Carrier Infinity 25VNA8 Installation Instructions Manual
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Carrier Infinity 25VNA8 Installation Instructions Manual

Infinity 18vs variable speed heat pump with puron refrigerant
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See also: Owner's Manual , Instruction and Installation Manual
25VNA8
Infinityr 18VS Variable Speed Heat Pump
with Puronr Refrigerant
NOTE: Read the entire instruction manual before starting the installation.
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Installation Instructions

TABLE OF CONTENTS

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  • Page 1: Table Of Contents

    25VNA8 Infinityr 18VS Variable Speed Heat Pump with Puronr Refrigerant Installation Instructions NOTE: Read the entire instruction manual before starting the installation. TABLE OF CONTENTS PAGE NO. SAFETY CONSIDERATIONS ..............

  • Page 2: Safety Considerations

    Information in these installation instructions pertains only to Indoor Thermostat Control Options 25VNA8 series units. Infinity Touch Standard Model Control HP Thermostat SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, 25VNA8 Yes* Yes** or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property * Requires model SYSTXCCUITN01 or SYSTXCCUITW01 with version 11 .

  • Page 3: Installation

    -bearing wall and isolate unit and tubing set from IMPORTANT: Liquid- -line size is 3/8- -in. OD for all 25VNA8 structure. Arrange supporting members to adequately support unit applications. The maximum allowable equivalent line set length is and minimize transmission of vibration to building.

  • Page 4: Step 3 - Clearance Requirements

    (24.38 - - 30.48 m), capacity and performance losses can occur. CAUTION Follow the pipe sizing recommendations in the 25VNA8 Product data to manage these losses. This unit shall not be installed with greater than 100 ft (30.48 m) of equivalent line length.
  • Page 5 Outdoor Unit Connected to Factory- - Approved Indoor Sweat Connections Unit CAUTION Outdoor unit contains correct system refrigerant charge for operation with factory- -approved, AHRI- -rated indoor units when connected by 15 ft. (4.57 m) of field- -supplied or factory- -accessory UNIT DAMAGE HAZARD tubing, and factory- -supplied filter drier.

  • Page 6: Step 8 - Make Electrical Connections

    Connect Control Wiring- - Non- - Communicating Do not supply power to unit with compressor terminal box Six wires are required when connecting 25VNA8 models to cover removed. non- -communicating 2- -stage thermostats. Use Fig. 8 For required connections.
  • Page 7 Thermidistat Fan Coil Heat Pump RVS Cooling O/B W2 J2 Jumper Heat Stage 3 W/W1 on Control Board Jumper Wire Heat/Cool Stage 1 Y1 / W2 Required for Single-Stage Heat/Cool Stage 2 Y/Y2 Y/Y2 24VAC Hot Heating 24VAC Hot Cooling J1 Jumper on Control Board Dry Contact 1...

  • Page 8: Step 9 - Compressor Internal Crankcase Heater

    Carrier units, can also be used on this line of To furnish power to heater only, set thermostat to OFF and close product. For models utilizing 23 inch x 23 inch base pans, it is electrical disconnect to outdoor unit.

  • Page 9: Step 12 - System Functions And Sequence Of Operation

    1. After system is evacuated, close the disconnects to energize the ID and OD units to access the user interface (UI), Keep The 25VNA8 models utilize either Infinity Touch Communicating system in off mode. Under the Advanced function menu, User Interface (UI) or conventional HP thermostat. When using UI...
  • Page 10 A14021 Fig. 12 - - AOC Control Board Crankcase Heater Operation Communication and Status Function Lights Infinity Touch Control, Green Communications This unit has an internal crankcase heater that will be energized during the off cycle and is intelligently demanded by the system to (COMM)Light prevent the compressor from being the coldest part of the system A green LED (COMM light) on the outdoor board (see Fig.

