To Next PageTo Next PageWhat causes low head and high vapor pressures in my Rheem RA17?
Low head pressure and high vapor pressures in your Rheem Heat Pump can occur if the = is in bypass mode. Verify the thermistor and pressure transducer connection and operation. A bad compressor can also cause this issue, requiring replacement.
General| Series | RA17 |
|---|---|
| Type | Heat Pump |
| SEER | 17 |
| HSPF | 9.5 |
| Cooling Capacity (BTU/h) | 18, 000 - 60, 000 |
| Heating Capacity (BTU/h) | 18, 000 - 60, 000 |
| Refrigerant | R-410A |
| Compressor Type | Scroll |
| Motor Type | PSC |
| Stages | Single |
Crucial safety warnings for installation and operation.
Important cautions regarding R-410A systems and component matching.
Procedure for verifying efficiency ratings as per AHRI standards.
Site survey and heat gain calculation for system selection.
Inspecting unit for shipping damage and verifying components.
Breakdown of the model number for identification.
Physical dimensions for various unit models.
Importance of correct sizing and installation for optimal performance.
List of critical system components that must be matched.
Guidelines for selecting an optimal outdoor unit location.
Precautions for units installed in corrosive areas.
Clearances and recommendations for confined installations.
Securing methods for wind and seismic resistance.
Unit placement advice for noise reduction.
Safety warning for securing elevated units to prevent tipping.
List of tools needed for R-410A systems.
Properties and application details of R-410A refrigerant.
Key information and precautions for R-410A.
Guidance for replacing R-22 units with R-410A systems.
Requirements for matching indoor coils with R-410A systems.
Procedures for installing refrigerant tubing between units.
Adjusting refrigerant charge based on line set length.
Accounting for pressure losses from tubing and fittings.
How to select the proper liquid line size for optimal performance.
Special considerations for applications with extended line sets.
Formulas for calculating oil level adjustments.
Sizing the suction line for proper oil return and system performance.
Managing refrigerant migration in long line set systems.
Requirements for long line sets with units on the same level.
Requirements for long line sets with outdoor unit below indoor unit.
Requirements for long line sets with outdoor unit above indoor unit.
General guidelines for installing refrigerant tubing.
Routing, supporting, and protecting tubing runs.
Brazing techniques and materials for refrigerant lines.
Brazing procedures and proper insulation of lines.
Procedure for pressurized leak testing the system.
Introduction to the EcoNet enabled 2-Stage Control System.
Overview of the EcoNet communication system board.
Connection points for power and thermostat.
Details on fuses, sensors, buttons, and memory card.
How the EcoNet system and ICC operate.
Function and operation of pressure safety controls.
ICC operation with non-communicating thermostats.
Details on commands, timers, and delays for compressor operation.
Displays for first and second stage cooling operations.
Overview of active protection modes for the compressor.
Lockouts due to low or high pressure conditions.
Indicates protector trips and open start circuits.
Continuation of compressor protection modes.
Procedures for exiting lockouts and entering test mode.
Procedures for accessing and managing system faults.
Clearing fault history from the system.
Step-by-step guide to clearing fault history.
Table listing diagnostic codes and their meanings.
Detailed diagnostic codes for system issues.
Further diagnostic codes and troubleshooting information.
Wiring instructions for conventional thermostats.
Visual guides for wiring non-communicating thermostats.
Explains ICC operation with conventional thermostats.
Details on commands, timers, and delays for compressor operation.
Displays for first and second stage cooling operations.
Overview of active protection modes and lockouts.
Continuation of ICC control operations and protection modes.
Details on HPC, locked rotor, and open start circuit lockouts.
Procedures for exiting lockouts and entering test mode.
Procedures for accessing and managing system faults.
How to enter and navigate fault recall mode.
Steps to clear stored fault data.
General guidelines for field electrical wiring.
Specifics on connecting power wiring.
Importance and procedure for unit grounding.
Requirements for low-voltage control wiring.
Detailed control wiring and wire size recommendations.
Visual guides for wiring non-communicating thermostats.
Further details on control wiring.
Connecting power wiring to the unit.
Reinforces the importance of proper grounding.
Initial procedures before compressor start.
Methods for verifying and balancing system airflow.
Procedures for system evacuation and leak detection.
Detailed steps for proper system evacuation.
Steps for confirming system seal after evacuation.
Procedures for checking and adjusting system charge.
Specific methods for R-410A systems.
Verifying airflow and coil cleanliness before charging.
Using weight and measurement devices for charging.
Continued procedure for checking refrigerant charge.
Using pressures for initial system charge adjustment.
Fine-tuning charge using subcooling measurements.
Final steps in charge checking.
Final installation tasks and system setup.
Purpose and installation of crankcase heaters.
Function and operation of pressure safety controls.
Function and use of the Low Ambient Control.
Information on optional hard start components.
Diagnostic guide for electrical issues.
Diagnostic guide for mechanical cooling problems.
Common issues, causes, and remedies for system problems.
Troubleshooting compressor overheating issues.
Troubleshooting electrical and flooded start issues.
Troubleshooting contamination and lubrication loss.
Troubleshooting electronic expansion valves.
Continued troubleshooting for electronic expansion valves.
Cooling mode specific troubleshooting guidance.
Specifies wiring diagrams for single-phase units.
Detailed electrical wiring diagram for the unit.
