Table of Contents
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25HNA
Infinityt Series Heat Pump
with Puronr Refrigerant
2 To 5 Nominal Tons (Sizes 24 to 60)
the environmentally sound refrigerant
Fig. 1 − 25HNA6 / 25HNA9
NOTE: Read the entire instruction manual before starting the
installation.
Unless otherwise noted, information in these installation
instructions pertain to both 25HNA6 and 25HNA9 series units.
Information that is unique to the 25HNA6 series will be identified
as such; likewise information that is unique to the 25HNA9 series
will also be identified.
Indoor Thermostat Control Options
Infinity
Model
Control
25HNA6
Yes
25HNA9
Yes
Installation Instructions
A05240
Standard
2−stage
Thermostat
Yes
No
(Emergency
Mode Only)
TABLE OF CONTENTS
INSTALLATION
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Step 2 − Install on Solid Pad
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Step 7 − Install Liquid−Line Solenoid Valve (LSV)
Step 9 − Make Electrical Connections
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PURONR REFRIGERANT QUICK REF. GUIDE
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Table of Contents
Related Manuals for Carrier 25HNA Infinity Series
Summary of Contents for Carrier 25HNA Infinity Series
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Page 1: Table Of Contents
25HNA Infinityt Series Heat Pump with Puronr Refrigerant 2 To 5 Nominal Tons (Sizes 24 to 60) Installation Instructions TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS ..... . . INSTALLATION RECOMMENDATIONS . -
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: Step 1 − Check Equipment & Job Site
INSTALLATION NOTE: Avoid contact between tubing and structure. OUTDOOR WALL INDOOR WALL CAULK LIQUID TUBE VAPOR TUBE INSULATION THROUGH THE WALL JOIST HANGER STRAP (AROUND VAPOR INSULATION TUBE ONLY) VAPOR TUBE TIEDOWN KNOCKOUT LOCATIONS UNIT BASE PAN DIMENSIONS 28−3/4 1” MIN. 36−1/2 x 40 11−5/8 6−13/16... -
Page 4: Step 6 − Install Txv
7. Connect equalizer tube of TXV to 1/4−in. equalizer fitting CAUTION on vapor line adapter. 8. Attach TXV bulb to horizontal section of suction line using clamps provided. Insulate bulb with field−supplied UNIT OPERATION HAZARD insulation tape. See Fig. 4 for correct positioning of Failure to follow this caution may result in equipment sensing bulb. -
Page 5: Step 8 Make Piping Connections
Step 7 In Long−Line Applications, Install Liquid−Line CAUTION Solenoid Valve (LSV) For refrigerant piping arrangements with equivalent lengths greater than 80 ft. and/or when elevation difference between UNIT DAMAGE HAZARD indoor and outdoor unit is greater than ±20 ft., follow all Failure to follow this caution may result in equipment requirements of the Long−Line Guideline—Air Conditioners and damage or improper operation. - Page 6 Table 2—Accessory Usage REQUIRED FOR REQUIRED FOR LONG LINE REQUIRED FOR SEA ACCESSORY LOW−AMBIENT APPLICATIONS APPLICATIONS* COAST APPLICATIONS (Below 55 5F) (Over 80 ft.) (Within 2 miles) Crankcase Heater Standard Standard Standard Standard with Infinityt Control Evaporator Freeze Protection (Low Ambient not allowed with non− communicating thermostat) Standard with Infinity Control Winter Start Control...
- Page 7 Evacuate Refrigerant Tubing and Indoor Coil EVACUATE CAUTION BREAK VACUUM WITH DRY NITROGEN WAIT UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment EVACUATE damage or improper operation. Never use the system compressor as a vacuum pump. BREAK VACUUM WITH DRY NITROGEN WAIT Refrigerant tubes and indoor coil should be evacuated using the...
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Page 8: Step 10 Compressor Crankcase Heater
Step 10 Compressor Crankcase Heater WARNING Furnish power to crankcase heater a minimum of 24 hr before starting unit. To furnish power to heater only, set thermostat to ELECTRICAL SHOCK HAZARD OFF and close electrical disconnect to outdoor unit. Failure to follow this warning could result in personal NOTE: On 25HNA6 models, starting the compressor without a injury or death. -
Page 9: Step 13 Start−Up
NOTE: For 25HNA6 Series only using non−communicating NOTE: Only one code will be displayed on the outdoor unit (non−Infinity) thermostat. Carrier electronic thermostats are control board (the most recent, with the highest priority). equipped with a 15−minute staging timer. This timer prevents the Utility Interface two−stage system from operating at high stage until unit has been... - Page 10 One Minute Stage Change Time Delay on 25HNA6 Models Time Delays When compressor changes stages from high to low or low to The unit time delays include: high, there is a 1−minute time delay before compressor restarts. Five minute time delay to start cooling or heating The outdoor fan motor remains running.
