SERVICE MANUAL
Contents
1. 20 6 1 Circuit Diagram IDFM ODFM RCM Q DP x LW Sa lt 3 538 CN a O a g CN F 000900 see OOO SIE lu SIE gt 8 als Ojala CF2 1884 CFI O O D O O O 1 2 O 59 9 3 4 9 2 a 5 6 sw EMERGENCY 7 RX Bd STOP SAN d TB2 cnz 00000 00000 OSG POE Rg GROUND G Fire Alarm O lO RE CN25 4 CN22 CN21 3 Y P TB1 a OO RO O0 r ACHSV EXTERNAL one 1 1PHASE OUTPUT lolo BROWN ais 520D2 B20D1 spj S2CT Tog 4 SS 60Hz G1 IS 5 YELLOW L oo nsv Er G OI ORANGE CN13 CN12 CN11 CN03 CN16_ CN1552CM Bee O lo leRoun vos ese va Pooool OOS OO eco 1 5 CONTROL BOX 3 ODS CTS RTS FLTS TB1 Terminal Block 1 RTS Room Thermistor TB2 Terminal Block 2 CF1 Capacitor For IDFM RB Relay Board CF2 Capacitor For ODFM IDFM Indoor Fan Motor CC Capacitor For Compressor ODFM Outdoor Fan Motor OL Overload Protector MC Compressor Motor DP Drain Pump RX Auxiliary Relay SW Switch For Emergency ODS Outdoor Thermistor FLTS Float Switch2. Y gt Wer Nl gt gt gt AX E Oe Accumulator Compressor Refrigerant Flow gt Accumulator Capilla lt 1002752 Operation Section 5 2 Compressor 1 2 The compressor used for the unit is hermetically sealed The compressor and the compressor motor are in one casing Compressor construction The construction of a rotary type compressor is divided into two mechanisms the drive mechanism compressor motor and the compression mechanism compressor When the rotor shaft of the motor drive mechanism turns the roller compression mechanism rotates to compress the refrigerant Basic compressor operation The roller compression mechanism is set eccentrically with a certain distance given from the axis of the center of the cylinder A spring loaded blade is mounted on the cylinder The roller turns to compress the refrigerant in the space between the cylinder and eccentrically mounted roller The blade is in contact with the roller by means of spring force The blade partitions the space between the suction side 1002753 Discharge Hole Discharge Spring Valve Suction Hole Blade Shaft a Roller Cylinder 1000510 and the discharge side to keep compressed refrigerant from returning to the suction side There is no suction valve The discharge valve is designed not to open until the pressure of the refrigerant within the cylinder reaches or e
3. 34 C or less 6 11 Drain Pump e The drain evaporator condensation accumulated in the drain pan pump evacuates Drain pump operation is coupled with compressor operation 1000523 6 12 Float Switch A float switch is installed in the drain pan The float switch is a normally closed type switch If evaporator condensation cannot be evacuated and the drain pan becomes full the float rises turning the switch OFF which then halts relay CM 12 operation This prevents the drain pan from overflowing and alerts the user of an abnormality Operation Section 29 1000524 Repair Section 7 TROUBLESHOOTING 7 1 Troubleshooting Chart Condition Possible Cause Remedy Unit does not operate Power supply is off Check circuit breaker sound pattern 3 2 Power interruption Unit will turn on automatically when power returns some thermostats require resetting 3 Air duct blockage Check duct for any blockage or excessive kinks 4 OFF signal input Check for OFF signal input fire alarm control panel 5 Override Stop switch is active Ensure the switch is in the OPERATE position 6 Battery depleted by the Change battery thermostat Insufficient cooling Unit 1 Condenser air intake or outlet Check for any blockages in the ceiling operation interrupted fre blockage in the ceiling quen
4. CTS Freeze Protection Thermistor G Ground 1002756 6 2 Control Box RB Relay Board TB1 Terminal Block mr pole ololololela 2 6 Operation Section CC Capacitor for Compressor RX Auxiliary Relay 4 Position Dipswitch OFF Position TB2 Terminal Block2 CF1 Capacitor for Indoor Fan Motor CF2 Capacitor for Outdoor Fan Motor 21 1002757 22 Operation Section 6 3 Power Supply Requirements e The CM 12 requires a single phase 115 V 60 Hz power supply e The power supply should be a dedicated single outlet circuit with a UL approved short circuit and ground fault protective breaker and a maximum fuse size of 20 A R T G nana ER oafalfalle E S 0O O O o Circuit Breaker with gt gt 3 OY Ground Fault Protective Y Y Q E E a A A ES i Fuse 20 A Max S S 5 CM12 Terminal Block Ground AS Terminal 0 R T G 10 1 ij 1002758 6 4 Input Signal e Install the wall thermostat in a location inside the room where it can be c
5. Indoor Fan SEN Compressor Drain Pan Controller Frame Left Side Panel Service Panel Front Panel 1002760 8 2 Disassembly Screws 4 1002761 Power Supply Line INTA Ground Line INIA 1002762 Screws 3 Top Panel ae Screws 2 Screws 4 ga Screws 5 1002763 Repair Section 35 1 Take out the four 4 screws and then remove the service panel 2 Disconnect the two power supply lines from the terminal and disconnect the ground line CAUTION e Ground tightening torque 0 74 0 15 ftelbf 1 0 0 2 Nem 3 Take out the eighteen 18 screws and then remove the top panel Repair Section 36 Front Panel Screws 3 Screws 9 Screws 4 1002764 Connector 1002766 1002787 1002765 4 Take out the sixteen 16 screws and then remove the front panel 5 After disconnecting the relay connector white two pin please remove the drain pump referring to pattern 1 or 2 Pattern 1 Take off the three 3 nuts and remove the hose clip and remove the drain pump assy Pattern 2 Take out the four 4 screws and remove the drain pump Repair Section 37
6. and connect the hose to the refrigerant cylinder R 410A 2 Loosen the nut on the gauge manifold side of the charging hose green 3 Open the valve of the refrigerant cylinder and perform air purging in the charging hose green Then tighten the nut 4 Open the high pressure valve of the gauge manifold Charge the system with refrigerant until the high pressure gauge indicates 57 psi 390 kPa After charging is complete close the high pressure valve 5 Open the valve of the refrigerant cylinder and perform air purging in the charging hose green Then tighten the nut 6 Check carefully for gas leaks inside the refrigerant system using the gas leak tester 7 Repair any leak WARNING Do not attempt any repair on a charged system WARNING Before checking for gas leaks fully confirm that there is nothing flammable in the area to cause an explosion or fire Contact of refrigerant with an open fire generates toxic gas Repair Section 55 5 Evacuation repeat Valve Setting 1 Close the valve of the refrigerant cylinder Then Gauge EA KEKE remove the charging hose green from the y 30 inHg 100 kPa or larger refrigerant cylinder and connect it to the bow RS High Pressure Gauge refrigerant recovery machine Valve High Pressure Valve lt NOTE gt _ High Pressure Keep the high pressure valve and the low Side Tube deem Pump pressure valve of the gauge manifol
