Table of Contents
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25HBA
BASET SERIES PURONR REFRIGERANT HEAT PUMPS
SIZES 018 TO 060
1 1/2 TO 5 NOMINAL TONS
Fig. 1 - - 25HBA Standard Grille Unit
NOTE:Read the entire instruction manual before starting the
installation.
Installation Instructions
A05341
TABLE OF CONTENTS
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Table of Contents
Related Manuals for Carrier 25hba
Summary of Contents for Carrier 25hba
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Page 1: Table Of Contents
......A05341 Fig. 1 - - 25HBA Standard Grille Unit Step 14 - - Final Checks . -
Page 2: Safety Considerations
SAFETY CONSIDERATIONS INSTALLATION RECOMMENDATIONS Improper installation, adjustment, alteration, service, NOTE: In some cases noise in the living area has been traced to maintenance, or use can cause explosion, fire, electrical shock, or gas pulsations from improper installation of equipment. other conditions which may cause death, personal injury, or 1. -
Page 3: Installation
INSTALLATION On rooftop applications, locate unit at least 6 in. above roof surface. Step 1.—Check Equipment and Job Site Step 4.—Operating Ambient UNPACK UNIT The minimum outdoor operating ambient in cooling mode is Move to final location. Remove carton taking care not to damage 55°F, and the maximum outdoor operating ambient in cooling unit. - Page 4 Valve is more susceptible to malfunction due to debris if inlet tube REPLACING TXV ON R- -22 INDOOR COIL is facing down. A factory- -approved filter drier must be installed in 1. Pump system down to 2 psig and recover refrigerant. the liquid line.
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Page 5: Step 7.-Check Defrost Thermostat
Step 7.—Check Defrost Thermostat Step 8.—Make Piping Connections WARNING Check defrost thermostat to ensure it is properly located and securely attached. There is a liquid header with a brass distributor and feeder tube going into outdoor coil. At the end of the one of the feeder tubes, there is a 3/8 in. - Page 6 Table 1—Accessory Usage REQUIRED FOR LOW---AMBI- REQUIRED FOR SEA REQUIRED FOR LONG LINE Accessory ENT APPLICATIONS COAST APPLICATIONS APPLICATIONS* (Over 80 Ft) (Below 55 °F) (Within 2 miles) Crankcase Heater Evaporator Freeze Thermostat Winter Start Control Accumulator Compressor Start Assist Capacitor and Relay Motor Master®...
- Page 7 OUTDOOR UNIT CONNECTED TO FACTORY APPROVED INDOOR UNIT These outdoor units are carefully evaluated and listed with specific indoor coils for proper system performance. IMPORTANT: Do not apply indoor coils which are not factory approved to these units. INSTALL ADAPTER TUBE 1.
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Page 8: Step 9.-Make Electrical Connections
DEEP VACUUM METHOD FINAL TUBING CHECK The deep vacuum method requires a vacuum pump capable of IMPORTANT: Check to be certain factory tubing on both indoor pulling a vacuum of 500 microns and a vacuum gage capable of and outdoor unit has not shifted during shipment. Ensure tubes are accurately measuring this vacuum depth. -
Page 9: Step 10.-Compressor Crankcase Heater
CONNECT GROUND AND POWER WIRES Step 12.—Start- -Up Connect ground wire to ground connection in control box for CAUTION safety. Connect power wiring to contactor as shown in Fig. 10. DISCONNECT PER N. E. C. AND/OR UNIT OPERATION AND SAFETY HAZARD LOCAL CODES Failure to follow this caution may result in minor personal injury, CONTACTOR... - Page 10 FOLLOW THESE STEPS TO PROPERLY START UP HEAT TYPICAL HP THERMOSTAT PUMP FAN COIL SYSTEM: 1. After system is evacuated, fully open liquid and vapor service valves. 24 VAC HOT 2. Unit is shipped with valve stem(s) closed and caps installed. Replace stem caps after system is opened to refrigerant flow (back 24 VAC COM seated).
- Page 11 SEQUENCE OF OPERATION DEFROST Turn on power to indoor and outdoor units. Transformer is The defrost control is a time/temperature control which includes a energized with power supplied. field selectable time period of 30, 60, or 90 minutes, factory set to 90 minutes.
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Page 12: Step 13.-Check Charge
Step 13.—Check Charge HEATING CHECK CHART PROCEDURE Factory charge and charging method are shown on unit rating To check system operation during heating cycle, refer to the plate. To check charge in cooling mode, refer to Cooling Only Heating Check Chart on outdoor unit. This chart indicates Procedure. - Page 13 Table 4—Required Liquid- -Line Temperature Liquid Liquid Pressure Pressure Required Subcooling Temperature Required Subcooling Temperature °F) °F) at Service at Service Valve Valve (PSIG) (PSIG)
- Page 14 S Observe all warnings, cautions, and bold text. S All indoor coils must be installed with a hard shutoff Puron TXV metering device. Printed in U.S.A. Copyright 2005 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Edition Date: 11/05 Replaces: NEW Catalog No: 25HBA--- 1SI Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.