Table of Contents
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25VNA4
Infinity™ Variable Speed Heat Pump
with Greenspeed™ Intelligence
2 to 5 Nominal Tons
NOTE: Read the entire instruction manual before starting the installation.
This marker indicates a change from prior revision.
Table of contents
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Inverter Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Step 1 - Check Equipment and Job Site . . . . . . . . . . . . . . . . . . . . . . . . 3
Unpack Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Inspect Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Step 2 - Install on a Solid, Level Mounting Pad . . . . . . . . . . . . . . . . . 3
Step 3 - Clearance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step 4 - Operating Ambient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step 5 - Elevate Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
(LSV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step 7 - Make Piping Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 1 - Refrigerant Connections and Recommended Liquid and Va-
por Tube Diameters (in.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 2 - Accessory Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Install Liquid-Line Filter Drier Indoor . . . . . . . . . . . . . . . . . . . . . 6
Refrigerant Tubing connection Outdoor. . . . . . . . . . . . . . . . . . . . 6
No Installation of Adapter Tube . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sweat Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Evacuate Refrigerant Tubing and Indoor Coil . . . . . . . . . . . . . . . 6
Deep Vacuum Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Final Tubing Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 8 - Make Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . 7
Route Ground and Power Wires . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connect Ground and Power Wires . . . . . . . . . . . . . . . . . . . . . . . . 7
Connect Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Final Wiring Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 9 - Compressor Stator Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
cating). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 10 - Install Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 11 - Start-Up & Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Follow these steps to properly start up the system: . . . . . . . . . . . 8
Step 12 - Heating Check Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Step 13 - Pumpdown & Evacuation . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 14 - System Functions and Major Components . . . . . . . . . . . . . 12
Primary Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Utility Interface With Infinity Control . . . . . . . . . . . . . . . . . . . . 12
Infinity Control, Green Communications (COMM) Light . . . . . 12
Amber Status Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Installation Instructions
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5x7 LED Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
VFD Communications Light . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Bluetooth® Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Variable Frequency Drive (VFD). . . . . . . . . . . . . . . . . . . . . . . . 14
Table 3 - VFD LED Indicator Functions . . . . . . . . . . . . . . . . . . . . 14
Input Filter Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Reactors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Variable Speed Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Time Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Heating Electronic Expansion Valve (EXV-H) . . . . . . . . . . . . . 15
Vapor Injection Electronic Expansion Valve (EXV-VI) . . . . . . 15
BLDC Inverter-Controlled Fan Motor . . . . . . . . . . . . . . . . . . . . 15
Pressure Equalization Valve (PEV) . . . . . . . . . . . . . . . . . . . . . . 15
High Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Outdoor Pressure Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Stator Heater Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Infinity Controlled low ambient cooling . . . . . . . . . . . . . . . . . . 15
Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Systems Communication Failure . . . . . . . . . . . . . . . . . . . . . . . . 16
Model Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 4 - Model Plug Information . . . . . . . . . . . . . . . . . . . . . . . . . 16
Pressure Switch Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Line Voltage Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Forced Defrost Pins (J9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Temperature Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 5 - Resistance Values versus Temperature . . . . . . . . . . . . . 16
Table 6 - ODT Resistance Values versus Temperatures . . . . . . . . 16
Outdoor Air Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Outdoor Coil Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Suction Thermistor (OST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Discharge Thermistor (ODT) . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Failed Thermistor Default Operation . . . . . . . . . . . . . . . . . . . . . 17
Variable Speed Compressor Winding Resistance . . . . . . . . . . . 17
Table 7 - Variable Speed Compressor Resistances
(winding resistance at 68°F? (20°F) . . . . . . . . . . . . . . . . . . . . . . . . 17
Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Status Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Status Code Recall Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 8 - Fault Code Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 9 - Malfunction Lockout Durations . . . . . . . . . . . . . . . . . . . 21
FINAL CHECKS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
CARE AND MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
PAGE NO.