7. When assembling the motor ensure that the wire connection ends are facing down Wire Connection 1002776 Repair Section 39 8 4 Removal of Outdoor Fan Assembly for Condenser FRAME RING 1002777 1002778 1 Take off the four 4 nuts Outdoor Fan Assembly For The Condenser 1000544 2 Disconnect the motor connector white six pin from circuit board CN22 and remove the indoor fan assembly for the condenser Repair Section 40 Ring WS 2 4 CA Screws 3 oe ee 1002779 0 12 in 3mm or more gt W Screw T Hr Ta E 0 12 in 3mm or more Motor Axis 1002780 _ Io 9 AY O Don a Wire Connection 1002781 3 Take out the three 3 screws and then remove the ring Loosen the set screw with an Allen wrench and remove the fan Z CAUTION When assembling the ring ensure that the straight surface of the ring is facing forward 4 When assembling the fan ensure that the screws align with the motor axis positioning holes CAUTION e Tightening torque 10 80 2 17 ftelbf 14 7 3 0 Nem e Verify the clearance between the fan and case ring After installing the fan and fan motor ensure that the clearanc
8. When the shaft turns oil is scraped upward by the oil scraper along the inside diameter of the hollow shaft The oil is fed through the oil hole by centrifugal force then supplied to the lubrication groove for each shaft journal lubricating the bearing In this lubrication system oil enters into each bearing separately and returns to the oil reservoir This system effectively prevents bearing temperature increases and offers high reliability In addition the specially treated 4 Rotor Hollow Shaft Eccentric Shaft Cylinder PST bs Ko Oil Hole Oil Scrapper 1001680 shaft journal keeps the bearing from being damaged during high temperature operation 5 3 Condenser e The condenser is a heat exchanger with copper tubes that are covered with thin aluminum projections called plate fins e Heat is given off and absorbed by air being pulled across the condenser fins by the centrifugal fan and then expelled through the exhaust air duct 1002754 5 4 5 5 5 6 Capillary Tube The capillary tube is a long thin tube utilizing line flow resistance to serve as an expansion valve The length and the inner diameter of the capillary tube are determined by the capacity of the refrigeration system specified operating conditions and the amount of refrigerant The capillary tube causes the high pressure high temperature liquid refrigerant sent from the condenser to expand r
9. a Gee ee 35 8 3 Removal of Indoor Fan Assembly for Evaporator eee 37 8 4 Removal of Outdoor Fan Assembly for Condenser 39 8 5 Removal of ElectricalParts 00 0000 41 8 6 Inspection of Capacitor For Fan Motor and Compressor oon 44 8 1 Inspection of Compressor acoso mac da alae ead B end fe SRG AAE EAN aa eR ee 45 8 8 Inspection of Fan Motor 0c eee eee 46 8 9 Inspection of Thermistor een 47 8 10 Inspection of Wiring Connection eene 47 8 11 IASPEEHON zt Hven Actor A A A lh glo A Ad gt A tet 47 9 REFRIGERANT SYSTEM REPAIR 9 1 Repair of Refrigerant System 0 0 aan 48 9 2 Removal of Refrigerant System Components ane 50 9 3 Charging the System with R 410A Refrigerant 0 0000 51 9 4 Refrigerant Charging Work eee 56 10 REASSEMBLY 10 1 Removal of Unit ar oen on er eneen vene a ee ie en ie a en ae ea bee ae 58 10 2 Compressor Mounting eses pirrar aaee e eee 58 10 3 Indoor Fan Assembly ic A ae de ie A eh ee E 58 10 4 Outdoor Fan Assembly 58 10 5 Wiring NOICE et oee Zn trant shal pd BAG A Naakt NA An EDA er RL A 58 10 6 Perform the Inspection sis si ze anr want Hee aas dead Bee a VSG Aad arta wand He eek Wen ce 58 6 Operation Section 1 PRECAUTIONS FOR SAFETY 1 1 Foreword e This manual has been published to service the MovinCool CM 12 Please use this service manual only when servicing the CM 12 1 2 Definition of Terms WARNING D
10. supply voltage inspection e Check the power supply voltage Single phase 115 V 60 Hz e Check the operation and condition of the fuse or circuit breaker for the power source 2 Inspection of plate fins e Inspect the plate fins for any dirt dust lint or debris that may have caused insufficient SS cooling performance of the unit If cleaning of the fins is necessary it is recommended that this service be performed by a qualified service EC technician Q 1001780 3 Operating environment inspection Operating environments can vary depending on location climate and surrounding conditions Installation location also can cause operational problems Consult your reseller concerning operational environment requirements 4 Operating environment examination Measure the temperature difference between Condenser the evaporator inlet and the cooling air duct Condenser outlet If the difference is out of the range Exhaust shown in the graphs on page 14 proceed with the remedy suggested in the troubleshooting chart on page 30 Cool Air y Supply Evaporator Air Intake 1002841 Repair Section 8 DISASSEMBLY 8 1 Parts Construction Top Panel Condenser Outdoor Thermistor ODS Nu Wire In Room Thermistor RTS Freeze Protection gt Thermistor CTS m Evaporator Frame En 26 q SS amp
11. type recommended No voltage contact input Contact resistance less than 100 ohm Warning Signal Output 2 Aat 30 V DC AC or less resistive load Dimension WxDxH 32 0 x 19 9 x 14 8 in without flange and mounting bracket 813 x 505 x 376 mm WxDxH 34 8 x 22 7 x 15 4 in with flange and mounting bracket 884 x 577 x 391 mm Weight Net 128 Ib 58 kg Shipping 141 Ib 64 kg Condensate Pump Pump Rate 5 0 gal h 19 L h Capacity Head 4 ft 1 2 m Operating Condition Evaporator Max Inlet Air 95 F 35 C 50 RH Range Min Inlet Air 65 F 18 C 50 RH Condenser Max Inlet Air 113 F 45 C Min Inlet Air 65 F 18 C Maximum Duct Length Cold Duct 3 20 ft 6 1 m Hot Duct 3 10 ft 3 0 m Maximum Sound Level Measured at 1 m under the 52 dB A ceiling with evaporator duct and ceiling tile e Specifications are subject to change without notice lt NOTE gt 1 With two 6 foot 1 8 m ducts containing one 90 bend each supply grill and return grill with filter 0 16 IWG 40 Pa external static pressure on high fan speed 2 When ambient temperature is lower than 65 F 18 C operation may be interrupted due to anti freeze protection activation 3 Confirm pressure drop of duct grills and filter with manufactures specifications Operation Section 4 2 Characteristics Cooling Capability Curve 16 Cooling capacity x
