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Carrier Performance 50NR Installation Instructions Manual
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Carrier Performance 50NR Installation Instructions Manual

Carrier Performance 50NR Installation Instructions Manual

Up to 16 seer2 2-stage packaged heat pump system with puron advance r-454b refrigerant single and three phase 2-5 nominal tons sizes 24-60
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5
50NR
Performance™ Up to 16 SEER2 2-Stage Packaged
Heat Pump System with Puron Advance™ (R-454B)
Refrigerant
Single and Three Phase
2-5 Nominal Tons (Sizes 24-60)
IMPORTANT: Effective January 1, 2015, all split system and packaged
air conditioners must be installed pursuant to applicable regional
efficiency standards issued by the Department of Energy.
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.
Fig. 1 - Unit 50NR

Table of Contents

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Receiving and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Identify Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Inspect Shipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Slab Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
High-Voltage Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Special Procedures for 208-V Operation . . . . . . . . . . . . . . . . . 10
Control Voltage Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Standard Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Leak Dissipation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Leak Dissipation Control Board (DSB) . . . . . . . . . . . . . . . . . . 11
Transformer Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Pre-Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Checking and Adjusting Refrigerant Charge . . . . . . . . . . . . . . 15
Indoor Airflow and Airflow Adjustments . . . . . . . . . . . . . . . . 16
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Demand Defrost Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Installation Instructions
5) . . . . . . . . . . . . . . . . . . . . . . 8
Indoor Blower and Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Outdoor Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Electrical Controls and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 30
Refrigerant Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Evaporator Airflow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Metering Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Pressure Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Loss of Charge Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
High-Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Copeland Scroll Compressor (Puron Advance [R-454B] Refriger-
ant) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Compressor Oil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Synthetic Roof Precautionary Procedure . . . . . . . . . . . . . . . . . 32
Liquid Line Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Loss of Charge Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Check Defrost Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Start-up Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Start-Up Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
A09033
Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
This unit is equipped with electrically powered safety measures. For the
safety measures to be effective, the unit must be electrically powered at
all times after installation, other than when servicing.
Continuous fan mode required for proper functioning. Installation must
meet the Required Minimum Dissipation Airflow as outlined in the
Leak Dissipation System section. Follow instructions in the Continuous
Fan Speed Set-Up section to change speeds.
Improper installation adjustment, alteration, service, maintenance, or use
can cause explosion, fire, electrical shock, or other conditions which
may cause death, personal injury, or property damage. Consult a
qualified installer, service agency, or your distributor or branch for
information or assistance. The qualified installer or agency must use
factory-authorized kits or accessories when modifying this product Refer
to the individual instructions packaged with the kits or accessories when
installing.
Auxiliary devices which may be a POTENTIAL IGNITION SOURCE
shall not be installed in the duct work. Examples of such POTENTIAL
IGNITION SOURCES are hot surfaces with a temperature exceeding
1292°F (700°C) and electric switching devices.

Safety Considerations

WARNING
!

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Summary of Contents for Carrier Performance 50NR

  • Page 1: Table Of Contents

    50NR Performance™ Up to 16 SEER2 2-Stage Packaged Heat Pump System with Puron Advance™ (R-454B) Refrigerant Single and Three Phase 2-5 Nominal Tons (Sizes 24-60) Installation Instructions IMPORTANT: Effective January 1, 2015, all split system and packaged Indoor Blower and Motor ......29 air conditioners must be installed pursuant to applicable regional Outdoor Coil, Indoor Coil, and Condensate Drain Pan .

  • Page 2: Electrical Shock Hazard

    Electrostatic air purifiers installed in the ductwork are permitted, if the CAUTION purifier has an airflow sensor. False ceilings or drop ceilings must not be used as a return air CUT HAZARD duct/plenum. Failure to follow this caution may result in personal injury. This self-contained unit is already charged with refrigerant for optimum When removing access panels (see Fig.

  • Page 3: Step 2 - Provide Unit Support

    50NR: Installation Instructions If the unit is to be mounted on a curb in a downflow application, review Step 7 to determine which method is to be used to remove the downflow panels before rigging and lifting into place. The panel removal process may require the unit to be on the ground.
  • Page 4 50NR: Installation Instructions A250108 Fig. 2 – 50NR24 Unit Dimensions Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 5 50NR: Installation Instructions A250109 Fig. 3 – 50NR 36-60 Unit Dimensions Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 6 50NR: Installation Instructions SMALL/COMMON CURB SMALL SUPPLY BASE UNIT LARGE BASE RETURN UNIT UNIT PLACEMENT ON COMMON CURB SMALL OR LARGE BASE UNIT LARGE CURB A180216 (small/common UNIT CATALOG (large base) base) SIZE NUMBER IN. (mm) IN. (mm) (mm) IN. (mm)* (mm) (mm) (mm)
  • Page 7 50NR: Installation Instructions CAUTION - NOTICE TO RIGGERS PRUDENCE - AVIS AUX MANIPULATEUR ACCESS PANELS MUST BE IN PLA CE WHEN RIGGING. PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION. Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition DUCTS MINIMUM HEIGHT: 36"...