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Related Manuals for Carrier Infinity 25VNA4
Summary of Contents for Carrier Infinity 25VNA4
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Page 1: Table Of Contents
25VNA4 Infinity™ Variable Speed Heat Pump with Greenspeed™ Intelligence 2 to 5 Nominal Tons Installation Instructions NOTE: Read the entire instruction manual before starting the installation. This marker indicates a change from prior revision. Table of contents PAGE NO. PAGE NO. SAFETY CONSIDERATIONS . -
Page 2: Safety Considerations
25VNA4: Installation Instructions SAFETY CONSIDERATIONS WARNING Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which ELECTRICAL HAZARD - HIGH VOLTAGE! may cause death, personal injury, or property damage. Consult a Failure to follow this warning could result in personal injury or death. qualified installer, service agency, or your distributor or branch for Electrical components may hold charge. -
Page 3: Installation
25VNA4: Installation Instructions Heat Pumps Using Puron Refrigerant to obtain required unit changes for CAUTION specific applications and for R-22 retrofit. Step 1 – Check Equipment and Job Site EQUIPMENT DAMAGE HAZARD Unpack Unit Failure to follow this caution may result in equipment damage. Move to final location. -
Page 4: Step 3 - Clearance Requirements
25VNA4: Installation Instructions For hurricane tie downs, contact distributor for details and PE Make the necessary electrical connections as shown in Fig. 4 Fig. 5 (Professional Engineer) Certification, if required. and by following the Installation Instructions included with accessory kit. On rooftop applications, mount on level platform or frame. - Page 5 25VNA4: Installation Instructions CAUTION CAUTION UNIT DAMAGE HAZARD UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or Failure to follow this caution may result in equipment damage or improper operation. improper operation. Do not leave system open to atmosphere any longer than minimum If ANY refrigerant tubing is buried, provide a 6 in.
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Page 6: Outdoor Unit Connected To Factory-Approved Indoor Unit
25VNA4: Installation Instructions Outdoor Unit Connected to Factory-Approved Indoor Refrigerant Tubing connection Outdoor Unit Connect vapor tube to fitting on outdoor unit vapor service valves (see Table Outdoor unit contains correct system refrigerant charge for operation with factory-approved, AHRI-rated smallest indoor unit when No Installation of Adapter Tube connected by 15 ft. -
Page 7: Final Tubing Check
External to the unit, the same accessories such as the liquid line solenoid, support feet, snow rack, wind baffle etc., are available on other Carrier units can also be used on FIELD GROUND this line of product. Refer to the individual Installation Instructions... -
Page 8: Step 11 - Start-Up & Charging
25VNA4: Installation Instructions Step 11 – Start-Up & Charging Follow these steps to properly start up the system: 1. After system is evacuated, close the disconnects to energize indoor CAUTION unit, outdoor unit, and User Interface (UI). Do not attempt to operate the system in heating or cooling mode at this time. - Page 9 25VNA4: Installation Instructions 5. If the outdoor ambient temperature is between 65°F and 105°F and the indoor temperature is between 65°F and 80°F then select "subcool" (See Fig. 13). 6. The next screen will show the target subcooling that should be attained while charging (see Fig.