12. with compatible outputs such as alarm speakers light indicators etc lt NOTE gt However when dipswitch no 4 on the relay board is OFF an alarm will not sound Pattern 1 Internal thermister failure Pattern 2 Pump or drain problem Pattern 3 Refrigeration system problem Pattern 4 Fire alarm signal input 1002772 32 Repair Section a ale Cause Detection Details Alarm Clear Method Temperature sensor failure When an abnormality is detected in either RTS Unplug the unit and Thermistor short failure CTS or ODS plug it back in 1 Detection value Below 136 5 k ohm 93 2 F 34 or C or above 566 k ohm 181 4 F 83 C Reset the power from the breaker Condensation overflow When the float switch is OFF continuously for 60 Unplug the unit and Water leak detection sec plug it back in 2 or Reset the power from the breaker Cooling function failure When the following occurs 3 times Unplug the unit and Refrigeration cycle abnormality When 20 min from the start of operation has plug it back in 3 elapsed RTS CTS lt 23 F 5 C continuously or for one minute Reset the power from the breaker Fire alarm When receiving fire alarm signal input Reset the power 4 source or turn the wall thermostat off and on Repair Section 33 7 3 Basic Inspection e Perform the following inspections before disassembly 1 Power
13. 10 Btu h 35 95 2 g 30 86 25 77 a ES N yA 10 15 20 25 50 59 68 77 Wet Bulb Temp C F Power Consumption Curve 1 6 Power Consumption kW Dry Bulb Temp C F 68 77 86 95 Wet Bulb Temp C F Delta T C F Cool Air Temperature Difference Curve 15 27 0 Outdoor Temp at 95F 14 25 2 13 23 4 12 21 6 11 19 8 10 18 0 9 16 2 8 14 4 7 12 6 30 40 50 60 70 80 Relative Humidity Current Consumption Curve a y o gt o Current Consumption A 25 30 35 68 77 86 95 Wet Bulb Temp C F 1002785 Operation Section 15 5 REFRIGERANT SYSTEM 5 1 Refrigerant System Construction The component parts of the refrigerant system include the following Compressor Evaporator Condenser Accumulator Capillary tube These parts are all connected by copper tubing All the connections have been brazed Connecting Pipe Compressor Discharge Pipe Evaporator Inlet Pipe Capillary Tube Evaporator Outlet Pipe Assy Condenser Evaporator Connecting ae y il Condenser Outlet Pipe S H s IN N Compressor xe Y Suction Pipe Condenser el Insulated Inlet Pipe EX a D BIT a 9
14. 8 3 Removal of Indoor Fan Assembly for Evaporator Frame 1002767 Indoor Fan Assembly For The Evaporator 1000537 Ring 1002773 1 Disconnect the three connectors two white two pin connectors one white three pin connector and then take out the two 2 screws and the two 2 nuts 2 Disconnect the motor connector white six pin from circuit board CN23 and remove the indoor fan assembly for the evaporator Repair Section 38 CZ 3 Take out the three 3 screws and then remove ac y the ring Loosen the set screw with an Allen an Y wrench and remove the fan Set S peak IN CAUTION Straight Surface Ll A L gt When assembling the ring ensure that the ae Screws 3 straight surface of the ring is facing forward Ring a 1002774 4 When assembling the fan ensure that the screws 0 12 in 3 mm IE 10 12 in 3 mm a de or more or more align with the motor axis positioning holes Set Screw A CAUTION C ID e Tightening torque An A 3 7 1 1 ftelbf 5 0 1 5 Nem Motor Axis e Verify the clearance between the fan and case 1002775 ring After installing the fan and fan motor ensure that the clearance between the fan and case ring is at least 0 12 in 3 mm 5 Take out the four 4 screws and then remove the fan motor CAUTION
15. SERVICE MANUAL CM 12 SERIAL NUMBER FROM JANUARY 2009 0109 TO PRESENT MOVINCOOL THE 1 SPOT COOLING SOLUTION DoclD 00G00027EB 2010 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 registered trademark of DENSO Corporation Table of Contents Table of Contents Operation Section 1 PRECAUTIONS FOR SAFETY 1 1 Foreword 4225452 5 so ds dr EE EL B eed a oa 6 122 Definition Of Terms kva Heenan Ges lat to Man dd Gers ine 6 13 General Precautions fnan tn a BE Set Ee EE ae es 6 2 GENERAL DESCRIPTION 21 Spot Cool anat A td a aay Ana wat dy NE 7 2 2 Lightweight Compact Ceiling Mounted eee 7 2 3 Commercial ControllerUsage 0 00 7 24 Energy Conservation at sus vac ee Pepe ha ad eds oe ase bale Be Me Ohad eA oe ad 7 2 5 Added Safety through the Use of a Fire Alarm eee 7 3 CONSTRUCTION 321 Exterior DIMENSIONS rs nnee A ELLA UE ERLE ae EA 8 3 2 ExteriorComponents 000 0 000 9 3 3 ntenal Structure 5 a A al Bie MERE ARE 10 3 47 Basic Consttucthon sn gad eve wale aed e aad nipah o a AG al a haa a ead eee 11 Bee O oh sea feces SR SR RIAA TR RI 11 4 SPECIFICATIONS 4 1 Technical Specifications neee 12 42 A es etend sat eden be dein
16. apidly as the refrigerant Operation Section High Temp High Pressure Liquid Refrigerant gt Eo Low Temp Low Pressure Gas and Liquid Mixture 1001887 is sprayed out through the fixed orifice in the capillary tube As a result the temperature and state of the refrigerant becomes low and mist like respectively causing it to evaporate easily Evaporator The evaporator is a heat exchanger covered with plate fins Heat is removed from the air being pulled across the evaporator by the centrifugal fan and the resulting cool air is expelled through the cool air vent Accumulator The accumulator is mounted on the suction gas piping between the evaporator and the compressor The accumulator separates the liquid refrigerant from the gas refrigerant allowing only the gas refrigerant to enter the compressor In the accumulator suction gas is led into a cylindrical vessel where the speed of the gas is decreased This process separates the refrigerant contained in the gas by the force 1002755 From Evaporator To Compressor i 1000514 of gravity causing the refrigerant to accumulate at the bottom of the vessel As a result the compressor is protected from possible damage caused by liquid refrigerant intake Operation Section
17. ated by 0 2 oz 5 g 4 Open the high pressure valve of the gauge manifold and the valve of the refrigerant cylinder Charge the system with refrigerant to the specified amount Standard Amount of Refrigerant 1 23 Ib 0 56 kg N CAUTION The amount of refrigerant charged has a great effect on the cooling capacity of the unit Charge to the specified amount always observing the scale graduations while charging 5 Close the high pressure valve of the gauge manifold and the valve of the refrigerant cylinder 2 Removal of gauge manifold Pinch Off Tool To Gauge Manifold Side To Refrigerant Cycle Side 1002185 Repair Section 57 1 Crimp the pinch off tube with a pinch off tool 2 Remove the gauge manifold and the process tube fitting Crush the end of the pinch off tube 3 Braze the end of the pinch off tube 4 Ensure that a gas leak is not present at the pinched off portion and the brazed end Repair Section 10 REASSEMBLY 10 1 Removal of Unit e Reassemble the unit in the reverse order of removal Described below are the parts that require special care in reassembling the unit Perform all wiring or rewiring as referenced in the wiring diagram 10 2 Compressor Mounting e Mount the compressor on the frame using cushions steel collars spring washers plate washers and nuts 10 3 Indoor Fan Assembly Nut Spring Washer Cushion St
