Table of Contents
Advertisement
Visit www.carrier.com
NOTE: Read the entire instruction manual before starting the
installation.
This symbol → indicates a change since the last issue.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS .....................................................2
Introduction ....................................................................................2
Receiving and Installation..............................................................2
Check Equipment......................................................................2
IDENTIFY UNIT ................................................................2
INSPECT SHIPMENT ........................................................2
Provide Unit Support ................................................................2
ROOF CURB.......................................................................2
SLAB MOUNT ...................................................................2
GROUND MOUNT ............................................................2
Provide Clearances....................................................................2
Rig and Place Unit....................................................................3
INSPECTION ......................................................................3
INSTALLATION ................................................................4
Select and Install Ductwork .....................................................5
CONVERTING HORIZONTAL DISCHARGE UNITS TO
DOWNFLOW (VERTICAL) DISCHARGE UNITS.........7
Provide for Condensate Disposal .............................................7
Install Electrical Connections...................................................8
HIGH-VOLTAGE CONNECTIONS..................................8
ROUTING POWER LEADS INTO UNIT ........................9
CONNECTING GROUND LEAD TO GROUND LUG ..9
ROUTING CONTROL POWER WIRES (24-V) ..............9
Easy Select™—50XZ .........................................................9
50XZ Sequence Of Operation...........................................17
SPECIAL PROCEDURES FOR 208-V OPERATION ...17
PRE-START-UP ..........................................................................18
START-UP ...................................................................................18
50XZ: Start-Up .......................................................................18
Check for Refrigerant Leaks ..................................................19
Start-Up Adjustments..............................................................19
CHECKING COOLING AND HEATING CONTROL OP-
ERATION ..........................................................................19
CHECKING
AND
CHARGE ...........................................................................19
REFRIGERANT CHARGE ..............................................20
NO CHARGE ....................................................................20
LOW CHARGE COOLING .............................................20
TO USE COOLING CHARGING CHARTS ..................20
INDOOR
AIRFLOW
MENTS ..............................................................................20
Defrost Control .......................................................................20
Quiet Shift..........................................................................20
Defrost................................................................................20
MAINTENANCE.........................................................................22
Air Filter..................................................................................23
Indoor Blower and Motor.......................................................23
Outdoor Coil, Indoor Coil, and Condensate Drain Pan ........23
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 101
Catalog No. 535–00114
Tab 5a 5a
Installation, Start-Up,
and Service Instructions
ADJUSTING
REFRIGERANT
AND
AIRFLOW
ADJUST-
Printed in U.S.A.
Single-Packaged Heat Pump Units
with Puron® (R-410A) Refrigerant
Outdoor Fan ............................................................................24
Electrical Controls and Wiring...............................................24
Refrigerant Circuit ..................................................................24
Indoor Airflow ........................................................................24
Metering Devices–TXV & Accurater Piston.........................24
Pressure Switches....................................................................25
Loss of Charge Switch ...........................................................25
High-Pressure Switch..............................................................25
Copeland Scroll Compressor (Puron Refrigerant).................26
Refrigerant System..................................................................26
Refrigerant .........................................................................26
Compressor Oil..................................................................26
Servicing Systems on Roofs with Synthetic Materials ....26
Liquid Line Filter Drier ....................................................26
Puron (R-410A) Refrigerant Charging .............................26
System Information.................................................................26
Loss of Charge Switch ......................................................26
Check Defrost Thermostat ................................................26
TROUBLESHOOTING ...............................................................27
Start-Up Checklist ........................................................................27
NOTE TO INSTALLER — READ THESE INSTRUCTIONS
CAREFULLY AND COMPLETELY before installing this unit.
Also, make sure the Owner's Manual and Service Instructions are
left with the unit after installation.
Fig. 1—Unit 50XZ
Form 50XZ-2SI
50XZ 024–060
Pg 1
8–03
Replaces: 50XZ-1SI
C99064
Advertisement
Table of Contents
Related Manuals for Carrier 50XZ024
Summary of Contents for Carrier 50XZ024
- Page 1 50XZ 024–060 Single-Packaged Heat Pump Units with Puron® (R-410A) Refrigerant Visit www.carrier.com Installation, Start-Up, and Service Instructions NOTE: Read the entire instruction manual before starting the Outdoor Fan ................24 installation. Electrical Controls and Wiring..........24 This symbol → indicates a change since the last issue.
