Movincool Office Pro 24 User manual

SERVICE MANUAL
OFFICE PRO 24
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

i
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
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 not taken.
NOTE: Provides additional information that facilitates installation or unit operation.
GENERAL PRECAUTIONS
WARNINGS:
•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, 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.
• 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.

ii

iii
TABLE OF CONTENTS
FOREWORD............................................................................................................................... i
DEFINITION OF TERMS............................................................................................................ i
GENERAL PRECAUTIONS........................................................................................................ i
TABLE OF CONTENTS .............................................................................................................iii
GENERAL DESCRIPTION ........................................................................................................ 1
CONSTRUCTION, SPECIFICATIONS, & DATA ....................................................................... 3
REFRIGERANT SYSTEM.......................................................................................................... 9
ELECTRICAL SYSTEM........................................................................................................... 13
TROUBLESHOOTING & REPAIR ........................................................................................... 19

iv

GENERAL DESCRIPTION
1
CONDENSER
(OUTDOOR UNIT)
EVAPORATOR
(INDOOR UNIT)
Conventional Air Conditioner
Office Pro 24
Generally speaking, conventional air conditioners
cool the entire enclosed environment. They act as
“heat exchangers”, requiring an interior unit (evapora-
tor) to 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 MovinCool 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
2

CONSTRUCTION, SPECIFICATIONS, and DATA
3
EXHAUST AIR DUCT
COOL AIR VENT
EVAPORATOR
CAPILLARY TUBES
DRAIN TANK
DRAIN SWITCH
CONTROL BOX
COMPRESSOR
CONDENSER
CENTRIFUGAL FAN
Figure 2-1: Construction of Office Pro 24

CONSTRUCTION, SPECIFICATIONS, and DATA
4
ACCUMULATOR
CONDENSER FAN
FAN MOTOR
SIDE PANEL
RIGHT HANDLE
EXHAUST AIR VENT
CONDENSER
POWER CORD
CAPILLARY TUBE
COMPRESSOR
DRAIN TANK
EVAPORATOR
FRONT PANEL
COOL AIR VENT
CASTER
CONTROL PANEL
EVAPORATOR FAN
TOP PANEL
Figure 2-2: Construction Diagram

CONSTRUCTION, SPECIFICATIONS, and DATA
5
1. Basic Construction
TheMovinCoolSpot CoolingSystemiscompact
inconstructionbecausethecondenserandthe
evaporatorar eenclosedinoneunit. Theinterior
isdividedinto thr eesections. Theupper fr ont
faceisequipped withtheevaporator ,while the
lowerfr ontface containsthedraintank. Ther ear
sectioncontainsthecondenser ,thecompr essor
andthecontr ol box.
2. Air Flow
Airdrawnfr omthe rightsidefacepasses thr ough
thecondenserwhich extractstheheat. Thishot
airisblown outthr oughtheupperexhaustair
duct. Airtaken infr omthe fr ontfaceis cooledby
theevaporatorandthenblownthr oughthecool
airvent. Alltheairinletsar eequippedwithfilters,
whiletheexhaust airductispr otectedbywir e
mesh.
3. Compressor and Fans
Thecompr essorisher metically sealed. Atwo-
speedfanmotorisusedwithtwocentrifugalfans
todrawairacr oss theevaporatorandcondenser .
4. Drain Tank
Thecapacity ofthedraintankis 5.0gallons (19
liters). Theunitisequippedwith a“T ankFull”
LEDanda devicetoautomatically stopthe
operationoftheunitwhenthedraintank r eaches
alevelofappr oximately4.0gallons(15liters).
COOL
AIR OUT
EVAPORATOR
AIR IN
EXHAUST
AIR OUT
CONDENSER
AIR IN
Figure 2-3: Air Flow

CONSTRUCTION, SPECIFICATIONS, and DATA
6
Specifications Specifications are subject to change without notice.
Rating Conditions
dry bulb......................................................................95º F (35º C)
wet bulb .....................................................................83º F (28.2º C)
humidity .....................................................................(60%)
Specifications
power frequency........................................................60Hz
line voltage ................................................................single phase 208/230V
power consumption ...................................................2.7 Kw
current consumption..................................................13.1/11.8 Amps
power factor...............................................................99%
starting current ..........................................................32.9A
power wiring ..............................................................12 (3-core) AWG
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 ft3/min (1068 m3/h)
Condenser (High speed)........................ 867 ft3/min (1465 m3/h)
motor output (High) ...........................................0.48 Kw
(Low)............................................0.41 Kw
Compressor
type............................................................................rotary
output ........................................................................1.4 Kw
refrigerant type ..........................................................R-22
refrigerant capacity....................................................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 & Weight
W x D x H (in) ............................................................21.2" x 27.4" 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) .........................................95º F (35º C), ≤60%
65º F (18.3º C), ≥50%
Control Devices
temperature control ...................................................included
programmable timer ..................................................included
two speed fan ............................................................included

CONSTRUCTION, SPECIFICATIONS, and DATA
7
ø11.575
20.67
27.40 2.20
4.60
12.40
43.90
3.80
18.5011.30 7.50 21.20
2.40
16.50
19.30
Figure 2-4: Exterior Dimensions (units: inches)

