Carrier 90MA-MF-MU User Manual
Marine/Industrial
Single Package
Cooling Unit
Models
90MA/MF/MU, Design Series Two
Beginning Serial Number C00400
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INSTALLATION
OPERATION & SERVICE
OPERATION AND SERVICE MANUAL
MARINE/INDUSTRIAL SINGLE PACKAGE
COOLING UNIT
MODELS
90MA/MF/MU, Design Series Two
Beginning Serial Number C00400
Carrier Refrigeration Operations, A member of the United Technologies Corporation family. Stock symbol UTX.
Carrier Transicold, Carrier Corporation, P.O. Box 4805, Syracuse, N.Y. 13221 U. S. A.
Carrier Corporation 2000 D Printed in U. S. A. 0700
SAFETY SUMMARY
GENERAL SAFETY NOTICES
The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this
manual. They are recommended precautions that must be understood and applied during operation and maintenance
of the equipment covered herein. The generalsafety notices are presented in the following three sections labeled: First
Aid, Operating Precautions and Maintenance Precautions. A listing of the specific warnings and cautions appearing
elsewhere in the manual follows the general safety notices.
FIRST AID
An injury, no matter how slight, should never go unattended. Always obtain first aid or medical attentionimmediately.
OPERATING PRECAUTIONS
Always wear safety glasses.
Keep hands, clothing and tools clear of the evaporator and condenser fans.
No work should be performed on the unit until all circuit breakers, start-stop switches are turned off, and power supply
is disconnected.
Always work in pairs. Never work on the equipment alone.
In case of severe vibration or unusual noise, stop the unit and investigate.
MAINTENANCE PRECAUTIONS
Beware of unannounced starting of the evaporator fan. Do not open the evaporator access panels before turning power
off, disconnecting and securing the power source.
Be sure power is turned off before working on motors, controls, solenoid valves and electrical control switches. Tag
circuit breaker and power supply to prevent accidental energizing of circuit.
Do not bypass any electrical safety devices, e.g. bridging an overload, or using any sort of jumper wires. Problems
with the system should be diagnosed, and any necessary repairs performed, by qualified service personnel.
In case of electrical fire, open circuit switch and extinguish with CO
(never use water).
2
SPECIFIC WARNING AND CAUTION STATEMENTS
To help identify the label hazards on the unit and explain the level of awareness each one carries, an explanation is
given with the appropriate consequences:
WARNING -- means to warn against hazards or unsafe conditions which could result in severe personal injury or
death.
CAUTION -- means to warn against potential hazard or unsafe practice which could result in product or property
damage.
The statements listed below are applicable to the unit and appear elsewhere in this manual. These recommended
precautions must be understood and applied during operation and maintenance of the equipment covered herein.
WARNING
Never reach into unit while fan is running. Lock open and tag unit disconnect before working on fan.
Remove fuses and take them with you after noting this on tag.
WARNING
Follow all Safety codes. Wear safety glasses and rubber gloves when using inhibited hydrochloricacid
solution.
WARNING
Lock open and tag unit disconnect before working on fan motor. Remove fuses and take them with you
after noting this on tag.
CAUTION
Compressor crankcase heater must be energized for 24 hours prior to start up to prevent compressor
bearing damage.
Safety-1
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CAUTION
Sharp edges of coil fins are exposed. To prevent injury, cover top of evaporator with cardboard or a few
layers of heavy tape.
CAUTION
To avoid coil damage, cover evaporator face with plywood or other rigid sheet material. If any coil fins
are mashed or bent, straighten with a coil fin comb of the proper tooth spacing (refer to “coil fins/inch”
in Table 1 through Table 2). Check for refrigerant leaks.
CAUTION
Before attempting to remove fan motors or motor mounts, place a piece of plywood over evaporator
coils to prevent coil damage.
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Safety-2
TABLE OF CONTENTS
PARAGRAPH NUMBER Page
GENERAL SAFETY NOTICES Safety-1.....................................................
FIRST AID Safety-1......................................................................
OPERATING PRECAUTIONS Safety-1......................................................
MAINTENANCE PRECAUTIONS Safety-1..................................................
