or death 2 Lifting method and procedure must comply with all local and national codes and regulations 3 The use of safety slings in addition to lifting ...

Page 10: ...ondenser to verify that it is properly balanced Figure 1 Typical Rigging for an Optional Remote Condenser 1 Do not lift the remote condenser by its refrigeration headers or return bends 1 Do not tip the dehumidifier on its side 2 Avoid dropping the unit down stairways or subjecting it to severe mechanical shock Desert Aire LC LV Manual ...

Page 11: ...hes of clearance Consult local state and national electric codes for other minimum service clearances Install the unit on a sturdy level mounting base or platform that will prevent vibration and sound transmission Never install the dehumidifier on a wooden platform without consulting the design engineer for spring isolation requirements and sound control materials Do not install the unit near occu...

Page 12: ...d space or where ambient temperatures can fall below 45 F If you must install the dehumidifier outside or in an unconditioned space such as an attic you must use an outdoor rated dehumidifier Desert Aire equips outdoor rated dehumidifiers with weatherproofing and thicker insulation You can determine whether your dehumidifier is outdoor rated by inspecting the unit rating plate See section 5 6 for ...

Page 13: ... Only 02 LC Only 03 04 05 06 08 10 LC Only 12 LC Only 15 LC Only External Static Pressure ESP digit 9 for LC D E F N P R digit 10 for LV B F 1 0 WC External Static Pressure ESP digit 9 for LC G H J S T U digit 10 for LV C G 1 5 WC Figure 4 LC and LV Series Standard Unit Airflow Specifications Select the grilles registers and diffusers for low static pressure loss required throw distance and the sp...

Page 14: ...ING VANES IN ALL ELBOWS INSULATED OUTSIDE AIR INTAKE DUCT SIZE FOR CODE REQUIREMENTS MOTOR OPERATED DAMPER WEATHER PROOF INTAKE HOOD REMOTE CONDENSER TEMPERATURE AND HUMIDITY CONTROLS MECHANICAL EXHAUST WITH BACK DRAFT DAMPER WALL OR ROOF MOUNTED NOTE EXHAUST LOW Figure 5 Basic Pool Room Layout Desert Aire LC LV Manual ...

Page 15: ...LE LOCATE AS HIGH AS POSSIBLE RETURN AIR DUCT DESERT AIRE DEHUMIDIFIER SKYLIGHT FLEXIBLE DUCT CONNECTIONS POOL DECK ANODIZED ALUMINUM CEILING DIFFUSER ANODIZED ALUMINUM SIDEWALL REGISTER VAPOR BARRIER ANODIZED ALUMINUM RETURN AIR GRILLE LOCATE AS HIGH AS POSSIBLE RETURN AIR DUCT FLEXIBLE DUCT CONNECTIONS Figure 6 Soffit Duct Layout ...

Page 16: ... CONDENSATE PIPING Figure 7 Under Floor Duct Layout 2 3 Condensate Drain Piping The condensate drain connection may be on the side or the bottom of the dehumidifier depending on the size and style of cabinet used Use concrete blocks or steel dunnage to raise the dehumidifier high enough above the floor to provide clearance for the field supplied condensate drain trap Note While the supply blower r...

Page 17: ...irements Trap the condensate as shown in Figure 9 The P trap dimensions in Figure 9 are sized for a maximum return air static of 2 0 of water If your return air static exceeds this specification consult Desert Aire for help in resizing the P trap You may also need to install a cleanout tee or plug near the trap Note that the drain opening in the drain pan is off center to simplify its cleaning and...

Page 18: ...r source other than a pool or a spa such as a chilled water loop the required flow rate has been printed on a label affixed near the water line stubs of the dehumidifier 01 LC Only 02 LC Only 03 04 05 06 08 10 LC Only 12 LC Only 15 LC Only Water Flow Rate and Pressure Drop Pool Application 2 GPM 5 5 ft W C 4 GPM 6 9 ft W C 6 GPM 5 3 ft W C 8 GPM 6 1 ft W C 10 GPM 5 7 ft W C 12 GPM 9 2 ft W C 16 GP...