-
Page 2: Safety Considerations
Check all items against shipping list. Immediately notify the nearest Carrier Air Conditioning office if any item is missing. To Improper installation, adjustment, alteration, service, mainte- prevent loss or damage, leave all parts in original packages until nance, or use can cause explosion, fire, electric shock, or installation. -
Page 3: Rig And Place Unit
208/230-1-60,208/230-3-60 41.02 (1041.9) 20.0 (508.0) 14.0 (355.6) 13.0 (330.2) Fig. 2—50XZ024-036 Unit Dimensions Step 4—Rig and Place Unit Follow all applicable safety codes. Wear safety shoes and work gloves. Rigging and handling of this equipment can be hazardous for many... -
Page 4: Installation
C00161 CENTER OF GRAVITY UNIT HEIGHT UNIT WEIGHT IN. (MM) UNIT ELECTRICAL CHARACTERISTICS IN. (MM) ”A” 50XZ042 Not Available At This Time ” ” ” ” ” ” 50XZ048 208/230-1-60, 208/230-3-60 44.98 (1142.5) 19.5 (495.3) 17.6 (447.6) 18.0 (457.2) 50XZ060 208/230-1-60, 208/230-3-60 46.98 (1193.3) 21.0 (533.4) -
Page 5: Select And Install Ductwork
C00071 CORNER WEIGHTS (SMALL CABINET) CORNER WEIGHTS (LARGE CABINET) Unit Unit Total Weight Total Weight Available Available Corner Weight 1 “ Corner Weight 1 “ Corner Weight 2 “ Corner Weight 2 “ Corner Weight 3 “ Corner Weight 3 “... - Page 6 UNIT SIZE ODS CATALOG NUMBER IN. (MM) IN. (MM) IN. (MM) IN. (MM) CPRFCURB006A00 8 (203) 11(279) 161/2 (419) 28-3/4 (730) 50XZ024-036 CPRFCURB007A00 14 (356) 11(279) 161/2 (419) 28-3/4 (730) CPRFCURB008A00 8 (203) 16 3/16 (411) 17 3/8 (441) 40-1/4 (1022)
-
Page 7: Converting Horizontal Discharge Units To Downflow (Vertical) Discharge Units
MAXIMUM ALLOWABLE DIFFERENCE (in.) C99065 Fig. 6—Unit Leveling Tolerances OPTIONAL OPTIONAL RETURN SUPPLY OPENING OPENING 2" EVAP. COIL COND. COIL C99096 Fig. 7—Slab Mounting Detail HANDHOLD HOOK FEED C99067 Fig. 8—Threading Belt 5. Secure all ducts to building structure. Flash, weatherproof, and NOTE: These panels are held in place with tabs similar to an vibration-isolate duct openings in wall or roof according to electrical knockout. -
Page 8: Install Electrical Connections
PLACE RIGGING BRACKET ASSEMBLY IN 4 RIGGING HOLES AND INSTALL TIE DOWN STRAP AROUND PERIMETER OF UNIT AND THROUGH SPACE IN BRACKET ASSEMBLY SEE DETAIL A C99075 UNIT MAXIMUM SHIPPING WEIGHT Size 50XZ024 19.0 482.6 18.25 463.6 50XZ030 “ “ “... -
Page 9: Routing Power Leads Into Unit
Table 1—Physical Data—Unit 50XZ UNIT SIZE 50XZ024 50XZ030 50XZ036 50XZ042 50XZ048 50XZ060 Not Yet Not Yet NOMINAL CAPACITY (ton) Available Available OPERATING WEIGHT (lb.) “ “ COMPRESSOR QUANTITY TYPE SCROLL COMPRESSOR REFRIGERANT R-410A Indoor-TXV REFRIGERANT METERING DEVICE Outdoor-Accurater Refrigerant (R-410A) Quantity (lb.) “... - Page 10 INDOOR THERMOSTAT RETURN FROM TOP COVER POWER SOURCE DISCONNECT PER NEC* *NEC - NATIONAL ELECTRICAL CODE C00063 Fig. 10—Typical Installation Duct Covers C00092 Fig. 11—50XZ with Duct Covers On a pre-programmed table of airflows. marked with a range of heaters for which airflow (also The unit must be configured to operate properly with system marked), is approved.