  • Page 8: Inspection

    50NR: Installation Instructions OPTIONAL OPTIONAL RETURN SUPPLY OPENING OPENING MAXIMUM ALLOWABLE DIFFERENCE in. (mm) (6.35) (6.35) (6.35) (50.8mm) A07925 Fig. 6 – Unit Leveling Tolerances Inspection EVAP. COIL COND. COIL Prior to initial use, and at monthly intervals, all rigging shackles, clevis A07926 Fig.

  • Page 9: Configuring Units For Downflow (Vertical) Discharge

    50NR: Installation Instructions weather-tight and airtight seal. When electric heat is installed, use Air Conditioning Contractors National Association (SMACNA) fireproof canvas (or similar heat resistant material) connector between and Air Conditioning Contractors of America (ACCA) minimum ductwork and unit discharge connection. If flexible duct is used, insert a installation standards for heating and air conditioning systems.

  • Page 10: High-Voltage Connections

    50NR: Installation Instructions CAUTION UNIT COMPONENT DAMAGE HAZARD Failure to follow this caution may result in damage to the unit being installed. Make all electrical connections in accordance with NFPA 70 (NEC) (latest edition) and local electrical codes governing such wiring.

  • Page 11: Leak Dissipation System

    50NR: Installation Instructions If an accessory electric heater is installed, low voltage leads from heater must be connected to factory supplied control leads from Indoor Fan Board P4 connector. NOTE: If the unit 24V wires do not have a matching receptacle, cut the 24V wires from the electric heater plug, strip the ends, and wire nut together to match the schematic connections.

  • Page 12: Transformer Protection

    50NR: Installation Instructions Table 2 – Required Operational Checks to Ensure Proper Dissipation System Function Indoor Electric/Gas Test # T-Stat Call Compressor Heat Normal Operation None Cool Heat Dissipation Activated None Cool Heat Required Minimum Dissipation Airflow The Required Minimum Dissipation Airflow is listed in Table 3, is based on refrigerant charge, and must be met or exceeded in Continuous Fan...
  • Page 13 50NR: Installation Instructions Table 3 – Physical Data UNIT SIZE NOMINAL CAPACITY (ton) SHIPPING WEIGHT lb. SHIPPING WEIGHT (kg) COMPRESSORS Scroll Quantity REFRIGERANT (R-454B) Quantity lb 8.25 8.75 10.0 15.5 Quantity (kg) REFRIGERANT METERING DEVICE TXV, Indoor TXV MINIMUM CONDITIONED SPACE AREA (SQ. FT.) ORIFICE ID (in.) .032 (2)

  • Page 14: Pre-Start-Up

    50NR: Installation Instructions Pre-Start-up 1. Place room thermostat SYSTEM switch or MODE control in OFF position. Observe that blower motor starts when FAN mode is WARNING placed in FAN ON position and shuts down when FAN MODE switch is placed in AUTO position. Thermostat: ENVIRONMENTAL, FIRE, EXPLOSION, ELECTRICAL On a typical two stage thermostat, when the room temperature rises...

  • Page 15: Step 3 - Start-Up Adjustments

    50NR: Installation Instructions Checking and Adjusting Refrigerant Charge used to detect refrigerant leaks, but in the case of R-454B, the sensitivity may not be adequate or may need re-calibration WARNING (Detection equipment shall be calibrated in a refrigerant-free area). Leak detection equipment shall be calibrated to R-454B. If a leak above 20% of the LFL is found, proceed to recovery.

