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SERVICE MANUAL
CLASSIC PLUS 26
DENSO SALES CALIFORNIA, INC.
REGISTERED TO ISO 9002
FILE NO. A55537
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© 1999 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 Sales California, Inc.
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SERVICE MANUAL CLASSIC PLUS 26
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FOREWORD This manual has been published to service the MovinCool Classic Plus 26. Please use this service manual only when servicing the Classic Plus 26. DEFINITION OF TERMS WARNING: Describes precautions that should be observed in order to prevent injury to the user during installation or unit operation. 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 n
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ii
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Table of Contents FOREWORD ............................................................................................................................... i DEFINITION OF TERMS ............................................................................................................ i GENERAL PRECAUTIONS ........................................................................................................ i GENERAL DESCRIPTION .................................................................
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iv
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GENERAL DESCRIPTION Generally speaking, conventional air conditioners cool the entire enclosed environment. They act as “heat exchangers”, requiring an interior unit (evaporator) to blow cool air into the interior and an exterior unit (condenser) to exhaust exchanged heat to the out- doors. 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: EV
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GENERAL DESCRIPTION 2
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CONSTRUCTION, SPECIFICATIONS & DATA Construction of Classic Plus 26 3
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CONSTRUCTION, SPECIFICATIONS & DATA Side Panel High Pressure Switch Blower Housing (Evaporator) Exhaust Air Outlet Evaporator Fan Condenser Side Panel Upper Panel Cool Air Duct Modulating Tank Blower Housing Control Panel (Condenser) Fan Motor Front Panel Condenser Fan Evaporator Air Filter (Condenser) Air Filter (Evaporator) Capillary Tube Drain Pan Control Box Drain Tube Service Panel Base Panel Base Panel Base Panel Drain Switch Rear Panel Power Cord Drain Tank Caster Compressor Construction
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CONSTRUCTION, SPECIFICATIONS & DATA 1. Basic Construction The MovinCool Spot Cooling System is compact in construction because the con- denser and the evaporator are enclosed in one unit. The interior is divided into three sections. The upper front face is equipped with the evaporator, while the lower front face contains the drain tank. The rear section contains the condenser, the compressor and the control box. 2. Air Flow Air drawn from the right side face passes through the condenser which
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CONSTRUCTION, SPECIFICATIONS & DATA Rating Conditions o o dry bulb 95 F (35 C) o o wet bulb 83 F (28.3 C) humidity (60%) Specifications power frequency 60Hz line voltage, single phase 208/230V power consumption 3.37/3.24 Kw current consumption 16.8/14.6 Amps power factor 97% starting current 62A power cord 12 (3-core) AWG Cooling Unit cooling capability 6,500 Kcal/hr 26,000 Btu/hr cooling system direct expansion Blower type of fan centrifugal fan air volume: Evaporator (high speed) 708 cfm Conde
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3.70 10.80 48.0 3.88 44.12 CONSTRUCTION, SPECIFICATIONS & DATA 10.60 2.62 3.84 7.28 29.24 23.76 12.56 2.80 21.88 3.72 16.80 28.40 19.60 Exterior Dimensions 7
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CONSTRUCTION, SPECIFICATIONS & DATA Cool Air Temperature Difference Curve (high speed only) Cooling Capability Curve (high speed only) Power Consumption Curve (high speed only) 8
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REFRIGERANT SYSTEM The component parts of the refrigerant system include the following: • Compressor • Evaporator • Condenser • High pressure switch • Capillary tube • Modulating tank These parts are all connected by copper piping. All the connections have been brazed. Modulating Tank Evaporator Condenser Capillary Tube Compressor High Pressure Switch Refrigerant System 9
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REFRIGERANT SYSTEM 1. Compressor The compressor used for the unit is hermetically sealed. The compressor and the compressor motor are in one casing. A. Compressor Theory of Operation The scroll utilizes an involute spiral which, when matched with a mating scroll form, generates a series of crescent-shaped gas pockets between the two members. During compression, one scroll remains stationary (fixed scroll) while the other form (orbiting scroll) is allowed to orbit (but not rotate) around the fi
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REFRIGERANT SYSTEM 4) By the time the gas arrives at the center port, discharge pressure has been reached. 5) Actually, during operation, all six gas passages are in various stages of com- pression at all times, resulting in nearly continuous suction and discharge. NOTE: Upon compressor shut-off, the compressor may run backward for a moment or two until internal pressures equalize. This has no effect on compres- sor durability but may cause an unexpected sound after the compressor is turned off
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REFRIGERANT SYSTEM 3. Capillary Tube The capillary tube is a long thin tube and its line flow resistance serves as an expansion valve. The length and the inner diameter of the capillary tube are determined according to the capacity of refrigeration system, operating conditions and the amount of refrigerant. The capillary tube causes the high pressure, high temperature liquid refriger- ant sent from the condenser to expand rapidly as the refrigerant is sprayed out through the fixed orifice in the
