Carrier Performance 25TPB7 User Manual

Installation Instructions
NOTE: Read the entire instruction manual before starting the installation.
SAFETY CONSIDERATIONS
IMPORTANT: This appliance shall only be installed by EPA qualified
personnel having appropriate certification. This appliance is not
intended for use by persons (including children) with reduced physical,
sensory or mental capabilities or lack of experience and knowledge,
unless they have been given supervision or instruction concerning use of
the appliance by a person responsible for their safety
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 a dry
powder or C02 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.
Proper tools should be used that are designed for the refrigerant of the
unit being installed. For A2L refrigerants, non-sparking tools are
required. A refrigerant detector should be used prior to and during the
installation process to check for leaks. Open flames or other ignition
sources should not be present except during brazing. Brazing should
only take place on refrigerant tubes that are open to the atmosphere or
have been properly evacuated
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.
Installation Recommendations
NOTE: In some cases noise in the living area has been traced to gas
pulsations from improper installation of equipment.
1. Maximum allowed elevation is 10,000 feet (3000 meters) above sea
level or lower.
2. Locate unit away from windows, patios, decks, etc. where unit
operation sound may disturb customer.
3. Ensure that vapor and liquid tube diameters are appropriate for unit
capacity.
4. Run refrigerant tubes with no bends with centerline bend radius less
than 2.5 times the external pipe diameter.
5. Leave some slack between structure and unit to absorb vibration.
6. When passing refrigerant tubes through the wall, seal opening with
RTV or other pliable silicon-based caulk. (See Fig. 1.)
7. Avoid direct tubing contact with water pipes, duct work, floor
joists, wall studs, floors, and walls.
8. 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.)
9. Ensure that tubing insulation is pliable and completely surrounds
vapor tube.
10. When necessary, use hanger straps which are 1 in. (25 mm) wide
and conform to shape of tubing insulation. (See Fig. 1.)
11. Isolate hanger straps from insulation by using metal sleeves bent to
conform to shape of insulation.
12. Provision shall be made for expansion and contraction of long runs
of piping.
13. Piping and fittings shall be protected as far as possible against
adverse environmental effects. For example, the accumulation of
dirt and debris.
14. Piping should be installed to reduce the likelihood of hydraulic
shock damaging the system.
15. Certified piping and components must be used in order to protect
against corrosion.
16. Flexible pipe elements shall be protected against mechanical
damage, excessive stress by torsion, or other forces. They should be
checked for mechanical damage annually.
25TPB7
Performance™ Series 2-Stage Heat Pump
with Puron® Refrigerant and
InteliSense™ Technology
2 To 5 Tons
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. There may be more than
1 disconnect switch. Lock out and tag switch with a suitable warning
label.
WARNING
!
EXPLOSION HAZARD
Failure to follow this warning could result in
death, serious personal injury, death, and/or
property damage.
Never use air or any gas containing oxygen for
leak testing or operating refrigerant
compressors. Never allow compressor suction
pressure to operate in a vacuum with service
valves closed. See Service Manual for
pump-down instructions.

Carrier Performance 25TPB7 Specifications

General

Model	25TPB7
Type	Heat Pump
HSPF Rating	Up to 9.5
Refrigerant	R-410A
Cooling EER	Up to 12.5
ENERGY STAR® Certified	Yes
Voltage	208/230V
Phase	1
Compressor Type	Scroll
Noise Level	72 dB
Cooling Capacity (BTU/h)	18, 000 - 60, 000
Heating Capacity (BTU/h)	18, 000 - 60, 000
Sound Level (Outdoor Unit)	72 dB
Stages	Two-stage

Summary

Safety Considerations

Electrical Shock Hazard

Warning about electrical shock hazard during installation and servicing, requiring disconnect.

Explosion Hazard

Warning concerning explosion hazard from improper refrigerant handling or testing with oxygen.

Installation Recommendations

Mounting and Site Preparation

Install on a Solid, Level Mounting Pad

Guidance on mounting the unit securely on a level pad to prevent movement and ensure stability.

Clearance Requirements

Specifies required clearances around the unit for airflow, service, and protection from elements.

Check Equipment and Job Site

Instructions to verify unit specifications and ensure job site readiness before installation.

Unpack and Inspect Unit

Procedures for safely removing the unit from packaging and checking for shipping damage.

Piping and Connections

Check Defrost Thermostat

Verifying the correct location and secure attachment of the defrost thermostat on the stub tube.

Elevate Unit

Instructions to raise the unit to ensure clearance above snowfall and provide adequate drainage.

Install Liquid-Line Solenoid Valve (LSV)

Guidelines for installing an LSV kit in long-line applications for proper operation.

Make Piping Connections

Instructions for connecting refrigerant tubing, including safety precautions and proper procedures.

Brazing Procedures

Brazing Connections

Detailed instructions and safety warnings for brazing refrigerant lines and components.

System Evacuation and Electrical

Install Liquid Line Filter Drier Indoor

Procedure for installing the required filter drier in the liquid line, including brazing.

Evacuate Refrigerant Tubing and Indoor Coil

Methods and importance of deep vacuum evacuation to remove air and moisture from the system.

Make Electrical Connections

Instructions for safely connecting power and ground wires to the unit's control box.

InteliSense™ Technology

InteliSense™ Technology Overview

Explanation of InteliSense™ technology, its sensors, and connectivity with smart thermostats.

Airflow and Startup

Airflow Selections for Furnaces

Guidance on selecting proper airflows for ECM and variable speed furnaces during cooling.

Airflow Selection for FT4B Fan Coils

Instructions for selecting airflows for FT4B fan coils using the Easy Select control board.

System Startup Procedure

Step-by-step guide for safely starting up the system after installation and evacuation.

Operation and Control

Sequence of Operation

Details on how the unit operates in cooling and heating modes based on thermostat signals.

Defrost Control

Explanation of the defrost control, settings, and initiation/termination sequences.

Defrost Speedup

Procedure for forcing a defrost cycle and understanding its effects with Quiet Shift-2.

System Checks and Verification

Check System Charge

Procedure for checking and adjusting refrigerant charge using subcooling under favorable conditions.

Heating Check Chart Procedure

Guidance on using the heating check chart to verify correct system operation and pressure.

Verify Switching Between Stages

Checking suction pressures and compressor current for proper switching between low and high stages.

Unloader Test Procedure

Methods to verify the compressor unloader mechanism is functioning correctly.

Final Checks

Essential final checks before leaving the job site, including wiring, covers, and documentation.

Troubleshooting and Maintenance

Troubleshooting Compressor Windings

Using winding resistance table to diagnose potential compressor winding damage.

Major Components

Overview of key components like the 2-stage compressor and its protection mechanisms.

Care and Maintenance

Importance of periodic maintenance for continuing high performance and minimizing equipment failure.

Training Resources

Information on accessing professional HVAC training resources via My Learning Center.