Page 19: ...ack Assembly with Filters 7 Return Air 8 Vibration Isolators 9 P Trap 10 Base If Required LEGEND 11 Check Valve 12 Ball Valve 13 Flow Meter 14 Main Pool Heater 15 Auxiliary Pump 16 Filter Assembly 17 Main Pool Pump 18 Water Temp Sensor Dry Well 19 Water Inlet 20 Water Outlet Figure 11 Proper Pool Water Heating Installation for Desert Aire LC and LV dehumidifiers ...

Page 20: ...20 Figure 12 Proper Pool Water Heating Installation for Desert Aire LV dehumidifiers Desert Aire LC LV Manual ...

Page 21: ... installation requirements LC and LV dehumidifiers installed with remote condensers may require additional oil and refrigerant charge at the time of field installation For reference the factory charge of the dehumidifier is shown in Figure 13 Additional field installed charge is shown for each unit size allowable line length and remote condenser for standard units are shown in Figures 14 and 15 No...

Page 22: ...RC5S063CXXXXXXX 23 9 28 9 N A N A RC5S079CXXXXXXX 34 2 37 9 N A N A RC5S079CXXXXXXX 34 2 38 6 N A N A RC5S079CXXXXXXX 34 2 41 7 47 2 52 8 RC8S015CXXXXXXX 47 5 54 6 N A N A RC5S032CXXXXXXX 13 3 15 6 17 8 N A RC5S099CXXXXXXX 36 0 40 4 N A N A RC8S015CXXXXXXX 47 1 54 6 N A N A 0 25 26 50 51 75 76 100 0 25 26 50 51 75 76 100 0 25 26 50 51 75 76 100 0 25 26 50 51 75 76 100 0 25 26 50 51 75 76 100 0 25 ...

Page 23: ... 0 25 26 50 51 75 76 100 0 25 26 50 51 75 76 100 0 25 26 50 51 75 76 100 0 25 26 50 51 75 76 100 0 25 26 50 51 75 76 100 0 25 26 50 51 75 76 100 0 25 26 50 51 75 76 100 0 25 26 50 51 75 76 100 0 25 26 50 51 75 76 100 7 8 1 1 8 1 1 8 1 1 8 7 8 1 1 8 1 1 8 1 1 8 1 1 8 1 1 8 1 3 8 1 3 8 5 8 5 8 3 4 3 4 5 8 3 4 3 4 3 4 5 8 3 4 7 8 7 8 Line Length ft Line Diameter In OD Discharge Line Liquid Line R 410...

Page 24: ...lock For a single phase unit the motors must be re wired according to the wiring diagrams included with the motor To assist in compliance with NEC and local codes a second lug connected to the service panel in equipment with pool water condensers is provided This lug is intended to be connected to the pool equipotential bonding grid in the field when required by code This also removes the possibil...

Page 25: ...ting pipes warm air ducts supply register outlets or solar radiation Cold spots due to a cold wall or drafts from stairwells doors windows or supply register outlets Dead spots such as behind doors or in corners where room air cannot circulate freely 2 7 2 Duct Mount Sensor The duct mount sensor is normally used in applications where continuous blower operation is desired A duct mount sensor helps...

Page 26: ...ave two terminals for 24 VAC power and two terminals for the signal input Three terminal valves have one terminal for the hot 24 VAC input a second terminal for the positive signal input and a third common terminal for the neutral 24 VAC input and the negative signal input You must follow the instructions included from the valve manufacturer Observe the proper polarity or you may damage both the v...

Page 27: ...emove wooden shipping blocks found beneath compressor s Before starting unit remove shipping restraining brackets on supply blower equipped with a spring isolation base if applicable Make sure that the unit is level and securely mounted so that it cannot shift or transmit vibration to the building Verify that the incoming power supply matches the rating plate of the dehumidifier The available powe...

