Carrier Infinity 25HNB9 User Manual

25HNB6(2to5Tons)
25HNB9(2to5Tons)
Infinityr 2 --- S t a g e H e a t P u m p
with Puronr Refrigerant
Installation Instructions
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory--authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes and
current editions of the National Electrical Code ( NEC ) NFPA 70.
In Canada, refer to current editions of the Canadian electrical code
CSA 22.1.
Recognize safety information. This is the safety--alert symbol
!
!
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury. Understand
these signal words; DANGER, WARNING, and CAUTION. These
words are used with the safety--alert symbol. DANGER identifies
the most serious hazards which will result in severe personal injury
or death. WARNING signifies hazards which could result in
personal injury or death. CAUTION is used to identify unsafe
practices which would result in minor personal injury or product
and property damage. NOTE is used to highlight suggestions
which will result in enhanced installation, reliability, or operation.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position and
install a lockout tag. There may be more than 1 disconnect
switch. Lock out and tag switch with a suitable warning label.
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing and gloves when
handling parts.
CAUTION
!
Indoor Thermostat Control Options
Model
Infinity
Control
Standard
2 --- s t a g e
Thermostat
25HNB6 / 25HNB9 Yes Yes
INSTALLATION RECOMMENDATIONS
NOTE: In some cases noise in the living area has been traced to
gas pulsations from improper installation of equipment.
1. Locate unit away from windows, patios, decks, etc. where
unit operation sound may disturb customer.
2. Ensure that vapor and liquid tube diameters are appropriate
for unit capacity.
3. Run refrigerant tubes as directly as possible by avoiding un-
necessary turns and bends.
4. Leave some slack between structure and unit to absorb vi-
bration.
5. When passing refrigerant tubes through the wall, seal open-
ing with RTV or other pliable silicon--based caulk. (See Fig.
1.)
6. Avoid direct tubing contact with water pipes, duct work,
floor joists, wall studs, floors, and walls.
7. Do not suspend refrigerant tubing from joists and studs with
a rigid wire or strap which comes in direct contact with
tubing.(See Fig. 1.)
8. Ensure that tubing insulation is pliable and completely sur-
rounds vapor tube.
9. When necessary, use hanger straps which are 1 in. wide and
conform to shape of tubing insulation. (See Fig. 1.)
10. Isolate hanger straps from insulation by using metal sleeves
bent to conform to shape of insulation.
When outdoor unit is connected to factory--approved indoor unit,
outdoor unit contains system refrigerant charge for operation with
AHRI rated indoor unit when connected by 15 ft. (4.57 m) of
field--supplied or factory accessory tubing. For proper unit
operation, check refrigerant charge using charging information
located on control box cover and/or in the Check Charge section of
this instruction.
IMPORTANT: Maximum liquid--line size is 3/8--in. OD for all
residential applications including long line applications.
IMPORTANT: Always install the factory--supplied liquid--line
filter drier. Obtain replacement filter driers from your distributor or
branch.

Carrier Infinity 25HNB9 Specifications

General

Brand	Carrier
Model	Infinity 25HNB9
Category	Heat Pump
Language	English

Summary

Installation Instructions and Safety

Safety Considerations

Crucial safety precautions and warnings for installation personnel.

Installation Recommendations

Recommendations for proper installation to ensure performance and longevity.

Unit Placement and Environment

Mounting and Clearance Requirements

Guidelines for unit placement, mounting, and necessary clearances for airflow and service.

Operating Ambient Conditions

Specifies the acceptable outdoor temperature ranges for cooling and heating modes.

Piping and System Connections

Elevating the Unit

Guidance on elevating the unit for local climate and code requirements.

Liquid-Line Solenoid Valve Installation

Instructions for installing the liquid-line solenoid valve in long-line applications.

Refrigerant Piping Connections

Procedures for making refrigerant piping connections.

Unit Damage Hazards

Warnings related to POE oil and buried tubing practices.

Refrigerant System Components

Liquid-Line Filter Drier Installation

Instructions for installing the required liquid-line filter drier.

Outdoor Refrigerant Tubing Connection

Steps for connecting refrigerant tubing to the outdoor unit service valves.

Electrical and Control Wiring

Electrical Connections

Detailed instructions for making power and control wiring connections.

Airflow Setup Configuration

Configuring airflow settings for different indoor units and controls.

System Start-Up and Operation

System Start-Up Procedures

Steps to follow for safely starting up the HVAC system after installation.

System Functions and Sequence

Explanation of how the system operates in different modes and stages.

Operational Details and Control

Outdoor Fan Motor Operation

Explains how the outdoor fan motor operates based on ambient conditions and model.

Time Delays and Cycling

Details various time delays and cycling features programmed into the system.

Compressor Modulation

Describes the two-stage operation and modulation of the compressor.

Advanced Operational Modes

Infinity Low Ambient Cooling

How the Infinity Control manages low ambient cooling operation.

Defrost Cycle Control

Explanation of the defrost cycle initiation, termination, and control.

System Adjustments and Checks

Forced Defrost Initiation

Procedures for initiating a forced defrost cycle.

Refrigerant Charge Check

Procedures for checking and adjusting refrigerant charge in cooling and heating modes.

System Components and Troubleshooting

Major Components Overview

Lists and briefly describes the main components of the system.

Troubleshooting Fault Codes

Identifies fault codes and their possible causes and actions for troubleshooting.

Advanced Diagnostics and Testing

Unloader Test Procedure

Procedure to test the compressor unloader mechanism's operation.

Temperature Thermistors

Information on thermistor function, resistance values, and sensor comparison.

Fault Handling and Status Codes

Failed Thermistor Default Operation

Default system operation when outdoor or coil thermistors fail.

Status Codes Interpretation

How to interpret amber LED status codes for system diagnostics.

Wiring Diagrams and Final Checks

Thermidistat Wiring Diagrams

Wiring diagrams for various thermostat and indoor unit configurations.

Final Installation Checks

Essential checks to perform before leaving the job site.

Puron Refrigerant Quick Reference

Key information and precautions for servicing Puron (R-410A) refrigerant systems.