18. brazed fitting are a 0 025 0 075 mm quite important As for the shape of the brazed i Z fitting it is necessary to maximize its adhesive Je Z T area The clearance of the brazed fitting must be minimized to facilitate brazing filler metal to Clearance From The Pipe Fitting and Tubing flow into it by capillary action 1002225 Cleaning brazing filler metal and pipe When the refrigerant system has been opened up exposure to heat may have caused brazing filler metal to stick to the inside and outside of the pipe Brazing filler metal may also be compounded with oxygen in the air to form oxide film Fats and oils may stick to the pipe from handling All these factors can reduce effectiveness of brazing It is necessary to eliminate excess brazing filler metal using sand paper and by cleaning thoroughly with a solvent such as trichlene CAUTION Do not use chlorine cleaner Repair Section 49 4 Use of dry nitrogen gas e During brazing the inside of the pipe undergoes an oxidative reaction due to the brazing flame Introduce dry nitrogen gas 0 3 gal min 1 L min adjust with the flow regulator through the pinch off tube of the refrigerant lt NOTE gt Take care not to allow dirt water oil etc to enter into the pipe 5 Vertical joints e Heat the whole brazed fitting to a proper Vertical Down Joint Brazing Filler Metal brazing temperature Bring the brazing fille
19. d closed in Operation 1002227 2 Using procedure in the Evacuation evacuate the system until the high pressure gauge indicates 30 inHg 100 kPa or larger For 15 min or more 3 After evacuation is complete close the high pressure valve of the gauge manifold A CAUTION Make sure to evacuate the system twice or more using the repetitive vacuum method Evacuate the system an additional time on rainy or humid days 56 Repair Section 9 4 Refrigerant Charging Work 1 Refrigerant charging Valve Setting LO Closed Air Purging Y Open The Valve of Refrigerant Cylinder E ard Y Charging Hose 33 Red Green 3 5 To Process Tube Fitting 1001901 Valve Setting Lo Hi Specified Amount Lo HI gt Closed Open of Refrigerant Closed Closed High Pressure Valve Valve of Refrigerant Cylinder Process Tube Fitting ee High Pressure Side Tube 1001903 1 Remove the charging hose green from the vacuum pump and connect it to the refrigerant cylinder R 410A 2 Loosen the nut on the gauge manifold side of the charging hose green Open the valve of the charging hose green Open the valve of the refrigerant cylinder After air purging tighten this nut and close the valve of the refrigerant cylinder 3 Securely place the refrigerant cylinder on a scale with a weighing capacity of 70 Ib 30 kg that is gradu
20. e between the fan and case ring is at least 0 12 in 3 mm 5 Take out the three 3 screws and then remove the fan motor Z CAUTION When assembling the motor ensure that the wire connection ends are facing down Repair Section 41 8 5 Removal of Electrical Parts Capacitor for Compressor Stand off Relay Board Condenser Capacitor for Indoor Fan Motor Capacitor for Outdoor Fan Motor Plate Terminal 1002768 42 Repair Section 1 Relay Board To Terminal Block1 Power Source Stand Off Relay Board Fuse 250 V 5 A To Terminal Block2 External Output Stand Off To Auxiliary Relay To OD Fan Motor To ID Fan Motor Stand Off CNO1 ooo oo mal CN24 CN21 a ooo oo CN22 PA CN23 DpDooDDO a A fees TEF CN17 CN25 a UUUUUUUUUUU UUUUU Sie eee Not Use Not Use O _ stand off To Terminal Block2 Fire Alarm Input To Float Switch Not Use Stand Off To Terminal Block2 Wall Thermostat To Room Thermistor To Freeze Protection T
21. eel Collar Plate Washer 1001818 Install indoor fan Allow a clearance of 0 12 in 3 0 mm or more on each side of the indoor fan See page 38 10 4 Outdoor Fan Assembly e Install outdoor fan Allow a clearance of 0 12 in 3 0 mm or more on each side of the outdoor fan See page 40 10 5 Wiring Notice e Secure the wires using clamps so that they do not come into contact with the edges of the structure etc Secure the wires using clamps in the same position they were before removal 10 6 Perform the Inspection e Perform the inspection of cooling performance and check for abnormal noise or abnormal vibration DENSO DENSO SALES CALIFORNIA INC Long Beach CA 90810 www movincool com Third Issue March 2010
22. escribes lidia thal enol be Gosse 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 1 3 General Precautions WARNING e All electrical work if necessary should only be performed by qualified electrical personnel Repair to electrical components by non certified technicians may result in personal injury and or damage to the unit All electrical components replaced must be genuine MovinCool parts 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 Do not expose refrigerant to an open flame e The proper electrical outlet for MovinCool units must be equipped with a UL approved ground fault breaker to prevent electrical shock from the unit e When brazing any tubing always wear eye protection and work only in a well ventilated area e Disconnect power before servicing unit e Be careful of any sharp edges when working on unit Operation Section 7 2 GENERAL DESCRIPTION 2 1 Spot Cooler e In general conventional air conditioners cool the entire enclosed environ
23. four 4 screws lt NOTE gt Please use the following procedure in case there is no room to remove and replace the relay board After perform above 1 to 2 Take out the eighteen 18 screws and then remove the top panel Repair Section 44 8 6 Inspection of Capacitor For Fan Motor and Compressor 1 Ohm meter method Control Box e Set the ohm meter to the 10M range Place the CC Capacitor for two probes against the two terminals of the Compressor capacitor At first the ohm meter should indicate small value then the reading should CF1 Capacitor for Indoor Fan Motor gradually increase towards infinity This CF2 Capacitor for Outdoor Fan Motor reading indicates infinity right away open or 1002782 indicates that the capacitor is charging If the the ohm meter fails to move from 0 shorted replace the capacitor 2 Capacitance tester method e Using a capacitance tester and the chart on page 28 test the capacitor for the value indicated If the value tested is not within 10 of indicated capacitance replace the capacitor Capacitor Application Voltage Rating Capacitance Indoor Fan Motor 250 V 7 UF Outdoor Fan Motor 220 V 9 uF Compressor 370 V 60 uF WARNING e Properly discharge the capacitor s before testing and after testing has been completed e Failure to do so could cause damage to test equipment or
