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50CR
Infinityt Single- -Packaged Heat Pump Units
®
With Puron
(R- -410A) Refrigerant
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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Table of Contents
Related Manuals for Carrier 50CR
Summary of Contents for Carrier 50CR
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Page 1: Table Of Contents
50CR Infinityt Single- -Packaged Heat Pump Units ® With Puron (R- -410A) Refrigerant 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. TABLE OF CONTENTS Page SAFETY CONSIDERATIONS... -
Page 2: Safety Considerations
Check all items local and national building codes. Wear safety glasses, protective against shipping list. Immediately notify the nearest Carrier Air clothing, and work gloves. Have fire extinguisher available. Read Conditioning office if any item is missing. To prevent loss or these instructions thoroughly and follow all warnings or cautions damage, leave all parts in original packages until installation. - Page 3 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 4 MAXIMUM ALLOWABLE DIFFERENCE (in.) C99065 Fig. 3 - - Unit Leveling Tolerances OPTIONAL OPTIONAL RETURN SUPPLY OPENING OPENING 2" EVAP. COIL COND. COIL C99096 Fig. 4 - - Slab Mounting Detail A06114 Fig. 5 - - Corner Weights (Lbs.) CORNER WEIGHTS (SMALL CABINET) CORNER WEIGHTS (LARGE CABINET) Unit Unit...
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Page 7: Rig And Place Unit
Step 4—Rig and Place Unit USE OF RIGGING BRACKET Rigging and handling of this equipment can be hazardous for many Field Installation of Rigging Bracket reasons due to the installation location (roofs, elevated structures, 1. If applicable, remove unit from shipping carton. Leave top etc.). - Page 8 DETAIL C03017 Fig. 8 - - Rigging Bracket Under Unit Rain Lip A06113 MAXIMUM SHIPPING WEIGHT UNIT SIZE 50CR024 50CR030 50CR036 50CR042 50CR048 50CR060 Fig. 9 - - Suggested Rigging...
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Page 9: Select And Install Ductwork
Step 5—Select and Install Ductwork CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE UNITS The design and installation of the duct system must be in accordance with the standards of the NFPA for installation of non- -residence WARNING type air conditioning and ventilating systems, NFPA 90A or residence type, NFPA 90B and/or local codes and ordinances. - Page 10 Table 1—Physical Data - - Unit 50CR UNIT SIZE NOMINAL CAPACITY (ton) 2--1/2 3--1/2 OPERATING WEIGHT (lb.) Compressor Scroll Refrigerant (R- -410A) Quantity (lb.) 10.8 11.5 14.0 REFRIGERANT METERING DEVICE 0.038 (Left OD Coil) 0.042 (Left OD Coil) ORIFICE OD (in.) 0.035 (2) 0.035 (2) 0.038 (2)
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Page 11: Install Electrical Connections
CAUTION UNIT COMPONENT DAMAGE HAZARD Failure to follow this caution may result in damage to the unit being installed. 1. Make all electrical connections in accordance with NEC ANSI/NFPA (latest edition) and local electrical codes governing such wiring. In Canada, all electrical connections must be in accordance with CSA standard C22.1 Canadian Electrical Code Part 1 and applicable local codes. - Page 12 Table 2—Electrical Data—50CR SINGLE POINT POWER ELECTRIC HEAT VOLTAGE V- -PH- -HZ SUPPLY COMPRESSOR RANGE UNIT SIZE NOMINAL MOCP --/-- --/-- 22.1/22.1 30/30 3.8/5 18.1/20.8 44.6/48.1 50/50 208/230--1--60 13.5 61.0 5.4/7.2 26.0/30.0 54.6/59.6 60/60 7.5/10.0 36.1/41.7 67.2/74.2 70/80 --/-- --/-- 25.1/25.1 30/30 3.8/5...
- Page 13 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 14 A05304 Fig. 15 - - Wiring Schematics- -50CR Single Phase...
- Page 15 A05259 Fig. 16 - - Wiring Schematics- -50CR Three Phase...