Page 28: ... passages of optional heating coils or water side heat exchangers Check the drain pan and the condensate piping Test the drain and prime the p trap by pouring water into the drain pan Verify that all service valves in the refrigeration lines are fully open 3 2 Outdoor Air Applications 3 2 1 Outdoor Air Option Equipped Units Construction codes often require you to introduce outdoor air into a comme...

Page 29: ... Size the exhaust blower to maintain the dehumidified room at a neutral or slightly negative pressure You must install the outdoor air intake away from any sources of airborne contamination such as exhaust fans or plumbing vents You must also filter the outdoor air before it comes in contact with any coils Insects and debris in the unfiltered air will rapidly clog the dehumidifier s reheat condens...

Page 30: ... system it is advised that the intake and exhaust be connected directly to the space being conditioned SYSTEM FAILURES CAUSE BY IMPROPER OUTDOOR AIR INSTALLATIONS ARE NOT COVERED BY WARRANTY Outside Air Ductwork with 0 20 0 45 wc Pressure Drop LC Dehumidifier Supply Air Electrical Panel Terminal Strip Outside Air Pre Heater Return Air Outside Air Air Filter Motorized Outside Air Damper to connect ...

Page 31: ...ating is Required Desert Aire systems require that outdoor air be pre heated if mixed air temperatures inside the unit may fall below 45 F To determine if an application requires outdoor air pre heating the following study needs to be conducted 1 Determine the following Design return air temperature For pool rooms typically 82 F Outdoor air winter design temperature Use values as specified by desi...

Page 32: ...the exterior of the duct during winter months LC EXAMPLE LC05 2300 system CFM pool room application 500 CFM of outdoor air Location Minneapolis Minnesota Winter Temp 16 F MAT 16 F x 500 82 F x 2300 500 60 7 F 2300 2300 CONCLUSION No need for outdoor air pre heat LV EXAMPLE LV05 3000 system CFM pool room application 500 CFM of outdoor air Location Minneapolis Minnesota Winter Temp 16 F MAT 16 F x 5...

Page 33: ...d averaged Proper LACFM total system airflow must be confirmed prior to this procedure This is done by achieving specified airflow pressure drop across the reheat coil See section 3 3 for details EXAMPLE 1 Determine how much OACFM is entering an LC05 Measured LACFM 2300 LATEMP 73 F RATEMP 82 F OATEMP 40 F Solution OACFM 2300 x 73 F 82 F 40 F 82 F 490 CFM 3 3 Airflow Balancing To ensure code compli...

Page 34: ...d the rating printed on the rating plate If the blower motor current draw exceeds its rating but your airflow is still too low the static pressure losses in the ductwork and grilles may be higher than the unit was designed for If this happens consult the Desert Aire Service Department 262 946 7400 Prior to any call to the Desert Aire Service Department please have the unit serial number and model ...

Page 35: ...dicated in Figure 26 Adjust the evaporator bypass damper opening by using the control interface to adjust the Evap Unocc damper setting This is located in the DAMPER SETTINGS menu under the SERVICE MENU Adjusting the value to a greater percentage will open the damper and decrease the pressure differential Adjusting the value to a lower percentage will close the damper and increase the pressure dif...

Page 36: ...or exhaust air are application specific Refer to the mechanical equipment schedule or other indication from the building designer for required flow rates Poolroom applications will require the exhaust air flow rate to be greater than the outdoor air to maintain a negative static pressure in the space 3 3 3 Airflow Balancing for LV Dehumidifiers The LV series has static pressure sensors up and down...

Page 37: ...4 0 26 0 15 0 17 0 20 0 22 0 29 0 31 0 38 0 40 0 27 0 29 0 43 0 45 0 40 0 42 Condenser Coil Hot Water Coil Pressure Drop Range Inches W C 0 25 0 27 0 43 0 45 0 34 0 36 0 24 0 26 0 30 0 32 0 43 0 45 0 57 0 59 0 39 0 41 0 71 0 73 0 69 0 71 03 04 05 06 08 Total System CFM 1500 2100 3000 3400 3800 Model LV Only Condenser Coil Pressure Drop Range Inches W C 0 24 0 26 0 18 0 20 0 32 0 34 0 37 0 39 0 44 ...

