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Carrier 50SD030 Installation Instructions Manual

Legacy single packaged air conditioner system with r-22 refrigerant single- and three-phase units sizes 024-060 50sd series
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See also: Install and Operation Instructions
50SD
Legacyt Single- -Packaged Air Conditioner System
With R- -22 Refrigerant
Single- - and Three- -Phase Units Sizes 024- -060
NOTE: Read the entire instruction manual before starting the
installation.
NOTE: Installer: Make sure the Owner's Manual and Service
Instructions are left with the unit after installation.

TABLE OF CONTENTS

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Installation Instructions
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Installation and servicing of this equipment can be hazardous due to
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mechanical and electrical components. Only trained and qualified
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personnel should install, repair, or service this equipment.
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Untrained personnel can perform basic maintenance functions such
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as cleaning and replacing air filters. All other operations must be
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performed by trained service personnel. When working on this
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equipment, observe precautions in the literature, on tags, and on
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labels attached to or shipped with the unit and other safety
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precautions that may apply.
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Follow all safety codes. Installation must be in compliance with
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local and national building codes. Wear safety glasses, protective
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clothing, and work gloves. Have fire extinguisher available. Read
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these instructions thoroughly and follow all warnings or cautions
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included in literature and attached to the unit.
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Recognize safety information. This is the safety- -alert symbol
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When you see this symbol on the unit and in instructions or manuals,
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be alert to the potential for personal injury. Understand these signal
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words: DANGER, WARNING, and CAUTION. These words are
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used with the safety- -alert symbol. DANGER identifies the most se-
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rious hazards which will result in severe personal injury or death.
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WARNING signifies hazards which could result in personal injury
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or death. CAUTION is used to identify unsafe practices which may
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result in minor personal injury or product and property damage.
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NOTE is used to highlight suggestions which will result in en-
hanced installation, reliability, or operation.
1
Fig. 1 - - Unit 50SD

SAFETY CONSIDERATIONS

C99001
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Summary of Contents for Carrier 50SD030

  • Page 1: Table Of Contents

    50SD Legacyt Single- -Packaged Air Conditioner System With R- -22 Refrigerant Single- - and Three- -Phase Units Sizes 024- -060 Installation Instructions NOTE: Read the entire instruction manual before starting the installation. NOTE: Installer: Make sure the Owner’s Manual and Service Instructions are left with the unit after installation.

  • Page 2: Introduction

    Check all items reasons due to the installation location (roofs, elevated structures, against shipping list. Immediately notify the nearest Carrier Air etc.). Conditioning office if any item is missing. To prevent loss or Only trained, qualified crane operators and ground support staff damage, leave all parts in original packages until installation.
  • Page 3 UNIT IN. [MM] CHARACTERISTICS “A” 50SD024 208/230- -1- -60 39.02 [991] 20.0 [508] 19.3 [490] 17.6 [447] 50SD030 208/230- -1- -60, 208/230- -3- -60 41.02 [1042] 20.0 [508] 14.0 [356] 13.0 [330] Fig. 2 - - 50SD024- -030 Unit Dimensions...
  • Page 4 REQUIRED CLEARANCE TO COMBUSTIBLE MATL. REQUIRED CLEARANCE FOR OPERATION AND SERVICING INCHES [mm] (R efer to M aximum O perating C learances ) EVAP. COIL ACCESS SIDE............36.00 [914.0] INCHES [mm] POWER ENTRY SIDE..............42.00 [1066.8] TOP OF UNIT...................14.00 [355.6] (EXCEPT FOR NEC REQUIREMENTS) DUCT SIDE OF UNIT.................2.00 [50.8] UNIT TOP ..................48.00 [1219.2] SIDE OPPOSITE DUCTS ..............14.00 [355.6]...
  • Page 5 HVAC unit HVAC unit base base Gask eting inner flange* Scre w Scre w Gask eting (NO TE A) (NO TE A) inner flange* *Gask eting *Gask eting outer flange outer flange Wood nailer* Wood nailer* Flashing field Flashing field supplied supplied Roof curb*...

  • Page 6: Installation

    DETAIL A C00071 A05161 CORNER WEIGHTS (SMALL CABINET) CORNER WEIGHTS (LARGE CABINET) Unit Unit Total Weight Total Weight Corner Weight 1 Corner Weight 1 Corner Weight 2 Corner Weight 2 Corner Weight 3 Corner Weight 3 Corner Weight 4 Corner Weight 4 Rigging Weight Rigging Weight Fig.

  • Page 7: Connect Condensate Drain

    3. Attach each of the 4 metal rigging brackets under the panel drain tube for leaks. Prime trap at the beginning of the cooling rain lip (See Fig. 5). Use the screws removed in step 2 above season start- -up. to secure the brackets to the unit.

  • Page 8: Install Electrical Connections

    2. Remove return duct cover located on duct panel by breaking four (4) connecting tabs with screwdriver and a hammer (See Fig. 9 & 10). 3. To remove supply duct cover, break front and right side connecting tabs with a screwdriver and a hammer. Push louver down to break rear and left side tabs (See Fig.