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Page 16: Accessory Installation
ACCESSORY INSTALLATION GROUND SCREW (IN SPLICE BOX) A. Accessory Electric Heaters Electric heaters may be installed in 50CR per instructions supplied GROUND LEAD with electric heater package. See unit rating plate for factory- -approved electric heater kits. SINGLE-PHASE NOTE: Units installed without electric heat should have a CONNECTIONS factory- -supplied sheet metal block- -off plate installed over heater TO DISCONNECT... -
Page 17: Pre- -Start- -Up
3. Make the following inspections: a. Inspect for shipping and handling damages, such as broken lines, loose parts, disconnected wires, etc. b. Inspect for oil at all refrigerant tubing connections and on SEC-2 SEC-1 unit base. Detecting oil generally indicates a refrigerant leak. - Page 18 10 seconds). Once communications with User Interface are 2. Recheck airflow and system static pressure using User successful, COMM LED will be lit and held on. At the same time, Interface service screens with access panel in place. amber STATUS LED will be lit and held continuously on until a NOTE: Blower motor faults will not cause a lockout of blower request for operating mode is received.
- Page 19 When the motor is commanded to stop, the MOTOR LED will be 2. If symptoms persist, disconnect wiring harness at unit turned off. The MOTOR LED will not flash to indicate control board and check for a resistance value greater than communications when it is turned off.
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Page 20: Sequence Of Operation
Check system wiring to be sure the User Interface is powered and NOTE: Once the compressor has started and then has stopped, it connections are made A to A, B to B, etc., and wiring is not shorted. should not be started again until 4 minutes have elapsed. The Mis- -wiring or shorting of the ABCD communications wiring will cooling cycle remains “on”... - Page 21 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. 20 - - Typical Heat Pump Operation, Cooling Mode INDOOR COIL OUTDOOR COIL TXV in Bypass...
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Page 22: Checking And Adjusting Refrigerant Charge
CHECKING AND ADJUSTING REFRIGERANT CHARGE When Quiet Shift switch is placed in ON position, and a defrost is initiated, the following sequence of operation will occur. Reversing The refrigerant system is fully charged with Puron (R- -410A) valve will energize, outdoor fan will turn off, compressor will turn refrigerant and is tested and factory sealed. - Page 23 Required Subcooling oF (oC) Required Liquid Line Temperature for a Specific Subcooling (R-410A) Outdoor Ambient Temperature Required Subcooling ( Required Subcooling ( Model Size 75 (24) 82 (28) 85 (29) 95 (35) 105 (41) Pressure Pressure (kPa) (psig) 10.3 ( 5.7 ) 9.8 ( 5.4 ) 9.4 ( 5.2 ) 9 ( 5 )
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Page 24: Maintenance
Table 6—Electric Heat Pressure Drop Table Large Cabinet: 042- -060 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 0.00 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 7.2 kw 0.00 0.00... -
Page 25: Air Filter
The minimum maintenance requirements for this equipment are as Step 4—Outdoor Fan follows: CAUTION 1. Inspect air filter(s) each month. Clean or replace when necessary. 2. Inspect indoor coil, drain pan, and condensate drain each UNIT OPERATION HAZARD cooling season for cleanliness. Clean when necessary. Failure to follow this caution may result in damage to unit 3. -
Page 26: Refrigerant Circuit
Balance Point Worksheet Based on Entering Indoor Air of 70 Deg. F and Rated CFM Outdoor Air Temp (Deg F) C03008 Fig. 25 - - 50CR Balance Point Worksheet Step 6—Refrigerant Circuit Inspect all refrigerant tubing connections and the unit base for oil accumulation annually. -
Page 27: Loss- -Of- -Charge Switch
airflow across indoor coil, dirty filters, etc. It opens on a pressure REFRIGERANT drop at about 20 psig. If system pressure is above this, switch should CAUTION be closed. To check switch: 1. Turn off all power to unit. 2. Disconnect leads on switch. PERSONAL INJURY, UNIT OPERATION HAZARD 3. -
Page 28: System Information
Step 14—System Information Unit Top LOSS- -OF- -CHARGE SWITCH The loss of charge switch is a protective device wired into control circuit (low voltage). It shuts off the compressor if abnormally low Defrost pressures are present in the refrigeration circuit. Sensor NOTE: Because these switches are attached to refrigeration system under pressure, it is not advisable to remove this device for... - Page 29 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.
- 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 contactor, transformer, control relay, defrost Replace component board, or high--pressure, loss-- of--charge or low--pressure switch Insufficient line voltage Determine cause and correct Compressor and outdoor fan will not start...
- 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 (Cool) High Heat load Check for source and eliminate Excessive suction pressure Reversing valve hung up or leaking internally Replace valve Refrigerant overcharged Recover excess refrigerant...
- Page 32 Catalog No: 50CR--- 1SI Printed in U.S.A. Edition Date: 03/06 Copyright 2006 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Replaces: New Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.