SPECIFIC WARNING AND CAUTION STATEMENTS Safety-1.................................
1. INTRODUCTION 1..............................................................
2. MODEL CHART 1...............................................................
3. INSTALLATION 1...............................................................
3.1 Inspect Unit 1................................................................
3.2 Protect Unit from Damage 1.....................................................
3.3 Provide Unit Support 1.........................................................
3.4 Install Accessory Heating Coil (if applicable) 1......................................
3.5 Rig and Place Unit 1...........................................................
3.6 Install Accessory Plenum (If Supplied) 1...........................................
3.7 Install Ventilation--Air Ductwork (If required) 1.....................................
3.8 Install Return Air Ductwork (If required) 1.........................................
3.9 Check Return--Air Filters 5......................................................
3.10 Align Fan Shaft and Wheel 5....................................................
3.11 Check Compressor Spring Mounts (008 & 012 size only) 6............................
3.12 Make Condenser C onnections 6..................................................
3.13 Install Condensate Drain Line 7..................................................
3.14 Make Electrical Connections 7...................................................
4. OPERATION 8..................................................................
4.1 To Start Unit 8...............................................................
4.2 T o Shut Down Unit 8..........................................................
4.3 Sequence Of Operation 8.......................................................
5. SERVICE 9.....................................................................
5.1 Return--Air Grille Removal 9....................................................
5.2 Access Panel Removal 9........................................................
5.3 Evaporator Fan Adjustment 9....................................................
5.4 Return--Air Filter 10............................................................
5.5 Condensate Drain 10............................................................
5.6 Evaporator Coil 10.............................................................
5.7 Water Regulating Valve 10.......................................................
5.8 Condenser 10.................................................................
5.9 Refrigerant Charging 11.........................................................
5.10 Evaporator Fan Motor Removal 12................................................
5.11 Pressure Relief Device 12........................................................
5.12 Crankcase Heater 12............................................................
5.13 Cycle--LocTM -- Protection Device 12..............................................
5.14 Discharge and Suction Pressure Switches 12.........................................
5.15 Oil Charge 12.................................................................
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LIST OF ILLUSTRATIONS
FIGURE NUMBER Page
Figure 1 Base Unit Interior Details (Typical) 1................................................
Figure 2 Unit Dimensions 5...............................................................
Figure 3 Horizontal Wheel Centering 5......................................................
Figure 4 Concentric Wheel Alignment 5.....................................................
Figure 5 Connection Locations 6...........................................................
Figure 6 Typical Condenser Water Piping 6...................................................
Figure 7 Condensate Drain Trap 7..........................................................
Figure 8 Fan Pulley Adjustment 9..........................................................
Figure 9 Gravity Flow Method 10...........................................................
Figure 10 Forced Circulation Method 11......................................................
Figure 11 Charging Charts 11...............................................................
Figure 12 Mounting Base 13...............................................................
Figure 13 Wiring Schematic -- 90MA/MF/MU004/006 14........................................
Figure 14 C omponent Arrangement -- 90MA/MF/MU004/006 15..................................
Figure 15 Wiring Schematic -- 90MA/MF/MU008/012 16........................................
Figure 16 C omponent Arrangement -- 90MA/MF/MU008/012 17..................................
LIST OF TABLES
TABLE NUMBER Page
Table 1 90MA/MF/MU Physical Data -- Refrigerant 22 2.........................................
Table 2 90MA/MF/MU Physical Data -- Refrigerant 407C 3.......................................
Table 3 90MA/MF Physical Data -- Refrigerant 134a 4...........................................
Table 4 R ecommended Line Sizes, Remote Condenser 7.........................................
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ii
1. INTRODUCTION
The 90M series single--package cooling units (See
Figure 1) are designed to provide air conditioning
aboard marine vessels and in industrial applications.
The 90MA units are fitted with sea water cooled
condensers while the 90MF units are fitted with fresh
water cooled condensers. Both units are factory
charged, wired and piped. The 90MU units are similar
except they are configured for use with a remote
mounted condenser.