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Page 10: Step 12 - Heating Check Charge
25VNA4: Installation Instructions A20035 A20039 Fig. 17 – Select Line Set Length & Vapor Line Diameter Fig. 21 – Total Charge Required for a Complete Charge Step 12 – Heating Check Charge In heating mode, the required charging method is by weigh-in. On new installation or complete recharge, refer to the refrigerant charging screen in the user interface (UI) to obtain the required charge adjustment and/or total charge required (see... -
Page 11: Step 13 - Pumpdown & Evacuation
25VNA4: Installation Instructions Step 13 – Pumpdown & Evacuation Evacuation and Recovery of Refrigerant from within 25VNA Because this system has an inverter controlled compressor and EXV the conventional procedure cannot be used to "pump down" and isolate the Because this system has an EXV for the heating expansion device, refrigerant into the outdoor unit. -
Page 12: Step 14 - System Functions And Major Components
25VNA4: Installation Instructions Step 14 – System Functions and Major Components Utility Interface With Infinity Control The utility curtailment relay should be wired between the two UTIL The 25VNA models utilize an Infinity Communicating User Interface connections on the control board for this Infinity Communicating (UI). - Page 13 25VNA4: Installation Instructions Fig. 26 – Variable Speed Control Board with optional Utility Relay A200049 Status LED (Yellow) CCN Communication LED (Green) VFD LED (Red / Green) VFD-PCM Communication Port A200044 Fig. 27 – Primary Control Board Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Page 14: Amber Status Light
DC voltage greater than 40V is present. 1. Download the app Blinks when the VFD receives a message – Search the App Store™ or Google Play™ for Carrier Service Green from PCM. Technician to download. The app is available on phone and tablet On when VFD is in normal status. -
Page 15: Input Filter Board
25VNA4: Installation Instructions Pressure Equalization Valve (PEV) WARNING The PEV is located at the discharge of the compressor and the inlet to the accumulator. The purpose of the PEV is to prevent the compressor from ELECTRICAL HAZARD - HIGH VOLTAGE starting with a high pressure differential, which can cause compressor Failure to follow this warning could result in personal injury or death. -
Page 16: Troubleshooting
25VNA4: Installation Instructions Troubleshooting Forced Defrost Pins (J9) The forced defrost pins have several functions. When shorting the pins Systems Communication Failure using a clip wire the below functions can be executed: If communication with the Infinity control is lost with the User Interface "If the pins are shorted for more than 5 seconds and the unit is in heating (UI), the control will flash the appropriate fault code (see Table... -
Page 17: Outdoor Coil Thermistor
25VNA4: Installation Instructions Outdoor Coil Thermistor CAUTION The outdoor coil thermistor is a 10Kohm resistor used for multiple system operations. It provides the coil/liquid line temperature to the EQUIPMENT DAMAGE HAZARD primary control module and user interface. It is used for low ambient operation, defrost initiation, defrost termination and assistance with OAT Failure to follow this caution may result in equipment damage and/or improper operation. -
Page 18: Status Codes
25VNA4: Installation Instructions Status Codes Emergency Mode Connections with a Conventional Thermostat Table 8 shows the status codes flashed by the amber status light. Most system problems can be diagnosed by reading the status code as flashed The conventional thermostat inputs is designed to work for emergency by the amber status light on the control board. - Page 19 25VNA4: Installation Instructions Table 8 – Fault Code Table Code* Description Expansion Base Fault** Malfunction*** Systen Control Upgrade Recomended Line Voltage Low Line Voltage High PCM-Bluetooth Module Communication Failure Indoor Coil Freeze Protection 5V PCM External Power Out of Range Invalid Model Plug Model Plug Missing Model Plug Changed...
- Page 20 25VNA4: Installation Instructions Table 8 – Fault Code Table (Continued) Code* Description Expansion Base Fault** Malfunction*** EXV-H Phase Open EXV-H Power Short to Ground EXV-H Phase Short to Ground EXV-VI Phase Open EXV-VI Power Short to Ground EXV-VI Phase Short to Ground VFD Control Relay Coil Open VFD Control Relay Coil Shorted PFC Error...
- Page 21 25VNA4: Installation Instructions Table 9 – Malfunction Lockout Durations (Continued) Table 9 – Malfunction Lockout Durations Code Title Time Code Title Time 64-41 EXV-H Phase Open Duration of Event 24-58 5V PCM External Power Out of Range Duration of Event 64-44 EXV-H Power Short to Ground Duration of Event 25-61 Invalid Model Plug Malfunction...
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Page 22: Final Checks
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