Carrier 38SQ User Manual

Introduction to the 38SQ series heat pumps and a summary of their key features, including indoor and outdoor components.

Explains the structure and meaning of the model numbers for the heat pump system.

Defines the nominal cooling capacity in BTUs for different model number suffixes.

Lists the metering device (piston) sizes for various outdoor units.

Provides key dimensions (A, B, C, D) in inches and millimeters for different 38SQ outdoor unit models.

Details physical data for the outdoor coil section, including weight, charge, fan specs, and coil dimensions.

Lists approved combinations of indoor and outdoor sections with their corresponding tube sizes.

Provides physical data for the indoor compressor section, including operating weight and refrigerant control.

Lists ordering numbers and descriptions for various optional accessories for the heat pump system.

Details available thermostat and subbase packages for system control and functionality.

Covers Motormaster Low-Ambient Kit, Ball Bearing Fan Motor, and related accessories for low-temperature operation.

Details Evaporator Freeze Thermostat, Isolation Relay, Service Sentry, and Optimizer II for system protection and control.

Includes Outdoor Thermostats, TXV Kits, Support Feet, and Snow Rack for enhanced system performance and protection.

Provides detailed electrical data for the 38SQ models, including voltage, amps, and wire sizing.

Presents performance data for cooling and heating, including CFM, TC, Seas Eff, High-Temp TC/COP, and Low-Temp TC/COP.

Continues the performance data tables for cooling and heating across various operating conditions and models.

Provides detailed cooling capacity data (Total, Sensible) for various combinations at different air temperatures.

Lists multipliers to adjust cooling performance based on different indoor section combinations.

Presents further detailed cooling capacity data for additional model combinations and conditions.

Provides multipliers for determining cooling performance with other indoor sections for extended models.

Contains the last set of detailed cooling capacity figures for specific combinations and conditions.

Lists the final set of multipliers for adjusting cooling performance with different indoor sections.

Shows heating performance data (Capacity, Power) for various combinations at different outdoor temperatures.

Provides multipliers for determining heating performance with other indoor coils.

Continues to present heating performance data across a wider range of conditions and models.

Lists additional multipliers for adjusting heating performance with different indoor coils.

Covers outdoor installation, operating temperatures, level placement, and refrigerant tube length considerations.

Specifies electrical connection requirements and guidelines for refrigerant tube installation and mismatches.