An accessory discharge plenum may be installed to
provide free--blow into the conditioned space. Also, an
accessory electric, hot water or steam coil heater may be
installed to provide comfort heating.
3.1 Inspect Unit
Check unit against shipping order. Inspect carefully for
concealed shipping damage. If shipment is damaged or
incomplete,file claim w ith transportation company and
advise Carrier Transicold immediately.
3.2 Protect Unit from Damage
To maintain warranty, protect unit against adverse
weather, theft, or vandalism on j ob site.
3.3 Provide Unit Support
Refer to Figure 2 and Table 1 through Table 2 for unit
size and weight. If desired, construct a frame of I--beams
or angle iron that adequately supports unit. See
Figure 12.
3.4 Install Accessory Heating Coil (if applicable)
Electric heaters are installed at the top of the unit. Water
or steam coil must be installed through the back of the
unit as described in the Installation Instructions shipped
with the accessory coil.
3.5 Rig and Place Unit
NOTE
Install accessories before placing unit.
(90MA/MF
ONLY)
Figure 1 Base Unit Interior Details (Typical)
2. MODEL CHART
This manual covers 90M design series two units as
shown in the following model chart.
1 234 56 7891011
0MA
9
PRODUCT
CODE
MODEL
MA - 90/10 Copper Nickel
Condenser
MF - Copper Condenser
MU - Condenserless
2-R-22
3 - R-134a
4 - R-407C
NOMINAL COOLING
CAPACITY (R--22)
3 1 2 --- 6 2
VOLTAGE
5 - 208/230-3-60
6 - 460-3-60
9 - 400-3-50
DESIGN
SERIES
PACKAGING
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3. INSTALLATION
To install the unit, do the following:
a. Provide space around unit for service, filter access,
and overhead clearance as indicated in Figure 2.
b. Move and store unit in upright position.
c. Useslings with spacer under base skid to prevent pan-
el damage when using hoist.
d. Units as shipped are adequately dampened against
vibration. If additional dampening is desired, place
sponge rubber or rubber mat, between deck and base
of unit or install vibration isolators.
e. Unit should be level. Unit leveling tolerance is 1/8
inch per linear foot in any direction.
3.6 Install Accessory Plenum (If Supplied)
Use plenum as template to mark hole locations in top
panel. Drill 5/32--in. (0.4 cm) holes in top panel at
marked locations and attach plenum with screws
supplied.
3.7 Install Ventilation--Air Ductwork
(If required)
Connect ventilation ducts to flanges on outside--air
supply opening (See Figure 2) using a flexible
connection. Attach ductwork to ship structure and
insulate with fiberglass and vapor barrier to reduce
sound transmission and prevent vapor condensation.
Weatherproof external ductwork, joints, and openings
in accordance with applicable codes. Ducts passing
through an unconditioned space must be insulated and
covered with a vapor barrier.
3.8 Install Return Air Ductwork (If required)
The unit back panel is to be field cut for alternate
return--air (or outdoor--air inlet) opening as indicated in
Figure 2. To install ductwork:
a. Cut out the alternate return--air opening as required.
