Pages from Office Pro 24 Service Manual for Units
Contents
1. 12 EVAPORATOR INLET PIPE 7 __ EVAPORATOR E OUTLET PIPE ASSY CAPILLARY TUBE HIGH PRESSURE SWITCH PIPE Condenser to Capillary Tube CONNECTING PIPE Evaporator to Compressor Attachment Plug Terminal Block Control Board Relay Board Fan Motor Compressor Motor Capacitor for Fan Capacitor for Compressor ELECTRICAL SYSTEM Internal Overload Protector of Compressor Internal Overload Protector of Fan Motor High Pressure Switch Full Drain Warning Switch Freeze Protection Thermistor RTH Room Thermistor Ground J8 AUX1 Auxiliary Connector CPK 5 Relay Board Relay Board Fuse Figure 4 1 Electrical System and Control Box 13 Capacitor ELECTRICAL SYSTEM 1 Basic Operation of Ofice Po 24 Electrical Ciruit There are two basic components used to contr olthe operation of the Classic Plus 26 Electrical System Contr ol Panel Assembly Contr ol Box The Contr ol Panel Assembly contains the Contr ol Panel Contr ol Board with inputs forthe fr eeze and roomtemperatur ether mistors drain switch andamicr oprocessor Fan Only Mode Low Fan Mode Whenthe Low Fan Mode button onthe contr olpanelis pr essed the micr oprocessor turns on the button s LED and activates the Fan On Relay Relay Boar sending line voltage 208 230 VAC to the N C Nor mally Closed contacts of the2. Figure 4 4 Relay Board 15 ELECTRICAL SYSTEM 2 Contiol Box A Capacitors The capacitors ar eused to temporarily boost the power output available to the fan motor and the compr essoratstar t up The specifications ofeachcapacitorar e listed below CAPACITOR VOLTAGE CAPACITANCE APPLICATION RATING uf Fan Motor 440 12 5 Compressor 440 50 B Relay Board The Relay Boar d receives signals and outputs from the contr ol board that contains a micr o processor Therelay boar d contains the compressor fan on and fan mode speed relays Italso contains a step down trans former that converts the line voltage 230 VAC to 16 volts This is then conver ted from AC to DC and used forr elay coil activation The 16V DC poweris sentto the Contr ol Panel Assembly wher eitis fur ther reduced to 5 volts forthe system logic The relay boar d also contains the DIP S witch The DIP Switch is used to changethe Fan Mode operation fr om Stop to Operate and change the SetPointtemperatur e display from T to C NOTE The relay board must be serviced as a complete assembly It has only one serviceable component the fuse a Relay Boar d Fuse NOTE The relay board fuse is the only serviceable component on the relay board assembly This fuse pr ovides pr otection against damage to the step downtransfor mer Itmustbe replaced with the exact type of fuse oran equivalent Fuse Specifications 2 10A 250V ACAUTION F
3. 7 CONDENSER FAN T EVAPORATOR 7 69 j CAPILLARY TUBE K ACCUMULATOR DRAIN TANK 0 CONDENSER CASTER 14 POWER CORD Figure 2 2 Construction Diagram CONSTRUCTION SPECIFICATIONS and DATA 1 Basic Construction The MovinCool Spot Cooling System is compact in construction because the condenser and the evaporator ar e enclosed in one unit The interior is divided into thr ee sections The upperfr ont face is equipped with the evaporator while the lower fr ont face contains the drain tank Ther ear section contains the condenser thecompr essor and the contr ol box 2 Air Flow Air drawn fr om the right side face passes thr ough AIR OUT the condenser which extracts the heat This hot air is blown outthr ough the upper exhaust air duct Airtaken infr om the fr ont face is cooled by the evaporator and then blown thr ough cool air vent Allthe airinlets ar e equipped with filters while the exhaust air ductis protected by wir e mesh COOL AIR OUT imm HT O WG I NY EVAPORATOR AIR IN CONDENS
4. 4 x 47 25 W x D x H mm 538 x 696 x 1200 weight lbs kg 210 95 Operating Conditions inlet air relative humidity 95 352 lt 60 65 F 18 3 50 Control Devices temperature control included programmable timer included two speed fan included Specifications Specifications are subject to change without notice CONSTRUCTION SPECIFICATIONS and DATA 811 575 Figure 2 4 Exterior Dimensions units inches DATA 3 6 14 3 14 25 2 3 2 12 7 15016 g Yer 25 Y E Br B 10 18 0 5 2 8 11 1 y Ps 8 95 F 8 144 2 4 9 5 6 10 8 2 0 7 9 40 50 60 70 Relative Humidity Inlet Air 35 95 ao 86 Cool Air Temperature Difference Curve g 25m 5 T Q 115V 2 2 20 68 15 69 10 15 20 25 ut 50 59 68 77 Wet Bulb Temperature Cooling Capability Curve 1 0 0 8 35 95 Y 30 86 g 25 77 2 3 5 20 68 15 2