- Page 11 1” (25mm) MIN. TRAP OUTLET 2” (50mm) MIN. C99013 Fig. 12—Condensate Trap Table 3—Electrical Data—50XZ VOLTAGE COMPRESSOR ELECTRIC HEAT SINGLE POINT POWER SUPPLY UNIT 50XZ ODFM IDFM RANGE V-PH-HZ SIZE Nominal Kw* UNIT MCA MAX FUSE OR CKT BKR MOCP 22.1/22.1 30/30 —...
- Page 12 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 C03005 Fig. 14—Wiring Schematics-50XZ Single Phase...
- Page 14 C03006 Fig. 15—Wiring Schematics-50XZ Three Phase...
- Page 15 HIGH VOLTAGE POWER LEADS POWER (SEE UNIT WIRING SUPPLY LABEL) FIELD-SUPPLIED FUSED DISCONNECT CONTROL BOX BLK(DH) DHUM YEL(Y) THERMOSTAT GRN(G) (TYPICAL) LOW-VOLTAGE POWER LEADS RED(R) (SEE UNIT BRN(C) WIRING LABEL) WHI(W1) GRA(W2) ORN(0) SPLICE BOX LEGEND Field Control-Voltage Wiring Field High-Voltage Wiring C01028 Fig.
- Page 16 (b.) A no blower off delay eliminates cold blow which may be associated with running the blower after TRANSFORMER CONTAINS A MANUAL RESET OVERCURRENT PROTECTOR shut down of the compressor and avoids re- evaporation condensed moisture after IT WILL NOT AUTOMATICALLY RESET cooling/dehumidifying operation.
-
Page 17: Xz Sequence Of Operation
e. ELECTRIC HEATING MODE EASY SELECT BOARD TERMINAL (1.) Thermostat closes circuit R to W/W1, or W2—The BLOCK unit delivers the selected electric heat airflow. There are no on or off delays. f. HEAT PUMP HEATING MODE (1.) Thermostat closes circuits R to G and R to Y/Y2—The HUMIDISTAT unit delivers selected heat pump heating airflow. -
Page 18: Pre-Start-Up
PRE-START-UP 5. Compressors are internally spring mounted. Do not loosen or remove compressor hold-down bolts. 6. Each unit system has 2 Schrader-type ports, one low-side Schrader fitting located on the suction line, and one high-side Failure to observe the following warnings could result in Schrader fitting located on the compressor discharge line. -
Page 19: Check For Refrigerant Leaks
INDOOR COIL OUTDOOR COIL TXV in Metering Position HP S Bypass Position LEGEND HPS – High Pressure Switch LCS – Loss of Charge Switch Accurater ® Metering De vice Arrow indicates direction of flo w C03011 Fig. 24—Typical Heat Pump Operation, Cooling Mode NOTE: Once the compressor has started and then has stopped, it CHECKING COOLING AND HEATING CONTROL OPERA- should not be started again until 5 minutes have elapsed. -
Page 20: Refrigerant Charge
INDOOR COIL OUTDOOR COIL TXV in Bypass Position HP S Metering Position LEGEND HPS – High Pressure Switch LCS – Loss of Charge Switch Accurater ® Metering De vice Arrow indicates direction of flo w C03012 Fig. 25—Typical Heat Pump Operation, Heating Mode and charge to nameplate amount. - Page 21 Table 4A—50XZ Cooling & Heating Dry Coil ECM Airflow Small Cabinet CFM ADJUST LO PIN NOM PIN HI PIN PIN SELECT UNIT SIZE EXTERNAL STATIC 0.0–0.39 0.4–0.69 0.7–1.0 0.0–0.39 0.4–0.69 0.7–1.0 0.0–0.39 0.4–0.69 0.7–1.0 PRESSURE RANGE COOLING † – COOLING –...