  • Page 9: High- -Voltage Connections

    SPECIAL PROCEDURES FOR 208- -V OPERATION CAUTION WARNING UNIT COMPONENT DAMAGE HAZARD ELECTRICAL SHOCK HAZARD Failure to follow this caution may result in damage to the unit being installed. Failure to follow this warning could result in personal injury or death. 1.

  • Page 10: Pre- -Start- -Up

    Table 1—Physical Data- -Unit 50SD UNIT SIZE NOMINAL CAPACITY (ton) 2--1/2 3--1/2 OPERATING WEIGHT (lb.) COMPRESSOR Scroll REFRIGERANT (R- -22) Quantity (lb.) 10.9 10.9 12.3 12.0 ® REFRIGERANT METERING DEVICE AccuRater ORIFICE OD (in.) 0.065 0.070 0.080 0.088 0.088 0.101 OUTDOOR COIL 2…21 Rows…Fins/in.
  • Page 11 Table 3—Electrical Data—50SD ELECTRIC HEAT SINGLE POINT POWER SUPPLY VOLTAGE COMPRESSOR RANGE V- -PH- -HZ UNIT SIZE NOMINAL MOCP --/-- --/-- 16.5/16.5 20/20 3.8/5 18.1/20.8 25.1/28.5 30/30 208/230--1--60 10.9 54.0 5.4/7.2 26.0/30.0 35.0/40.0 35/40 7.5/10.0 36.1/41.7 47.6/54.6 50/60 --/-- --/-- 20.4/20.4 25/25 3.8/5...

  • Page 12: Start- -Up Adjustments

    EXAMPLE: Supply voltage is 230-3-60. AB = 228 v LEGEND BC = 231 v AC = 227 v — Full Load Amps — Locked Rotor Amps 228 + 231 + 227 ® Average Voltage = Minimum Circuit Amps MOCP — Maximum Overcurrent Protection —...
  • Page 13 Table 4—Wet Coil Air Delivery* — Horizontal Discharge (Deduct 10% for 208- -Volt Operation) 230 VOLT HORIZONTAL DISCHARGE EXTERNAL STATIC PRESSURE (IN.WG) UNIT MOTOR SIZE SPEED DELIVERY Watts — — — — — — — — — — Watts — —...
  • Page 14 A05112 Fig. 13 - - Wiring Diagram 208/230- -1- -60...
  • Page 15 A06307 Fig. 14 - - Wiring Diagram 208/230- -3- -60...
  • Page 16 A06485 Fig. 15 - - Wiring Diagram 460- -3- -60...

  • Page 17: Indoor Airflow And Airflow Adjustments

    A05109 Fig. 16 - - Cooling Charging Chart INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS Table 5—Color Coding for 208/230v Motor Leads NOTE: For cooling operation, the recommended airflow is 350 to Black = High Speed 450 cfm for each 12,000 Btuh of rated cooling capacity. Blue = Medium Speed Red = Low Speed Table 4 shows cooling airflows at various external static pressures.

  • Page 18: Maintenance

    NOTE: Once the compressor has started and then has stopped, it 4. Check electrical connections for tightness and controls for proper operation each cooling season. Service when should not be started again until 5 minutes have elapsed. necessary. The cooling cycle remains on until the room temperature drops to a point that is slightly below the cooling control setting of the room 5.

  • Page 19: Outdoor Coil, Indoor Coil, And Condensate Drain Pan

    OUTDOOR COIL, INDOOR COIL, AND CONDENSATE Remove access panel to locate all the electrical controls and wiring. DRAIN PAN Check all electrical connections for tightness. Tighten all screw connections. If any smoky or burned connections are noticed, Inspect the condenser coil, evaporator coil, and condensate drain disassemble the connection, clean all the parts, re- -strip the wire end pan at least once each year.
  • Page 20 Table 6—Troubleshooting Chart SYMPTOM CAUSE REMEDY Power failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective contactor, transformer, control relay, or high-- Replace component pressure, loss--of--charge or low--pressure switch Compressor and outdoor fan will not start Insufficient line voltage Determine cause and correct...
  • Page 21 START-UP CHECKLIST (Remove and Store in Job File) I. Preliminary Information MODEL NO.:_________________________________ SERIAL NO.:__________________________________ DATE:_______________________________________ TECHNICIAN:_________________________________ II. PRE-START-UP (Insert checkmark in box as each item is completed) ( ) VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT ( ) REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS ( ) CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS ( ) CHECK THAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE...
  • Page 22 HEATING & COOLING Catalog No: 50SD---4SI Copyright 2006 Carrier Corporation Printed in the U.S.A. Edition Date: 09/06 Manufacturer reserves the right to change, at any time, specifications and design without notice and without obligation. Replaces: 50SD--- 3SI...

This manual is also suitable for:

50sd02450sd03650sd04250sd04850sd060

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