  • Page 11: Step 13 - Check Charge

    The control board accumulates compressor run time. As the If any adjustment is necessary, add or remove the charge slowly accumulated run time approaches the selected defrost interval time, (no greater than 0.5 lb per minute) and allow system to operate for 25 minutes to stabilize before declaring a properly charged system.
  • Page 12 Table 3 – Required Charge Adjustment for Indoor Coil Model Furnace or Fan Coil Model 25VNA824A003 25VNA825A003 25VNA836A003 25VNA848A003 Number CNPV*36** CAP**36** CSPH*36** FE4A or FV4(A,B,C)NF002 FE4A or FV4(A,B,C)N(B,F)003 CNPV*42** CAP**42** CNPV*48** +0.75 +0.75 +0.75 CAP**48** +0.75 +0.75 +0.75 CSPH*48** +0.75 +0.75 +0.75...
  • Page 13 Heating Check Chart Procedure (See Fig.16 - - 18) running in stage 5 with appropriate outdoor fan speed and indoor airflow. Upon completion of a countdown period for system (Communicating / Non- - communicating Systems) stabilization, check refrigerant pressures for the appropriate In heating mode, the required charging method is by weigh- -in.

  • Page 14: Step 14 - Pumpdown & Evacuation

    The UI (User Interface) has provisions to assist in performing the EXV for refrigerant recovery and/or evacuation. this function. 1. Connect gauges to 25VNA8 liquid and vapor service valve 1. Connect gauges to 25VNA8 liquid and vapor service valve ports to monitor operating pressures during and at comple- ports to monitor operating pressures during and at comple- tion of the procedure.

  • Page 15: Major Components

    MAJOR COMPONENTS Variable Speed Compressor This unit contains a variable speed rotary compressor that has a Variable speed Control Board wide operating range. It operates on a variable 3 phase sine wave provided by the inverter. This compressor can only be operated by the specific inverter supplied with the unit.

  • Page 16: Troubleshooting

    TROUBLESHOOTING connect the C and D wires from the service tool to the two terminals of the 120VAC to 24VAC adapter (0.5Amp minimum) as Systems Communication Failure shown in Fig. 20. If communication is lost with the User Interface (UI), the control When the service tool is connected and powered up, the will flash the appropriate fault code (see Table 7).
  • Page 17 Refer to Table 5 and Fig. 21 and 22 for resistance values versus The thermistor comparisons are not performed during low ambient temperature. cooling or defrost operation. Failed Thermistor Default Operation Table 5 – 10K/50Kohm Resistance Values vs Temperature Factory defaults have been provided in the event of failure of 10Kohm _C (_F) outdoor air thermistor (OAT) and/or outdoor coil thermistor...
  • Page 18 (see Fig. 25). Table 6 – Variable Speed Compressor Resistance CAUTION (winding resistance at 70_F 20_F) MODEL 25VNA8 WINDING UNIT DAMAGE HAZARD Between terminals 0.59 0.59 0.59...
  • Page 19 Status Codes EXAMPLE: 3 short flashes followed by 2 long flashes indicates a 32 code. Table 7 shows the status codes flashed by the amber status light. Table 7 shows this to be low pressure switch open. Most system problems can be diagnosed by reading the status code as flashed by the amber status light on the control board.
  • Page 20 Table 7 – Troubleshooting SERVICE FLASH RESET TIME AMBER LED DESCRIPTION CODE (Minimum) Minutes (Amber LED) Standby ON, no flash Variable Capacity 1, pause Mode Variable 1 (2 sec ON), Speed longer pause Range (1 second OFF) Cutback Communications Loss Invalid Model High Pressure Switch Open Low Pressure Trip...

  • Page 21: Final Checks

    FINAL CHECKS CARE AND MAINTENANCE IMPORTANT: Before leaving job, be sure to do the For continuing high performance and to minimize possible equipment failure, periodic maintenance must be following: performed on this equipment. 1. Ensure that all wiring is routed away from tubing Frequency of maintenance may vary depending upon and sheet metal edges to prevent rub- -through or geographic areas, such as coastal applications.
  • Page 22 Catalog No: 25VNA8---1SI Copyright 2014 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Edition Date: 04/14 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: New...

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