-
Page 22: Maintenance
Table 5—FILTER PRESSURE DROP TABLE (In. wg) FILTER SIZE 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 20 X 20 X 1 0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15 — — — —... -
Page 23: Air Filter
Balance Point Worksheet Based on Entering Indoor Air of 70 Deg. F and Rated CFM Outdoor Air Temp (Deg F) C03008 Fig. 26—50XZ Balance Point Worksheet 3. Inspect blower motor and wheel for cleanliness each cooling season. Clean when necessary. Disconnect and tag electrical power to the unit before 4. -
Page 24: Outdoor Fan
Required Liquid Line Temperature for Required Subcooling Deg F (Deg C) a Specific Subcooling (R-410A) Outdoor Ambient Temperature Required Subcooling (Deg F) Required Subcooling (Deg C) Pressure Pressure Model Size 75 (24) 82 (28) 85 (29) 95 (35) 105 (41) (psig) (kPa) 10.3 (5.7) -
Page 25: Pressure Switches
CESO130076–00 Speedup Quiet Defrost interval Pins Shift DIP switches A99442 Fig. 28—Defrost Control pressures are present in the refrigeration circuit. These pressure switches are specifically designed to operate with Puron (R-410A) systems. R-22 pressure switches must not be used as replacements for the Puron (R-410A) system. -
Page 26: Copeland Scroll Compressor (Puron Refrigerant)
To check switch: Exposure, even if immediately cleaned up, may cause embrittle- ment (leading to cracking) to occur in one year or more. When 1. Turn off all power to unit. performing any service that may risk exposure of compressor oil to 2. -
Page 27: Troubleshooting
TROUBLESHOOTING FEEDER TUBE STUB TUBE Refer to the Cooling and Heating Troubleshooting Chart (Table 7) for troubleshooting information. START-UP CHECKLIST DEFROST THERMOSTAT C99029 Fig. 30—Defrost Thermostat NOTE: The defrost thermostat must be located on the liquid side of the outdoor coil on the bottom circuit and as close to the coil as possible. - Page 28 HEAT PUMP WITH PURON REFRIGERATION SECTION-QUICK REFERENCE GUIDE Puron refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment and replacement components are designed to operate with Puron. Puron refrigerant cylinders are rose colored. • Puron refrigerant cylinders manufactured prior to March 1, 1999, have a dip tube that allows liquid to flow out of cylinder in upright position. Cylinders manufactured March 1, 1999 and later DO NOT have a dip tube and MUST be positioned upside down to allow liquid to flow.
- Page 29 QUICK REFERENCE GUIDE SET-UP INSTRUCTIONS FOR WARMER HEATING TEMPERATURES AND SUPER HUMIDITY CONTROL IN COOLING EASY SELECT BOARD 1. Configuration Taps 9 PIN CONNECTOR (See Installation Instructions, for detailed description.) ICM PRINTED CIRCUIT BOARD A. AUX HEAT - Set for heater size (Ex: 0-10 for 10 kw) B.
- Page 30 Table 7—Troubleshooting Chart SYMPTOM CAUSE REMEDY Power Failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective thermostat, contactor, transformer, control relay, defrost board, or high pressure or loss- Replace component of-charge/low pressure switch Compressor and outdoor fan Insufficient line voltage Determine cause and correct...
- Page 31 Table 7—Troubleshooting Chart (Cont’d) SYMPTOM CAUSE REMEDY Low refrigerant charge Check for leaks, repair and recharge Head pressure too low Restriction in liquid tube Remove restriction Move timer on control board to 30 minutes (Heat) Outdoor coil frosted between defrost cycles (Cool) High Heat load Check for source and eliminate Excessive suction pressure...
- Page 32 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 GAS PIPING FOR LEAKS (WHERE APPLICABLE)
Need help?
Do you have a question about the 50XZ024 and is the answer not in the manual?
Questions and answers