Page 38: ...e unit is commissioned The design and processing of the field piping is just as important as the factory piping in ensuring the longevity of the system Selection of quality components quality procedures and full testing help to ensure the sealed system failures are minimized wherever possible Nonetheless the mechanical nature of many components creates some unforeseen wear and failure in certain i...

Page 39: ... rare defective or damaged Schrader valve cores can contribute to refrigerant loss Charge systems only by weight after servicing Review the rating plate and any field charge labels When servicing additional liquid line filter dryers and suction filters may be required This does not apply to installation of remote condensers Charge refrigerant blends including R 410A and R 407C with liquid only Cha...

Page 40: ...imed with water Verify that it drains freely with no leaks If the drain is outside or in an unconditioned space make sure it has been heat traced If you installed a condensate pump make sure it operates properly Check the operation of the remote condenser on units equipped with this option Make sure that the fans cycling switches which are mounted on the condenser are correctly piped and have been...

Page 41: ... air volume Check the operating pressures of the refrigeration circuits Check the current draw of each blower motor Check the current draw of each compressor Lubricate the blower motor s Lubricate the blower bearings FINA SHELL ESSO MOBIL Type Marson HTL 3 Alvania Fett 3 Beacon 3 Mobilux EP3 Supplier Base Lithium Lithium Lithium Lithium Range temperature min max 30 C 120 C 20 C 130 C 20 C 130 C 30...

Page 42: ...l levels in the pool can be dangerous to users and can damage pool hardware including the dehumidification system SERVICE PROBLEMS CAUSED BY EXCESSIVE CHEMICAL LEVELS ARE NOT COVERED UNDER WARRANTY Desert Aire LC LV Manual ...

Page 43: ...y need to consult with other contractors who have worked on different portions of this project The following list will help you diagnose some of the most obvious symptoms of a system which does not work properly 4 1 The Blower Does Not Run POSSIBLE CAUSE System terminal switch in open position Loss of main power Blower overload has tripped Faulty control wiring REMEDY Close system terminal switch ...

Page 44: ...r or check fuses on three phase units B or C Replace Compressor Wait 3 minutes for timer 4 3 Evaporator Coil Ices Up POSSIBLE CAUSE Entering air below 70 F Faulty or improperly set hot gas bypass valve Insufficient evaporator airflow rate Lack of refrigerant Restrictive filter drier Defective expansion valve Restriction in refrigeration piping REMEDY Raise entering air temperature 1 Set hot gas va...

Page 45: ...2 Check for dirty filters or restricted ductwork 3 Verify that coils are clean Re evaluate system charge Evaluate or purge system Check 3 way flooding solenoid and check valves for sticking 1 Check coil and tubing for kinks 2 Replace dirty drier filter 1 Reduce entering air temperature or relative humidity 2 Check register locations for short cycling of air Evaluate water flow rate for your applic...

Page 46: ...icient water flow This can be caused by an undersized pump insufficient water diversion or restrictions in the water piping such as dirty filter s This would also lead to high refrigerant discharge operating pressures in the water heating mode POSSIBLE CAUSE Air and pool water temperature imbalance Poor air distribution Unit airflow is too high Unit is undersized UNITS EQUIPPED WITH WALL MOUNTED S...

Page 47: ...itioning and dehumidification applications due to their ability to cope with occasional periods of liquid refrigerant return There are fewer moving parts in a scroll compressor subject to wear compared to alternative compressor designs Nonetheless there are still many mechanical and electrical parts with close tolerances Replacement of the compressor may be required during the normal service life ...