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Table 1 90MA/MF/MU Physical Data -- Refrigerant 22
R--22 -- English Units R--22 -- Metric Units
BASE UNIT 90MA/MF/MU UNITS
NOMINAL CAPACITY Tons (kW) 3 5 7.5 10 10.5 17.6 26.4 35.1
OPERATING WEIGHT
Base Unit -- 90MA/MF Pounds (kg) 390 427 895 950 177 194 406 431
Base Unit -- 90MU Pounds (kg) 330 360 835 890 150 163 379 404
Discharge Plenum Pounds (kg) 25 25 50 50 11.3 11.3 22.7 22.7
COMPRESSOR TYPE Welded Hermetic
Quantity of Cylinders -- -- 4 6 -- -- 4 6
Quantity of Unloading Cylinders -- -- 0 2 -- -- 0 2
Quantity of Capacity Steps -- -- 1 2 -- -- 1 2
DISCHARGE PRESSURE SWITCH
Opens -- 90MA/MF psig (kPa) 39510 272569
Closes -- 90MA/MF psig (kPa) 29520 2034138
Opens -- 90MU psig (kPa) 4267 293748
Closes -- 90MU psig (kPa) 32020 2206138
SUCTION PRESSURE SWITCH
Opens psig (kPa) 274 18628
Closes psig (kPa) 677 46248
OPERATING CHARGE -- 90MA/MF pounds (kg) 3.1 5.3 11. 2 10 1.4 2.4 5.1 4.5
CONDENSER -- 90MA/MF
Number & Type 1....Tube In Tube
Water Volume gallon (liter) 0.39 0.86 2.42 1.48 3.3 9.2
EVAPORATOR AIR FAN Adjustable, Belt Driven Centrifugal: 1750 RPM Motor @ 60 Hz
Nominal Flow cfm (m3/h) 1200 2000 3000 4000 1698 2830 4245 5660
Standard Speed Range RPM 525-750 647-915 495-700 600-850 427-652 593-762 412-583 500-708
Maximum Allowable RPM 1050
Belt Quantity / Pulley Pitch Diameter inches (cm) 1/8.0 1/6.4 1/8.5 1/7.0 1 / 20.3 1 / 16.3 1 / 21.6 1 / 17.8
Motor Pulley Pitch Diameter Range inches (cm) 2.4to3.4 6.1to8.6
Motor Nominal Rating(@60 Hz)...Frame Size
Standard horse power 1/3...56 3/4...56 1...56 2...56 .25 / 56 .56 / 56 .75 / 56 1.5 / 56
Alternate(SeeNote1) horse power 3/4...56 1...56 2...56 3...56 .56 / 56 .75 / 56 1.5 / 56 2.2 / 56
Alternate(SeeNote1) horse power -- -- -- -- 3...56 -- -- -- -- -- -- 2.2 / 56 -- -EVAPORATOR COIL 3/8 (.95 cm) OD, Copper Tubes, Aluminum Fins
Tube Type Prime
Quantity of Rows...fin Spacing fins/inch(cm) 2...14.4 3...14.4 3...12.5 2...5.7 3...5.7 3...4.9
Face Area sq ft (sq m) 5 5 7.3 8.5 0.46 0.46 0.68 0.79
RETURN AIR FILTERS Factory Supplied, Cleanable
Quantity...Size inches (cm) 2...16 x 25 x 1 4...16 x 20 x 1 2...40.6x63.5x2.5 4...40.6x50.8x2.5
CONDENSER CONNECTIONS
Water Inlet (bottom) & Outlet (top) inches FPT 1/2 3/4 1 1 1/2 3/4 1 1
Maximum Working Pressure (refrigerant side) psig (kPa) 400 2758
CONDENSATE DRAIN CONNECTIONS inches FPT 3/4 3/4
ACCESSORY HEATING COILS
HOT WATER
Quantity of Rows...fin spacing fins/inch(cm) 1...15 1...15 2...14 2...14 1...5.9 1...5.9 2...5.5 2...5.5
Face Area sq ft (m) 5 5 6 6 0.46 0.46 0.56 0.56
Water Inlet (top) & Outlet Connection (bottom) inches (cm) 7/8 ODF 1--1/4 MPT 7/8 ODF 1-- 1/4 MPT
STEAM
Quantity of Rows...fin spacing fins/inch(cm) SeeNote2 1...14 1...14 SeeNote2 1...5.5 1...5.5
Face Area sq ft (m) SeeNote2 6.9 6.9 SeeNote2 0.64 0.64
Water Inlet (top) & Outlet Connection (bottom) inches (cm) SeeNote2 1--1/4 MPT SeeNote2 1--1/4 MPT
English (Metric)
LEGEND
FPT = Female Pipe Thread MPT = Male Pipe Thread ODF = Outside Diameter Female
204 206 208 212 204 206 208 212
Scroll
Semi--Hermetic
Reciprocating
Welded Hermetic
Scroll
Semi--Hermetic
Reciprocating
NOTES:
1. Motors and drives other than those furnished with unit must be purchased separately. Contact your Carrier Transicold representative.
2. Accessory heating coil in 004 and 006 units is combination hot water/steam. See hot water data.
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