24. he vacuum pump and close the high pressure valves of the gauge manifold 3 Checking vacuum Valve Setting Pressure Gauge Leave valves closed for 5 min or more Pointer of pressure gauge returning to zero indicates there is a leak Pipe Brazing 1002184 Repair Section 53 1 Leave the high pressure valve and the low pressure valve of the gauge manifold closed for five min or more and confirm that the gauge pointer does not return to zero 2 If the gauge pointer returns gradually to zero there is a leak somewhere in the system this could also include gauge manifold Perform a leak check according to the procedure indicated in the next step Once the leak has been found and repaired evacuate the system and confirm it will hold a vacuum 54 Repair Section 4 Checking gas leak Valve Setting LO Closed Air Purging Y Open The Valve of Refrigerant Cylinder To Process Tube Fitting Charging Hose Green Cylinder R 410A Refrigerant 1001901 Valve Setting 57 psi 390 kPa Low Pressure Valve Closed ar Cylinder R 410A Refrigerant Cylinder Valve Open Refrigerant LO Hi LO Hi Closed Open Gauge Reading Closed Closed Open High Pressure Valve Process Tube Fitting High Press Side Tube ure 1002228 1 Remove the charging hose green from the vacuum pump
25. hermistor Dip Switch See Page 25 To Outdoor Thermistor Stand Off 1003160 1 Disconnect the power at the source 2 Take out the four 4 screws and then remove the service panel See page 35 3 Disconnect all connectors from relay board 11 connectors two connections on the relay and ground wire Refer to the figure Relay Board to identify the relay connections and the connectors marked as CN To ensure easy reinstallation be sure to label each connector wire as you remove them 4 Remove relay board from plastic stand off 6 locations Use needle nose pliers to squeeze all the stand offs before removing the relay board 5 Replace the new relay on existing stand off Make sure all stand offs are aligned horizontally Change the stand off if damaged during removal process Make sure that the dip switches on the new relay board are all set to off positions Repair Section 43 6 Reconnect all 11 connectors to the new relay board and make sure connector label 52CM3 is connected to terminal 3 and connector label 52CM4 is connected to terminal 4 of the relay Also connect the ground wire and make sure they are all properly connected Refer to the figure Relay Board to identify the connectors that need to be connected 7 Reconnect the power at the source and turn on the unit to verify the function and operation of the unit Turn off the unit 8 Close the service panel and secure with
26. igh 99 6 W Low 27 3 W Rotational Speed High 1100 rpm Low 697 rem lt NOTE gt 1002786 An internal overload relay is used to protect the fan motor This relay is built into the fan motor and interrupts the flow of current when there is an over current situation or if abnormally high temperature builds up in the fan motor 28 Operation Section 6 9 Capacitor The capacitor is used to improve the rotational power of the fan motors and compressor at startup The specification for each capacitor is shown below Rated Capacitor Capacitance Voltage Indoor Fan Motor 250 V 7 pF Outdoor Fan Motor 220 V 9 uF Compressor 370 V 60 uF 6 10 Temperature Thermistor RTS is installed and detects e The thermistor upstream of the evaporator room evaporator inlet temperature as a resistance value e The freeze protection thermistor CTS is installed in the evaporator outlet piping and detects low temperature on the evaporator as a resistance value Type Characteristic Check capacitance 1001693 1001695 Specification Short Detection Open Detection Room Thermistor RTS 5 k ohm at 77 F 25 C 181 F 83 C or more 29 F 34 C or less Freeze Protection i 5 k ohm at 77 F 25 C Thermistor CTS 181 F 83 C or more 29 F
27. is a single phase motor and is contained within the same housing as the compressor Specifications Rated Voltage 115 V Rated Output 890 W 2 Compressor overload relay An external compressor overload relay is used to protect the compressor motor This relay is mounted within the connector housing that attaches to the top of the compressor The relay interrupts the flow of current when there is an overload condition and high temperature builds up in the compressor Specifications Temperature Overcurrent Contact 302 F 150 C 17 A 30 min Open at 212 F 100 C Contact 142 F 61 C Close 1002753 Bimetal a Terminal 1001691 6 8 Fan Motor 1 Indoor Fan Motor e The indoor fan motor is a single phase induction type two speed motor Specifications Rated Voltage 115 V 60 Hz Rated Output High 41 28 W Low 12 08 W Rotational Speed High 1018 rpm Low 671 rpm lt NOTE gt Operation Section 27 1000520 An internal overload relay is used to protect the fan motor This relay is built into the fan motor and interrupts the flow of current when there is an over current situation or if abnormally high temperature builds up in the fan motor 2 Outdoor Fan Motor e The outdoor fan motor is a single phase induction type two speed motor Specifications Rated Voltage 115 V 60 Hz Rated Output H
28. lies att a Sal hak Aa hk ly ote badd ee 14 5 REFRIGERANT SYSTEM 5 1 Refrigerant System Construction oee 15 5 2 Compressor acuan a ied Aen ee eee ae ei Ge ha A ee cd 16 5 3 Condenser dt bc yee Andee a Bae Andee Ob La a A A 18 94 Capillary TUDO ii A RS 19 55A Evaporator Gt attent itn EE en RR AE ca da 19 5 63 Accumulatoren o a es ae ots ltd 19 6 ELECTRICAL SYSTEM 6 Circuit Diari nde drenken deden eh Bad dada 20 6 22 Control BOX ca sne datde ee as dn ee nd 21 6 3 Power Supply Requirements noen 22 6 45 INPUESION A lisos steak cures verta enaar are ee a ae ee Pa Ne Ada a eend 22 0 07 Operation da to ee Nn Rn RA hanna Are bone Fe 23 Table of Contents 6 60 Relay Board a dee tad dean dees dede dd el ade a ae data ded 24 6 0 Compressor aars BAS bad as ERE OER EREN EE MEE et a ee BAE 26 6 8 Fan Motor 54 4 e Pe ee EA an EEE Sie RS 27 69 Capacitolie ra ad aeta ani ta rd Seared dida 28 6 10 Temperature Thermistor en 28 6 14 Drain PUMP Arsen as A A ee A AAA A ta ks 28 6 12 Floats Switch 0 2 sand a as tek acd as a o lo ll o a A 29 Table of Contents Repair Section 7 TROUBLESHOOTING 7 1 Troubleshooting Chart 2000 0 30 Fes Ala e A A A AA a Foe eh BE ae Pas 31 i i Basie Inspections arta mat tiet Geena toa ad Ben Was haat Sasa me fades Saba 33 8 DISASSEMBLY 8 1 Parts Consthcton woar a aa ood rr oie pa A tia Sal ae Saupe A 34 8 2 Disassembly sn on on