5. fan mode r elay This outputis connected to the 5 ter minal elay boar d where the LOW SPEED wir eof the fan motoris connected High Fan Mode When the High Fan Mode button on the contr olpanelis pr essed micr oproces sortur ns on button s LED and activates both the Fan Relay and Fan Mode Relay This sends line voltage 208 230 V AC from Fan On Relay to the N O Nor mally Open contacts of the Fan Mode Relay This outputis connected to 6ter minal Relay Boar d wher e HIGH SPEED wire of the Fan Motoris connected Cool Mode In Addition to Fan Only Mode as described above When the Cool On Of f button onthe contr ol panelis pr essed the micr oprocessortur ns the button s LED and ifthe T emperatur e Set Pointis less than the rentroomtemperatur e activates the Compr es sor Relay Relay Boar d This sends line voltage 208 230V AC to the 4ter minal Relay Boar d where the wir e from the Compr essor wir e harness is connected 14 Relay Board DIP Switch gt a 7 ria N Relay Board Capacitor Figure 4 2 Control Box DIP Switch Temperature Scale Display Switch C Fan Mode Control Switch STOP OPERATE Figure 4 3 DIP Switch Relay Board Fuse
6. 0 25 30 59 68 77 86 Wet Bulb Temperature Power Consumption Curve REFRIGERANT SYSTEM The component pats of the efrigerant system include the following Compressor Evaporator Condenser Accumulator Capillary tube These par ts are all connected by coppertubing All the connections have been brazed EVAPORATOR CONDENSER 09 lt IK CAPILLARY TUBE ACCUMULATOR O COMPRESSOR 2 REFRIGERANT FLOW gt ACCUMULATOR CAPILLARY COMPRESSOR Figure 3 1 Refrigerant System REFRIGERANT SYSTEM 2 Compressor The compr essor used forthe unitis her metically sealed The compr essorand the compr essor motorar ein one casing A CompressorConstr uction The constr uction of ar otary type compr essor is divided into two mechanisms The drive mechanism compr essor motor and the compression mechanism compr essor When the r otor shaft ofthe motor drive mechanism tur ns the roller ofthe compr es sor compr ession mechanism r otates to compress ther efrigerant B Basic Compr essorOperation Theroller compr ession mechanism is set eccentrically with a certain distance given from the axis ofthe center of the cylinder A spring loaded blade is mounted on the cylinder The rollertur ns to compr ess the refrigerant in the space between t
7. ER AIR IN x WW OS SNS Figure 2 3 Air Flow 3 Compressor and Fans The compr essoris her metically sealed A two speed fan motoris used with two centrifugal fans to draw airacr oss the evaporator and condenser 4 Drain Tank The capacity of the drain tank is 5 0 gallons 19 liters The unitis equipped with a T ank Full LED and a device to automatically stop the operation ofthe unit when the draintankr eaches a level of appr oximately 4 0 gallons 15 liters CONSTRUCTION SPECIFICATIONS and DATA Rating Conditions dry bulb wet bulb humidity Specifications power frequency line voltage single phase 208 230V power CONSUMPTION nee 2 7 Kw current consumption 13 1 11 8 Amps power factor starting current power wiring Cooling Unit cooling capability 6 000 Kcal hr 24 000 BTU hr cooling system direct expansion Blower type of fan centrifugal fan air volume Evaporator High speed 632 ft min 1068 m h Condenser High speed 867 ft min 1465 m h motor output FIOR MEET E 0 48 Kw 0 41 Kw Compressor rotary 1 4 Kw refrigerant type R 22 retigerant 2 17 lbs 0 96 kg Safety Devices compressor overload protector included fan motor protector included anti freezing thermistor included full drain tank switch included automatic restart power interruption included compressor time delay program included Dimensions amp Weight WxDxH in 21 2 x 27
8. SERVICE MANUAL OFFICE PRO 24 y NCOOL u A MOV Pioneering New Solutions With Portable Air Conditioning DENSO SALES CALIFORNIA INC REGISTERED TO ISO 9002 FILE NO A5537 2000 DENSO SALES CALIFORNIA INC All rights reserved This book may not be reproduced or copied in whole or in part without the written permission of the publisher DENSO SALES CALIFORNIA INC reserves the right to make changes without prior notice MovinCool is a registerd trademark of DENSO Corporation SERVICE MANUAL OFFICE PRO 24 MOVINCOOL ioneering New Solutions With Portable Air Conditioning FOREWORD This manual has been published to service the MovinCool Office Pro 24 Please use this service manual only when servicing the Office Pro 24 DEFINITION OF TERMS AWARNING Describes precautions that should be observed in order to prevent injury to the user during installation or unit operation A CAUTION Describes precautions that should be observed in order to prevent damage to the unit or its components which may occur during installation or unit operation if sufficient care is not taken NOTE Provides additional information that facilitates installation or unit operation GENERAL PRECAUTIONS AWARNINGS e All electrical work if necessary should only be performed by qualified electric al personnel Repair to electrical components by non certified technicians may result in personal injury and or damage to the un