Page 48: ...ested for acid and particulate during any compressor replacement For the initial testing the compressor sump should be used to sample the oil Oil can be recovered through the Schrader port on the low point compressor shell or through the suction line connection after the compressor has been removed Use Virginia KMP New Calgon Phase III Sporlan Test All or equivalent oil test where oil is sampled i...

Page 49: ...der fittings Ensure there are access fittings directly upstream and downstream of the suction filter There is typically one fitting installed on the suction filter There may be a bulkhead fitting attached to the compressor suction side Do not use acid neutralizing additives or other chemicals for acid removal The refrigeration system must contain only oil and refrigerant Precipitates of additives ...

Page 50: ...ith standard filter elements Remove outlet screens if they were required by filter manufacturer If the pressure differential across the liquid line filter is 5 PSI or greater replace cores and secondary filter with new components and test at 24 hour intervals until pressure drop is at acceptable levels Once pressure differential is less than 5 PSI remove secondary filter and replace cores Testing ...

Page 51: ...hat the dehumidifier operates efficiently and without problems Undersized or restrictive ducts reduce the system airflow which can cause premature compressor failure Use the following diagrams as a guide when you design the duct system Figure 29 Recommended Duct Designs for Desert Aire dehumidifiers ...

Page 52: ... walls ceilings furniture etc Although the dehumidifier may be capable of regaining control of pool spa room conditions after re start moisture damage to the pool spa room may result from the period when the dehumidifier was disabled 5 3 2 Refrigeration System Pressures Many factors affect refrigeration pressures on a given day Such factors include ambient temperature water temperature airflow vol...

Page 53: ...n setpoint the unit will not energize the compressors This prevents the space from significantly overheating Unit will energize the compressors once the space cools below the cooling setpoint or a heat sink becomes available 5 4 3 Cooling and Water Heating Water Cooled Unit Only When the room air requires cooling and the pool water requires heating a dehumidifier equipped with a pool water condens...

Page 54: ...er cooled condenser option can be configured to create a dry contact closure when water should be flowing through the condenser If the controller has been configured this way the contact to the remote pump will close After flow is established as sensed by the water flow switch the unit will then shift to the appropriate condenser Should flow not be established the unit will shift to the next avail...

Page 55: ... to balance the airflow by using a manometer to measure the static pressure drop of the reheat condenser Refer to section 3 3 on air balancing for further details regarding the balance procedure Be sure to replace the heater differential pressure switch tube connections to these sensors when finished to permit heater operation The higher pressure is between the heat exchangers and the lower pressu...

Page 56: ... compressor can be used to move refrigerant to the system components that will be used to temporarily hold the charge Note that cooling a condenser by running as many fans as possible and or cooling the coil surface with a stream of water can assist in storing charge The low side pressure should be monitored closely while using this procedure to store charge Under no circumstances should a compres...

Page 57: ...n in the air Copper oxides flake easily on the inside of the tubing and dislodge easily when the system is filled with refrigerant and oil The particulate can move throughout the system and cause contamination on valves and other critical components System filters may become fouled Flowing nitrogen into the system and ensuring that the inside of the tube is significantly free from oxygen while bra...

Page 58: ...system leak Review all piping connections and correct before continuing evacuation Pressure rising above 500 microns and tending to stabilize at a higher pressure indicates the system has moisture above specifications Continue evacuation until 500 microns or lower can be held for a minimum of 10 minutes Alternative Evacuation Specified by Process After components have been repaired or replaced eva...

Page 59: ...nergized If this is required the compressors should be energized and the charge should be slowly metered into the suction line as far as possible upstream of the compressor If the unit is equipped with an accumulator the charge needs to be added to the port upstream of this location The bulkhead fittings on the side of the unit should not be used for charge addition Monitor superheat at the compre...

Page 60: ...with the equipment A factory start up includes several key services The expertise of an accomplished factory trained technician who will supervise the commissioning of the equipment The Desert Aire representative will assist the installing contractor with filling out the Start Up Report He will also inspect the installation to make sure that the dehumidifier has been properly integrated with the r...