29. lways ensure that the refrigerant system has been properly evacuated before charging with the specified amount of R 410A e Equipments is only for R 410A e Liquid charge no gas charge e Make sure not to use more than 90 of the initial weight of R 410A in the cylinder WARNING When handling refrigerant R 410A the following precautions should always be observed Always wear proper eye protection while handling refrigerant Maintain the temperature of the refrigerant container below 104 F 40 C Perform repairs in a properly ventilated area Never in an enclosed environment Do not expose refrigerant to an open flame Never smoke while performing repairs especially when handling refrigerant Be careful the liquid refrigerant does not come in contact with the skin e If liquid refrigerant strikes eye or skin Do not rub the eye or the skin Splash large quantities of cool water on the eye or the skin Apply clean petroleum jelly to the skin Go immediately to a physician or to a hospital for professional treatment Step 1 Connect manifold gauge 4 1 Evacuate the system e 15 min or more Step 2 e 30 inHg 100 kPa or more of vacuum When leak is found 2 Stop evacuating the system repair the connection Leave for 5 min or components 3 Check the vacuum Step 3 Connect to refrigerant source Step 4 Test the system for leaks Charge the system wi
30. ment They act as 7 D oN heat exchangers requiring an interior unit evaporator to blow cool air into the interior Dn nd an exterior unit ndenser to exhaust se aparar and an exterior unit condenser to exhaus Outdoor Unit Indoor Unit exchanged heat to the outdoors ON L e Unlike conventional air conditioners the NEI ja a CU MovinCool CM 12 is a spot cooler which 1000501 directs cool air to particular areas or objects The MovinCool CM 12 has the following features 2 2 Lightweight Compact Ceiling Mounted e Since the compact lightweight CM 12 can be easily installed in the ceiling it allows for effective use of floor space without interfering with room design In addition effective cooling is achieved through the use of separate intake and discharge ducts within the room 2 3 Commercial Controller Usage e The CM 12 can use Millivolt compatible thermostat commercially available controllers allowing the user to select the controller best suited to the room design 2 4 Energy Conservation e The MovinCool CM 12 is economical because Condenser it cools only the area or objects which need to G ndenser Intake Exhaust be cooled 2 5 Added Safety through the Use of a Fire Alarm Cool Air y e The CM 12 can be automaticall
31. mponents Cold Air Exhaust 10 in Dia Flange Condenser Hot Air Exhaust Evaporator Room Air Intake 10 in Dia Flange Pump Drain Pipe lt Mounting Brackets Condensate Maintenance Pan Drain Lr Service panel as Lt Signal Wire Ze Override Stop Switch ee I gt Power Cord Connection Condenser Air Intake 1002750 Operation Section 3 3 Internal Structure Condenser Control Box Compressor Evaporator ait a A at Poy AN e Indoor Fan Accumulator Outdoor Fan 1002751 3 4 Basic Construction e The MovinCool CM 12 is compact in 3 5 construction due to the condenser and evaporator being enclosed in one unit The interior of the unit is divided into two sections One section contains the evaporator which cools room interior air The other section is comprised of the condenser compressor and control box Air Flow Air drawn from the rear face passes over the condenser which extracts heat from the refrigerant The hot air is blown out through the front exhaust air vent Air taken in from the right side face is cooled by the evaporator and then blown through the front cool air duct Operation Section Control Box Condenser Evaporator Outdoor y Indoor Motor y Motor 1000507 Condenser Condenser Intake Exhaust Cool Air Sup
32. onveniently accessed Most thermostats provide these basic functions Fan Mode On Auto Selects the desired fan mode System Cool Heater Selects Cool only The CM 12 receives signals from the wall thermostat to perform the following operations Connector Signal Name Function Y Compressor ON OFF Signal When both Y and G signals are ON the compressor comes ON G Indoor Fan ON OFF Signal When the G signal is ON the indoor fan comes ON When the signal is OFF the indoor fan goes OFF G1 Indoor Fan Hi Lo Signal When the G1 signal is ON the indoor fan speed switches to Lo When the signal is OFF the indoor fan speed switches to Hi Operation Section 23 6 5 Operation 1 Basic operation e When a Y signal is input the 52CM relay located on the relay board comes ON and the compressor operates e When a G signal is input both the 52ID relay and the RX auxiliary relay come ON and the indoor and outdoor fans operate However when the G signal is OFF both the 52CM and 52ID relays go OFF stopping the compressor as well as the fans 2 Indoor fan speed control e With a G signal on the fan will start at high speed When a G1 signal is input relay 521D will become active and fan speed changes from high to low 3 Outdoor fan speed control Air Volume Control e Outdoor fan condenser fan air volume is controlled by the ODS Outdoor Thermistor ambient temperat
33. pe of fuse could result in damage to the unit and or to components It could also void the warranty of the unit 2 Dip switch setting Operation Section 25 e The controller is equipped with a four position dip switch that defaults in the OFF position The dip switch can be set to configure the following functions Switch Setting Name Function DSW4 Alarm Setting When DSW 4 is ON the buzzer sound function is disabled DSW3 Compressor Time Delay Cut When DSW 3 is ON the compressor delay timer function is disabled DSw2 Cooling Test Operation When DSW 2 is ON the compressor evaporator and condenser fan motor will turn ON This function is used for test purposes and verification DSW1 Discharge Air Test Operation When DSW 1 is ON the evaporator and condenser fan motor will turn ON This function is used for test purposes and verification 4 Position Dipswitch O OFF Position 94m mmmn TESNE ola 17 gt s O C y Board Fuse 5A sal TOO o QU eae gg ela 1002759 26 Operation Section 6 7 Compressor 1 Compressor motor The compressor motor
34. ply Evaporator A bh Room Air Intake 1002841 Operation Section 4 SPECIFICATIONS 4 1 Technical Specifications ITEM SPECIFICATIONS Electronic Features Operation Wall Thermostat Control Electronic Electronic Characteristics Voltage Requirement Single Phase 115 V 60 Hz Min Max Voltage Min 105 V Max 127 V Starting Current 50A Recommended Fuse Size Cooling Capacity and Power Consumption 15A Evaporator 80 F 27 C 50 RH Condenser 95 F 35 C Total Cooling Capacity 10500 Btu h 3090 W Sensible Cooling Capacity 1 7200 Btu h 2100 W aa Power Consumption 1 23 kW Current Consumption 1 11 2 A Power Factor 99 Refrigerant Circuit Compressor Compression Type Hermetic Rotary Output 0 91 kW Evaporator Plate Fin Condenser Plate Fin Evaporator Type of Fan Centrifugal Fan Air Flow High 324 CFM 550 m h Low 228 CFM 390 m h Max External Static Pressure 0 16 IWG 40 Pa Motor Output High 0 04 kW Low 0 01 kW Condenser Type of Fan Centrifugal Fan Air Flow High 700 CFM 1190 m h Low 370 CFM 630 m h Max External Static Pressure 0 12 IWG 30 Pa Motor Output High 0 10 kW Low 0 03 kW Refrigerant Type R 410A Amount 1 23 Ib 0 56 kg Operation Section 13 ITEM SPECIFICATIONS Signal Connection Fire Alarm Input e Dry contact