  • Page 16: Indoor Airflow And Airflow Adjustments

    50NR: Installation Instructions Indoor Airflow and Airflow Adjustments High Stage Cooling/Heat Pump: Using Table 7 Table 8, find the external static pressure drops for wet coil, economizer, and filter, and WARNING add them to dry coil measured on the system. Using this total static pressure, use Table 7 to find the airflows available at the total static...
  • Page 17 50NR: Installation Instructions the control will lengthen the defrost interval by 15 minutes, up to a shorten the defrost interval by 15 minutes, down to a minimum of 30 maximum of 120 minutes or 30 minutes greater than the original minutes or 30 minutes from the original setpoint, whichever is first.
  • Page 18 50NR: Installation Instructions C03012 Fig. 15 – Typical Heat Pump Operation, Heating Mode C03011 Fig. 16 – Typical Heat Pump Operation, Cooling Mode Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 19 Table 7 – Dry Coil Air Delivery* - Horizontal and Downflow Discharge Sizes 24-60 208-230VAC - 1 Phase/3 Phase ESP (in. W.C.) Unit Size Motor Speed Blue 0.10 0.11 0.11 0.12 0.12 0.13 0.13 Med-Low** Pink 0.15 0.14 0.14 0.15 0.15 0.16 0.17...
  • Page 20 Table 8 – Dry Coil Air Delivery* - Horizontal and Downflow Discharge Sizes 36-60 460 VAC - 3 Phase ESP (in. W.C.) Unit Size Motor Speed 1064 Low† Blue 0.26 0.26 0.27 0.29 0.31 0.32 0.34 0.36 0.38 0.39 1182 1124 1067 1007...
  • Page 21 Table 10 – Ecnoomizer with 1-in. Filter Pressure Drop (IN. W.C.) Cooling Standard CFM (SCFM) Filter Size in. (mm) Tons 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 600-1400 CFM 12x20x1+12x20x1 0.04 0.05 0.07 0.09 0.14 0.16 0.18 0.25...
  • Page 22 50NR: Installation Instructions A250103 Fig. 17 – Connection Wiring Diagram 208/230-1-60 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 23 50NR: Installation Instructions A250104 Fig. 18 – Ladder Wiring Diagram 208/230-1-60 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 24 50NR: Installation Instructions A250105 Fig. 19 – Connection Wiring Diagram 208/230-3-60 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 25 50NR: Installation Instructions A250106 Fig. 20 – Ladder Wiring Diagram 208/230-3-60 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 26 50NR: Installation Instructions A250110 Fig. 21 – Connection Wiring Diagram 460-3-60 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 27 50NR: Installation Instructions A250111 Fig. 22 – Ladder Wiring Diagram 460-3-60 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
  • Page 28 50NR: Installation Instructions A250107 Fig. 23 – Cooling Charging Chart Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

  • Page 29: Maintenance

    50NR: Installation Instructions Maintenance cooling season and twice during the heating season, or whenever the filter becomes clogged with dust and lint. To ensure continuing high performance, and to minimize the possibility Indoor Blower and Motor of premature equipment failure, periodic maintenance must be NOTE: All motors are pre-lubricated.

  • Page 30: Outdoor Coil, Indoor Coil, And Condensate Drain Pan

    50NR: Installation Instructions FAN GRILLE MOTOR MOTOR SHAFT A08505 MAX DISTANCE BETWEEN TOP OF FAN GRILLE AND BOTTOM OF FAN BLADE “A” Size Fig. 24 – Fan Blade Position Inspect the drain pan and condensate drain line when inspecting the coils.

  • Page 31: Refrigerant Circuit

    50NR: Installation Instructions with the proper electrical instrumentation. Refer to the unit wiring label kPa). High pressure may be caused by a dirty condenser coil, failed fan when making these checkouts. motor, or condenser air recirculation. NOTE: Refer to the heating and/or cooling sequence of operation in To check switch: this publication as an aid in determining proper control operation 1.

  • Page 32: Servicing Systems On Roofs With Synthetic Materials

    50NR: Installation Instructions Servicing Systems on Roofs with Synthetic Materials FEEDER TUBE POE (polyolester) compressor lubricants are known to cause long term damage to some synthetic roofing materials. Exposure, even if STUB TUBE immediately cleaned up, may cause embrittlement (leading to cracking) to occur in one year or more.
  • Page 33 50NR: Installation Instructions Table 13 – 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 or high-pressure, Replace component loss-of-charge or low-pressure switch Compressor and outdoor fan will not start Insufficient line voltage Determine cause and correct Incorrect or faulty wiring...

  • Page 34: Preliminary Information

    50NR: Installation Instructions A240111 Start-Up Checklist (Remove and Store in Job Files) I. PRELIMINARY INFORMATION MODEL NO.: ____________________________________________ SERIAL NO.: ____________________________________________ DATE: __________________________________________________ TECHNICIAN: ___________________________________________ II. PRESTART-UP (Insert check mark 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 35: Decommissioning

    Access My Learning Center with your HVACpartners credentials at www.mlctraining.com. Please contact us a mylearning@carrier.com with questions. © 2025 Carrier. All rights reserved. Edition Date: 03/25 Catalog No: 50NR-01SI Replaces: NEW Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.