- Page 11 MODEL PLUG MODEL PLUG UTILITY RELAY UTILITY SIGNAL OPEN RELAY SUPPLIED BY UTILITY PROVIDER Liquid Line Solenoid A06525 A06526 Fig. 9 − 2−Stage Control Board GENERAL INFORMATION Defrost Low Ambient Cooling This control offers 5 possible defrost interval times: 30, 60, 90, 120 minutes, or AUTO.
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Page 12: Step 15 Check Charge
Defrost Hold Step 15 Check Charge On 25HNA6 models, in a non−communicating system, if the Unit Charge thermostat becomes satisfied (Y1 or Y1 and Y2) before the Factory charge and charging method are shown on unit defrost cycle is terminated, the control will “hold” in defrost information plate. - Page 13 Heating Check Chart Procedure NOTE: When charging is necessary during heating season, charge must be weighed in accordance with unit rating plate, To check system operation during heating cycle, refer to the Heat ±0.6 oz./ft. of 3/8−in. liquid−line above or below 15 ft., Pump Charging Instructions label on outdoor unit.
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Page 14: Major Components
MAJOR COMPONENTS TROUBLESHOOTING 2−Stage Control Board Systems Communication Failure The HP control board controls the following functions: If communication with the Infinity control is lost with the User Interface, the control will flash the appropriate fault code. (See High and low stage compressor contactor operation Table 7.) Check the wiring to the UI and the indoor and outdoor Outdoor fan motor operation units. - Page 15 Compressor Voltage Sensing stage starts, high stage operation is locked out for 30 minutes. The control will flash the appropriate fault code. The control board input terminals labeled VS, VR and L2 on Troubleshooting 25HNA6 units for proper switching between 25HNA6 models and VS and L2 on 25HNA9 models (see Fig.
- Page 16 Thermistor Sensor Comparison Failed Thermistor Default Operation The control continuously monitors and compares the outdoor air Factory defaults have been provided in the event of failure of temperature sensor and outdoor coil temperature sensor to ensure outdoor air thermistor (OAT) and/or outdoor coil thermistor proper operating conditions.
- Page 17 THERMISTOR CURVE TEMPERATURE (DEG. F) A91431 Fig. 12 − Resistance Values Versus Temperature Table 6—Two−Stage Compressor Resistances (Winding Resistance at 70_F±20_) Winding 25HNA624 25HNA636 25HNA648 25HNA660 Start (S−C) 2.74 1.98 1.55 0.74 Run (R−C) 0.80 0.75 0.48 0.36 Winding 25HNA924 25HNA936 25HNA948 25HNA960...
- Page 18 Table 7—TROUBLESHOOTING AMBER OPERATION FAULT POSSIBLE CAUSE AND ACTION FLASH CODE Standby – no call for unit opera- On solid, None Normal operation tion no flash Standard Thermo- Rapid, con- Unit being controlled by standard thermostat inputs instead of Infinity Con- Emergency Mode −...
- Page 19 INDOOR CONTROL FAN COIL 2-SPEED HEAT PUMP HybridHeatm TWO−STAGE O/W2 RVS COOLING HEAT/COOL Y1/W2 STAGE 1 W/W1 HEAT STAGE 3 REMOVE J2 JUMPER FOR HEAT/COOL Y/Y2 STAGE 2 HEAT STAGING Y/Y2 24 VAC HOT REMOVE J1 FOR DEHUMIDIFY DHUM DEHUMIDIFY MODES 24 VAC COMM HUMIDIFIER...
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Page 20: Final Checks
S Observe all warnings, cautions, and bold text. S All indoor coils must be installed with a hard−shutoff Puron refrigerant TXV metering device. Catalog No: 25HNA−3SI Copyright 2006 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Printed in U.S.A. Edition Date:09/06 Replaces:25HNA−2SI...
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