35. r 2 Outdoor fan motor Measure resistance across the terminals of the fan motor Between terminals at 68 F 20 C Black White Approx 15 38 ohm Black Blue Approx 12 59 ohm Black Red Approx 13 09 ohm If the measured resistance is not equal to the standard values listed above replace the fan motor Repair Section 47 8 9 Inspection of Thermistor e Using an Ohm meter check the resistance value across the 2 pin connector At normal temperature 77 F 25 C all thermistors room freeze or outdoor should measure approximately 5 k ohm 8 10 Inspection of Wiring Connection e Refer to the wiring diagrams on page 20 and check the connection of each wire N CAUTION Secure the wires using clamps to prevent contact with the edges of the structure etc Secure the wires in the same position as prior to removal 8 11 Inspection e In most cases the probable cause for insufficient cooling is a clogged system leakage or an incorrect amount of refrigerant In such cases inspect the system according to the following procedure 1 Inspection of clogged system e Check the component parts of the refrigerant system including piping that could be clogged with refrigerant If clogged with refrigerant only the clogged part is partially frosted In such cases change the part in question 2 Inspection of refrigerant leak e Carefully check all connections and each component for leaks whenever the refrigeran
36. r metal into contact with the fitting so that the Burner brazing filler metal starts flowing by itself Stop heating the fitting as soon as the brazing filler metal has flown into the clearance Since the brazing filler metal flows easily into the portion heated to a proper temperature it is 1000564 essential to keep the whole fitting at a proper brazing temperature Vertical Up Joint Burner Brazing Filler Metal 1001725 Repair Section 50 9 2 Removal of Refrigerant System Components CAUTION e Before any refrigeration cycle component can be replaced it is necessary to recover the refrigerant using standard recovery procedures and equipment e To prevent oxidation dry nitrogen should be conducted flow rate 0 3 gal min 1 L min through the pinch off tube during any brazing operation e During any component replacement involving brazing shield nearby parts with a steel plate etc to protect them from the flame e Evaporator e Capillary tube Condenser e Compressor lt NOTE gt Hold the compressor body not the tube when carrying the compressor ES CS Gi la l Part to Replace Disconnect at e Compressor A amp B e Condenser A amp C Capillary Tube C amp D amp E e Evaporator B amp C 1002771 Repair Section 51 9 3 Charging the System with R 410A Refrigerant A
37. r interruption restart automatic recovery Specifications Time Delay 120 sec 6 Automatic restart after power interruption Automatic Recovery Function e The program within the CM 12 microprocessor contains a feature that will automatically restart the unit after power is lost and then regained The unit also has memory in order to return itself back to the operating mode either manual or preset program it was in prior to the loss of power Any preset program will also be retained in the memory in the event power loss occurs 6 6 Relay Board e The relay board receives signals and outputs from the control board that contains a microprocessor The relay board contains the compressor fan on and fan mode speed relays e It also contains a step down transformer that converts the line voltage 115 VAC to 12 V e This 12 V is then converted from AC to DC and used for relay coil activation The 12 V DC power is sent to the control panel assembly where it is further reduced to 5 V for the system logic e The relay board also contains the DIP switch lt NOTE gt The relay board must be serviced as a complete assembly It has only one serviceable component the fuse see below 1 Relay board fuse e This fuse provides protection against damage to the step down transformer The fuse must be replaced with the exact same part or a suitable equivalent Specifications 5A 250 VAC AN CAUTION Failure to use the exact ty
38. t system is installed or repaired Use an electronic gas leak tester to inspect the system See page 48 to 57 3 Insufficient refrigerant e In case the unit is judged to be deficient in cooling capacity make to perform the inspections on page 48 9 1 1 and page 48 9 1 2 to confirm the cause of trouble Following this charge the system with refrigerant Repair Section 9 REFRIGERANT SYSTEM REPAIR 9 1 Repair of Refrigerant System 1 2 3 In case there is a leak obstruction or trouble in the refrigerant system replace or repair the part in question After replacing any component all connections must be brazed Proper brazing techniques It is desirable to use a slightly reducing flame Oxyacetylene is commonly used since it is easy to judge and adjust the condition of the flame Unlike gas welding a secondary flame is used for brazing It is necessary to preheat the base metal properly depending on the shape size or thermal conductivity of the brazed fitting The most important point in flame brazing is to bring the whole brazed fitting to a proper brazing temperature Care should be taken to not cause overflow of brazing filler metal oxidization of brazing filler metal or deterioration due to the overheating of flux Brazed fittings and fitting clearance In general the strength of brazing filler metal is Clearance lower than that of the base metal So the 0 001 0 003 in shape and clearance of the
39. th R 410A Step 5 e See specifications on page 12 Step 6 Remove manifold gauge 1002226 Repair Section 1 Connection of gauge manifold Charging Hose Side Refrigerant Cycle Side Pinch Off Tube 1002183 Low Pressure Valve Closed High Pressure Valve Closed Red Hose Process Tube Fitting High Pressure Side Tube when stopped 1000568 2 Evacuation Valve Setting LO HI Pl LO HI Gauge Closed Open Closed Closed 30 inHg 100 kPa or larger Low Pressure Valve High Pressure Gauge High Pressure Valve High Pressure Side Tube Vacuum Pump in Operation 1002227 1 Properly remove the crushed end of the pinch off tube at the high pressure side of the refrigerant cycle with a pipe cutter 2 Fit the process tube fitting to the pinch off tube 3 Connect the charging hoses red high pressure side for the gauge manifold to the process tube fitting lt NOTE gt Connect the hoses using care not to mistake the high pressure side for the low pressure side and vice versa 4 Connect the charging hose green at the center of the gauge manifold to the vacuum pump 1 Open the high pressure valve HI of the gauge manifold 2 Turn on the vacuum pump to start evacuation Evacuate the system for approximately 15 min 3 When the high pressure gauge indicates 30 inHg 100 kPa or larger turn off t