9. ailure to use the exact type of fuse could result in damage to the unit and or to components It will also void the warranty of the unit ELECTRICAL SYSTEM 3 Fan Motor The fan motor is a single phase induction type two speed motor The motorr otates fans on the evaporatorside and the condenser side atthe same time Specifications Rated Voltage 230 volts 60 Hz Rated Output 480 watts 410 watts 2 CF1 White 4 Compressor Motor CF2 The compr essor motoris a single phase motor It is contained within the same housing as the Green Yellow J 6 High Black compressor Figure 4 5 Fan Motor Specifications Rated Voltage 230 volts Rated Output 1400 Watts NOTE An internal overload relay is used to pro tect the compressor motor and fan motor This relay is built into the compressor motor and fan motor and will interrupt the flow of current when there is an overcurrent situation or if abnormally high temperature builds up in the compressor motor or fan motor 16 ELECTRICAL SYSTEM 6 Drain Switch The Office Pro 24 is equipped with a drain tank switch When the drain tank accumulates appr oximately 4 0 gallons 15 liters of condensate water in the drain tank the drain tank switch sends a signal to the microprocessor The micr oprocessorstops all operation of the unitand flashes the T ank Full LED This system utilizes a 1 250 VAC micr o switch for this function When drain water accumulat
10. antis gt Low Temp Low Press sprayed outthr ough the fixed orifice in the Gas and Liquid Mixture capillar tubes As ar esult the temperatur e and state of the r efrigerant become low and mist like Figure 3 3 Capillary Tube respecitively causing it to evaporate easily 5 Evaporator The evaporator like the condenser is aheat exchanger utilizing plate fins Heatisr emoved from the air being pulled acr oss the evaporator by the centrifugal fan and ther esulting cool air is expelled thr ough the cool air vent From Evaporator 6 Accumulator l n The accumulator is mounted on the suction gas piping between the evaporator and the compr es sor The accumulator separates the liquidr efriger ant from the gas r efrigerant letting only the gas refrigerant enter the compr essor In the accumu lator suction gas is led into a vessel having a cylindrical body and the gas speed is decr eased inside the vessel This separatesther efrigerant 5 contained the gas by the for ce of gravity causing it to accumulate at the bottom of the vessel This pr otects the compr essor from possible damage caused by the intake of liquid refrigerant To Compressor lt gt Figure 3 4 Accumulator 11 REFRIGERANT SYSTEM CONDENSER OUTLET PIPE COMPRESSOR SUCTION PIPE Insulated COMPRESSOR DISCHARGE PIPE CONDENSER INLET PIPE Figure 3 5 Refrigerant System Piping
11. blow cool air into the interior and an exterior unit Condenser to exhaust exchanged heat to the outdoors Unlike conventional air conditioners the MovinCool Spot Cooling System is a spot cooler which directs cool air to particular areas or objects MovinCool Spot Cooling Systems have the following features 1 Compact Design The innovative design of MovinC ool has resulted in one compact unit replacing the need for two separate units 2 Easy Transportation and Installation With the whole cooling system built into one compact unit MovinCool requires no piping and can be easily transported and installed 3 Energy Conservation MovinCool is economical because it cools only the area or objects which need to be cooled GENERAL DESCRIPTION CONSTRUCTION SPECIFICATIONS and DATA E CENTRIFUGAL FAN CONDENSER 42 CAPILLARY TUBES COMPRESSOR T 2 N DRAIN TANK CONTROL BOX DRAIN SWITCH 7 Figure 2 1 Construction of Office Pro 24 CONSTRUCTION SPECIFICATIONS and DATA EVAPORATOR CONTROL PANEL EL TOP E EXHAUST AIR VENT e RIGHT HANDLE SIDE PANEL FRONT PANEL 9 FAN MOTOR H
