Carrier 25TPA7 Performance Series Heat Pump Installation Guide

Key Safety and Installation Guidelines

Proper installation is crucial for safe and efficient operation. Always follow safety precautions, including wearing protective gear and adhering to electrical codes.

Safety First

• Be aware of potential hazards such as electrical shock, explosion, and cut hazards from sheet metal.
• Always disconnect power before servicing.
• Never use air or oxygen for leak testing or operating compressors.

Installation Recommendations

• Locate the unit away from windows and living areas to minimize noise.
• Ensure correct refrigerant tube diameters and run tubes directly, avoiding unnecessary bends.
• Properly seal wall penetrations and use vibration-absorbing methods for tubing.
• Ensure tubing insulation is pliable and completely surrounds vapor tubes.
• Units must be installed level, within ±2° tolerance.

Installation Procedures

The installation process involves several critical steps:

• Mounting: Install the unit on a solid, level pad, using tie-down bolts if required by local codes or for hurricane resistance. Ensure adequate clearance for airflow and service.
• Piping: Connect refrigerant lines, ensuring proper brazing techniques and using heat-sinking materials to protect service valves. Install the liquid-line filter drier.
• Electrical: Route and connect ground and power wires according to electrical codes. Connect control wiring as per thermostat instructions.
• Evacuation: Evacuate refrigerant tubing and indoor coil to 500 microns using a deep vacuum method.
• Charging: Check and adjust refrigerant charge based on unit rating plate information and line set length for optimal performance.

Operation and Maintenance

The document details the sequence of operation for cooling and heating, including two-stage performance. It also covers defrost control mechanisms and provides a basic troubleshooting guide, including compressor winding resistance checks.

Regular maintenance is recommended for optimal performance and to minimize equipment failure. Refer to the Owner's Manual for detailed maintenance requirements.