40. the unit and or result in personal injury electrical shock or death 8 7 Inspection of Compressor 1 Compressor motor e Measure resistance across the terminals of the compressor motor e Between terminals at 77 F 25 C R C Approx 0 49 0 8 ohm C S Approx 1 9 3 3 ohm If the measured resistance is not equal to the standard values listed above replace the Repair Section 45 1002770 compressor The compressor has an external overload relay The overload relay should be operational if the above resistance is obtained under normal temperature For overload relay specifications see chart on page 26 2 Overlord relay e Check for continuity across two terminals of the overload relay At normal temperature there should be continuity across the terminals OFF open contacts Operating Temperature ON closed contacts 302 F 150 C 142 F 61 C e If there is no continuity across the terminals replace the overload relay 1001701 Repair Section 8 8 Inspection of Fan Motor 1 Indoor fan motor Measure resistance across the terminals of the fan motor Terminals at 68 F 20 C Black White Approx 35 5 ohm Black Blue Approx 23 35 ohm Black Red Approx 28 23 ohm Gray If the measured resistance is not equal to the 250VAG Goza Red standard values listed above replace the fan moto
41. tly 2 Dirty condenser core surface Clean condenser core surface 3 Dirty blocked filters Clean replace air filter 4 Excessive evaporator air Evaporator ducting should not exceed 30 and bend ducting radius should be larger than twice the duct diameter 5 Condenser air intake or outlet Remove the blockage blockage in the ceiling 6 Outside operating range Use within operating temperature range Beeping Alarm coming 1 Internal thermistor failure Replace internal thermistor from unit and unit Sound pattern 1 stopped Buzzer sound 2 Pump or drain problem Check drain connection pattern indicated on sound pattern 2 Check for blockage kink or bend in drain hose Bad 3 Refrigeration system problem Check for leakage Check compressor relay Check for refrigerant blockage Repair Section 31 7 2 Alarm An alarm is emitted when a system abnormality is detected stopping the system The type of abnormality can be recognized by the alarm pattern e The CM 12 controller is equipped with a warning signal output type relay Form C normally open dry contact which can be used for monitoring the CM 12 abnormality conditions The relay contactor is closed when the following conditions have occurred Temperature sensor failure Condensation overflow Cooling function failure The relay output is rated for 5 A at 30 VDC or 5 A at 250 VAC resistive load The relay can be used to connect to warning devices
42. ure Low e When room temperature is approx 77 F 25 Outdoor Fan C or greater High Outdoor Fan Speed switches to high Ambient Temperature 73 F 77 F e When room temperature is approx 73 F 23 23 C 25 C C or less Ese Outdoor Fan Speed switches to low lt NOTE gt However when the 521D relay is ON and the ODS temperature is 73 F 23 C or less the outdoor fan will switch to low speed after running in high speed for five sec 4 Anti frost control e Anti frost controls turns the 52CM relay on in accordance with the Freeze Protection Thermistor CTS temperature in order to turn the compressor on and off to prevent a decrease in cooling performance resulting from a buildup of frost on the evaporator e Compressor off conditions Freeze protection thermistor CTS temperature lt 30 F 1 C e Compressor on recovery conditions CTS temperature gt 50 F 10 C and continuous anti frost control for 15 min 24 Operation Section 5 Compressor protection Compressor time delay control e Compressor protection consists of a time delay program within the microprocessor which prevents a heavy load from being applied to the compressor motor when restarting the unit cool mode after a very short period of time This delay is in effect any time when the compressor is turned on by either the COOL ON OFF button after the Y signal goes OFF once and then comes back ON or powe
43. xceeds discharge side pressure As a result the discharge valve prevents the backward flow of refrigerant gas 3 Operation Discharge Valve Roller 1001676 Discharge Blade 1001677 Discharge Roller 1001678 Discharge Valve 1001679 Operation Section 1 Start of compression 1 The cylinder is filled with low pressure gas 2 Since pressure in the discharge chamber is higher than in the cylinder the discharge valve is kept closed 2 Suction and compression 1 The pressure in the cylinder increases gradually 2 Refrigerant suction begins on the suction side of the cylinder 3 The discharge valve remains closed 3 Discharge 1 The pressure in the cylinder exceeds that in the discharge chamber and the discharge valve opens 2 On the suction side refrigerant suction continues 4 Completion of compression 1 When compression is completed all of the refrigerant has been drawn from the suction chamber 2 Operation then returns to step 1 Start of compression and the above process of suction continues and compression repeatedly in succession Operation Section 4 Compressor lubrication e The lubrication system is comprised of a hollow shaft an oil scraper mounted at the end face hollow shaft a shaft journal shaft bearing and the lubrication groove for the shaft journal The lubrication groove is wider than the oil hole
44. y shutdown via Supply Evaporator Air Intake 1002841 signals from a general fire alarm control panel and can also send out signal to monitoring devices such as environmental monitoring systems or annunciator systems Operation Section 3 CONSTRUCTION 3 1 Exterior Dimensions Emergency Stop Switch Ground Screw With Washer M6 Wire For External Equipment Wire For Thermostat Condenser Air Outlet Fixing Hole M4 For Optional Outlet Ring Drainage Pipe Using Internal Drain Pump Connector For Power Cord 8 01 e fo j E aw le el IOOINIAOW C 3 LD Service Panel Mount Bracket t 0 08 2 0 Thermistor ET la o gt a ES 1 3 Ep AA 3 alls gt y EE ori SSS L y o a A o 2 Sja elo O e Y l Pe Ps Ty 0 6 9 2 ls DIA 10 0 Condenser Air Inlet a 15 7 4 x DIA 0 6 2 8 19 9 Gravity Drainage Pipe With Cap Clip and Packing Evaporator Air Outlet 90 via UNIT inch Ring For Duct Evaporator Outlet Air Ring For Duct Evaporator Inlet Air Evaporator Air Inlet 1002784 Operation Section 3 2 Exterior Co
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