12. es approximately 4 0 gallons 15 liters in the drain tank the drain tank base plate which is suppor ted atits fulcrum is pushed down in thear row direction as shown inthe figur e below When the drain tank base plate is for ced down the top of the drain tank base platetur ns offthe contacts 1 2 ofthe micr switch This causes the gr ound signal atthe 103 connector ofthe contr ol panel assembly to go open When the microprocessor detects this event itshuts the unitof fand flashes the T ank Full LED When the drain tank is emoved orthe drain tank is emptied the top of the drain tank base plate etur ns to its original position fr om the tension of the coil spring Then contacts 1 2 of the drain tank switch close This provides a gr ound to the micr oprocessorthr ough J 103 connector D D EVAPORATOR D D 1210 DRAIN PAN DRAIN TUBE 7x7 gt CERTI DRAIN TANK NS UE dE NZ BRAIN WATER 7 lt gt 1 E x Ap up KL TE FULCRUM Figure 4 6 Operation of Drain Switch 7 How to e start the unit Ifthe program Run LEDis flashing pr ess the Cool On Of f button to continuer unning the pr ogram If the program Run LED is illuminated continuously pr ogram activated no fur thersteps ar enecessar y If no program exists orthe pr ogram was deactivated pr ess one of the fan mode buttons orthe Cool On Off button The unit willr eturn
13. he cylinder and eccentrically mounted oller The blade is in contact withther ollerby means of spring for ce Itpartitions the space between the suction side and the dischar ge sideto keep compr essed r efrigerantfr om retur ning to the suction side There is no suction valve Thedischar ge valve is designed notto open until the pressure ofther efrigerant within the cylinder reaches orexceeds thatofther efrigeranton the dischar geside This design pr events the backwar d flow of dischar ge gas 3 Condenser The condenseris a heat exchanger with copper tubes thatar e cover ed with thin aluminum projections called spine fins Heatis givenof f and absorbed by air being pulled 055 condenser fins by the centrifugal fan and then expelled thr ough the exhaust air duct 10 DISCHARGE HOLE DISCHARGE lt SPRING VALVE Ja SUCTION EN BLADE Figure 3 2 Compressor Operation REFRIGERANT SYSTEM 4 Capillay Tubes High Temp High Press The capillar ytubes ar e a long thin tubes utilizing Liquid Refrigerant line flow esistance to ser ve as an expansion gt valve The length and the inner diameter ofthe capillar ytubes ar e determined bythe capacity of the refrigeration system specified operating conditions and the amountofr efrigerant The capillar y tubes causethe high pr essure high temperatur e liquid r efrigerantsentfr omthe condenserto expand rapidlyasther efriger
14. it All electrical components replaced must be genuine MovinCool purchased from an authorized reseller When handling refrigerant always wear proper eye protection and do not allow the refrigerant to come in contact with your skin e Do not expose refrigerant to an open flame The proper electrical outlet for MovinCool units must be equipped with a UL ap proved ground fault breaker to prevent electrical shock from the unit When brazing any tubing always wear eye protection and work only in a well venti lated area TABLE OF CONTENTS a i DEFINITION OF TERM Susini i GENERAL PRECAUTIONS u a i TABLE OF CONTENTS ci ii GENERAL DESCRIPTION u nee aa 1 CONSTRUCTION SPECIFICATIONS DATA enne nnn nnn 3 REFRIGERANT SISTEMA 9 ELECTRICAL SYSTEM a 13 TROUBLESHOOTING amp REPAIR iii 19 1 EVAPORATOR CONDENSER INDOOR UNIT OUTDOOR UNIT Conventional Air Conditioner SS MONE I in TT HT INN MT VUL III NUH VF ull Office Pro 24 G EN ERAL DESCRIPTIO N Generally speaking conventional air conditioners cool the entire enclosed environment They act as heat exchangers requiring an interior unit evapora tor to
15. to the pr evious Temperatur e Set Point 8 Condensate Pump Kit optional The Office Pro 24 model comes standar d with a drain tank which collects the waterthatfor ms evaporator during nor mal cooling operation MovinCoolunitisr equired to operate continuously without periodic emptying ofthis tank a condensate pump may be needed A condensate pump kit CPK 5 is available forthe Of fice Pro 24 model 9 Automatic Restart after Power Interruption The program within the micr oprocessorofthe Of ficePro 24 contains a featur ethatwillautomaticallyr e startthe unit after powerislostandthenr egained Theunitalso has memor yinordertoreturnitself back to the operating mode either ManualorPr esetProgram itwas in priorto the loss ofpower Any Preset Program will also ber etained in the memor y in the event power loss occurs 17
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