Page 61: ... following page This report needs to be filled out thoroughly by a qualified service technician and returned to Desert Aire for warranty validation Please ensure that the model and serial number of the unit are noted on this form The model and serial number can be found on the system s rating plate located on or near the electrical compartment service door Failure to complete and return this form ...

Page 62: ...Air balancing equipment Magnehelic or manometer differential pressure gauge q Volt Amp OHM meters in working order q Digital thermometer w clamp on sensors OR laser type temperature probe q 50 of refrigerant weigh in scale q Hand pump for adding oil to compressor Copeland Scroll 9 ton compressor larger R 22 requires 150 viscosity 3 GS mineral oil R 410A requires Copeland s POE Genetron AZ20 Suva 9...

Page 63: ...on Jobsite Address ____________________________________________________________________________ ____________________________________________________________________________ Jobsite Contact ______________________________________ Cell ________________________________ Jobsite Phone ____________________________________________________________________________ Signature Jobsite Supervisor ______________...

Page 64: ...lectrical components and refrigeration under pressure are present Before continuing read the Installation and Operations manual If you do not fully understand the manual contact the Desert Aire Service Department Please be prepared with the model and serial numbers located on the rating plate of the unit Use one start up report per unit Print or type all information If there is not enough space av...

Page 65: ...10A Added LBS Additional Oil Added OZS Flush Cycle Enabled Yes No Fan Cycle Controller Settings Refer to Air Cooled Condenser manual for instructions SENS SN 1 SN 2 SN 3 OUTR1 ON1 OFF1 ONT1 OFT1 SNF1 SENS1 OUTR2 ON2 OFF2 ONT2 OFT2 SNF2 SENS2 OUTR3 ON3 OFF3 ONT3 OFT3 SNF3 SENS3 OUTR4 ON4 OFF4 ONT4 OFT4 SNF4 SENS4 Proper Installation Checklist Installation manual read and understood Tighten all fiel...

Page 66: ... Air Temperature F Room Relative Humidity F Outdoor Air Temperature F Outdoor Relative Humidity F Water Temp main pool F Water temp spa or other F Compressors and Refrigeration in Pool Water Heating Mode Head Pressure Psig Suction Pressure Psig Water Inlet Temperature F Water Outlet Temperature F Compressors and Refrigeration in Reheat Mode Motor Compressor RLA off nameplate amps amps Amperage L1 ...

Page 67: ...Auxiliary Electric Heater Information Signal L1 Amps L2 Amps L3 Amps Discharge Air Temp Electric Heater F Auxiliary Water Steam Coil Information Signal Inlet Temp Outlet Temp Discharge Air Temp Water Coil F F F Compressors and Refrigeration in Cooling Mode Remote Condenser Active Head Pressure Psig Suction Pressure Psig Refrigerant Sight Glass Clear Yes No Superheat F Subcooling F Compressor Oil L...

Page 68: ...or more legs Compressor drawing higher current than design Continuity 0 resistance between two or more legs 3 phase units Compressor drawing locked rotor current Other describe Runs without pumping Pressures _____ _____ Final Determination of Failure Liquid Floodback Low Superheat Debris Defective Expansion Valve Low Sump Oil Insufficient Motor Cooling Other Describe Diagnostic Corrective Action S...

Page 69: ... Circuit B Use both sides for tandem set Motor See wiring schematic for details Discharge Pressure PSIG PSIG PSIG PSIG Liquid Line Pressure At access fitting nearest TXV PSIG PSIG PSIG PSIG Suction Pressure At compressor PSIG PSIG PSIG PSIG Liquid Line Temperature At access fitting nearest TXV F F F F Suction Temperature At Compressor F F F F Refrigerant Sight Glass Condition Clear Intermittent Va...

Page 70: ...2016 03 Optimizing Solutions Through Superior Dehumidification Technology N120 W18485 Freistadt Road Germantown WI 53022 E mail info desert aire com Ph 262 946 7400 Fax 262 946 7401 Website www desert aire com ...

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