DATA
8
@ 115V
40 50 60 70
Relative Humidity of Inlet Air (%)
6 (10.8)
8 (14.4)
10 (18.0)
12 (21.6)
14 (25.2)
Temperature ˚C (˚F)
Cool Air Tem
p
erature Difference Curve
10
(50) 15 (59) 20 (68) 25 (77)
15 (59)
20 (68)
25 (77)
30 (86)
35 (95)
Wet Bulb Temperature ˚C (˚F)
Dry Bulb Temperature ˚C (˚F)
2.0 (7.9)
2.4 (9.5)
2.8 (11.1)
3.2 (12.7)
3.6 (14.3)
Cooling Capability
(x10
3
kcal/h (BTU/h))
@ 115V
Coolin
g
Ca
p
abilit
y
Curve
15
(59) 20 (68) 25 (77) 30 (86)
15 (59)
20 (68)
25 (77)
30 (86)
35 (95)
Wet Bulb Temperature ˚C (˚F)
Dry Bulb Temperature ˚C (˚F) Power Consumption (kW)
0.8
1.0
1.2
1.4
1.6 @ 115V
Power Consumption Curve

REFRIGERANT SYSTEM
9
REFRIGERANT
FLOW
COMPRESSOR
ACCUMULATOR
EVAPORATOR
FAN
MOTOR
CONDENSER
CAPILLARY
TUBES
COMPRESSOR
ACCUMULATOR
EVAPORATOR
CONDENSER
CAPILLARY
TUBE
Figure 3-1: Refrigerant System
1. The component parts of the refrigerant system include the following:
•Compressor •Evaporator
•Condenser •Accumulator
•Capillarytube
Thesepar tsareallconnectedbycoppertubing. Allthe connectionshavebeen brazed.

REFRIGERANT SYSTEM
10
SPRING
SUCTION
HOLE
BLADE
CYLINDER
ROLLER
SHAFT
DISCHARGE
VALVE
DISCHARGE
HOLE
Figure 3-2: Compressor Operation
2. Compressor
Thecompr essorusedfortheunitisher metically
sealed. Thecompr essorandthecompr essor
motorar einonecasing.
A. CompressorConstr uction
Theconstr uctionofar otarytypecompr essor
isdividedinto twomechanisms. Thedrive
mechanism(compr essormotor)andthe
compressionmechanism(compr essor).
Whenther otor shaftofthemotor (drive
mechanism)tur ns,ther ollerofthecompr es-
sor(compr essionmechanism)r otatesto
compressther efrigerant.
B. BasicCompr essorOperation
Theroller(compr essionmechanism)isset
eccentricallywithacertaindistancegiven
fromthe axisofthe centerof thecylinder . A
springloadedblade ismountedon the
cylinder. The rollertur ns tocompr essthe
refrigerantinthespacebetween thecylinder
andeccentricallymountedr oller.
Thebladeisincontact withther oller by
meansofspring for ce. Itpar titions thespace
betweenthesuctionside andthedischar ge
sidetokeepcompr essedrefrigerantfr om
returningtothesuctionside.
Thereis nosuctionvalve. The dischar ge
valveisdesignednotto openuntilthe
pressure ofther efrigerantwithinthecylinder
reachesorexceedsthat ofther efrigeranton
thedischar geside. Thisdesign pr eventsthe
backwar dflowofdischar gegas.
3. Condenser
Thecondenserisaheatexchangerwithcopper
tubesthatar ecover edwiththinaluminum
projections calledspinefins. Heat isgivenof f
andabsorbedby airbeingpulled acr ossthe
condenserfinsby thecentrifugalfanand then
expelledthr oughtheexhaustairduct.

REFRIGERANT SYSTEM
11
High Temp. / High Press.
Liquid Refrigerant
Low Temp. / Low Press.
Gas and Liquid Mixture
From Evaporator
To Compressor
Figure 3-3: Capillary Tube
Figure 3-4: Accumulator
4. Capillary Tubes
Thecapillar ytubesar ealong thintubesutilizing
lineflowr esistancetoser ve asanexpansion
valve.Thelength andtheinner diameterofthe
capillar y tubesar edeter mined bythecapacityof
therefrigerationsystem,specifiedoperating
conditions,andtheamountof r efrigerant.
Thecapillar ytubescausethehighpr essure, high
temperatur eliquidr efrigerantsentfr omthe
condensertoexpandrapidly asther efrigerantis
sprayedoutthr ough thefixedorificein the
capillar ytubes. Asar esult,thetemperatur e and
stateofther efrigerantbecome lowandmist-like
respecitively ,causingittoevaporate easily .
5. Evaporator
Theevaporator ,like thecondenser ,isa heat
exchangerutilizingplate fins. Heatisr emoved
fromtheairbeingpulledacr osstheevaporator
bythecentrifugal fanandthe r esultingcoolairis
expelledthr oughthe coolairvent.
6. Accumulator
Theaccumulatorismounted onthesuctiongas
pipingbetweentheevaporator andthecompr es-
sor.Theaccumulatorseparatesthe liquidr efriger -
antfromthegas r efrigerantlettingonlythegas
refrigerantenterthecompr essor.Intheaccumu-
lator,suction gasisled intoa vesselhavinga
cylindricalbody ,and thegasspeed isdecr eased
insidethevessel.Thisseparates ther efrigerant
containedinthegasbythefor ceof gravity
causingitto accumulateatthe bottomofthe
vessel.Thispr otectsthecompr essorfr om
possibledamagecaused bytheintake ofliquid
refrigerant.

REFRIGERANT SYSTEM
12
EVAPORATOR
INLET PIPE
EVAPORATOR
OUTLET PIPE
ASSY
CAPILLARY TUBE
CONNECTING PIPE
(Evaporator to Compressor)
HIGH PRESSURE SWITCH PIPE
(Condenser to Capillary Tube)
COMPRESSOR
SUCTION PIPE
(Insulated)
CONDENSER
OUTLET PIPE
COMPRESSOR
DISCHARGE PIPE
CONDENSER
INLET PIPE
Figure 3-5: Refrigerant System Piping