Amana RHF36A2A - User Manual

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&Air Conditioning

Heating

Built Better Than It Has To Be

Standard Features

• Bi-Flow Liquid Line Filter-Drier (Shipped Loose)

• Front Seating Service Valves

• Scroll Compressor

• Compressor Sound Blanket

• 5-Minute Anti-Short Cycle Protection

• Automatic Reset High Pressure Switch

• Automatic Reset Loss Of Charge Switch

• Time/Temperature Defrost

• Heating Mode Thermostatic Expansion Valve (TXV)

with Internal Check Valve

• Eight-Pole Condenser Fan Motor

• Charge Compensator

Accessories

• Fossil Fuel Kit

• Ambient Temperature Kit

• Hard Start Kit

• Freeze Protection Kit

NOTE: For optimum efficiency, units are rated only with

TXV on indoor coil.

Heat Pump Performance Data

For ARI Performance Data: See the ARI Directory, Product Data Booklet (PDB), or the product Service Manual.

March 2001 20283812

Above information is for nominal CFM and 70° F indoor dry bulb.

All pressures are PSIG.

All temperatures are °F.

RHF36A2A

14/15 SEER Remote Heat Pump

Specification Sheet

Due to policy of continual product improvement, the right is reserved to

change specifications and design without notice.

NOTE: It is important to electrically connect the unit and

properly size fuses/circuit breakers and wires in accordance

with all national and/or local electrical codes. Use copper wire

only.

65 60 55 50 47 45 40 35 30 25 20 17 15 10 5 0 -5 -10

∆T

34 33 31 29 27 27 25 23 22 20 19 18 17 15 13 12 10 8

Amps 14.7 13.6 12.7 11.9 11.5 11.3 10.6 10.1 9.6 9.2 8.8 8.6 8.4 8.0 7.5 7.0 6.5 5.8

HI PR 261 250 241 230 225 221 212 203 195 186 179 174 171 165 158 152 147 141

LO PR 81 75 70 65 61 59 54 48 43 39 34 32 31 26 22 19 16 13

RHF36A2A / CHA42TCC / BBA48A2A

Outdoor Ambient Temperature (°F)

Cooling Capacity, BTUH (Nominal) 36,000

Compressor

R.L. Amps 16.4

L.R. Amps 83.0

Condenser Fan Motor

Horsepower 1/6

R.L. Amps 1.1

L.R. Amps 1.9

Liquid Line, Inches O.D. 3/8

Suction Line, Inches O.D. 7/8

Refrigerant Charge (oz.) 243

5.0

Power Supply (volts) 208/230-60-1

Min Circuit Ampacity 25.0

Max Overcurrent Device (amps) 45

Power Supply (in.) 1/2 or 3/4

Low Voltage (in.) 1/2

293

Specifications

Design Subcooling Cooling Mode (°F)

Electric Conduit Size

Approximate Shipping Weight (lbs)

Amana

1810 Wilson Parkway • Fayetteville, TN 37334

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Summary

This document describes the RHF36A2A 14/15 SEER Remote Heat Pump, a heating and air conditioning unit designed for residential or commercial use. The device is built with a focus on durability and efficient performance, aiming to provide a comfortable indoor environment.

Function Description:

The RHF36A2A is a remote heat pump system, meaning it consists of an outdoor unit that works in conjunction with an indoor coil (not specified in this document but implied by the TXV note). Its primary function is to provide both heating and cooling to a space. During warmer months, it operates as an air conditioner, extracting heat from the indoor air and releasing it outside. In colder months, it reverses this process, absorbing heat from the outdoor air and transferring it indoors to warm the space. The "SEER" rating (Seasonal Energy Efficiency Ratio) of 14/15 indicates its energy efficiency during the cooling season, with higher numbers generally signifying better efficiency. The "Remote" designation implies that the outdoor unit is separate from the indoor air handling components, connected by refrigerant lines.

Usage Features:

The RHF36A2A heat pump incorporates several features designed to enhance its operation, reliability, and ease of use.

Bi-Flow Liquid Line Filter-Drier: This component, shipped loose for installation, is crucial for maintaining the cleanliness and efficiency of the refrigerant system. It filters out moisture and contaminants from the refrigerant, protecting the compressor and other components from damage. Its bi-flow design allows it to function effectively in both heating and cooling modes.
Front Seating Service Valves: These valves are strategically placed for easy access during installation and maintenance. They allow technicians to isolate parts of the refrigerant system, facilitating charging, evacuation, and repairs without needing to recover the entire refrigerant charge.
Scroll Compressor: The unit utilizes a scroll compressor, known for its efficiency, quiet operation, and durability compared to traditional reciprocating compressors. Scroll compressors have fewer moving parts, leading to less wear and tear and a longer lifespan.
Compressor Sound Blanket: To minimize operational noise, the compressor is equipped with a sound blanket. This feature contributes to a quieter outdoor environment, which is particularly beneficial in residential settings.
5-Minute Anti-Short Cycle Protection: This safety feature prevents the compressor from rapidly cycling on and off, which can cause premature wear and damage. After the compressor shuts down, it enforces a minimum 5-minute delay before it can restart, protecting the compressor and extending its operational life.
Automatic Reset High Pressure Switch: This switch monitors the refrigerant pressure within the system. If the pressure becomes excessively high, indicating a potential issue like a clogged coil or fan malfunction, the switch automatically shuts down the unit to prevent damage. Once the pressure returns to a safe level, the switch resets, allowing the unit to resume operation.
Automatic Reset Loss Of Charge Switch: Similar to the high-pressure switch, this component detects if the refrigerant charge falls below a safe level. A low charge can lead to compressor damage and inefficient operation. If a loss of charge is detected, the unit shuts down automatically. Like the high-pressure switch, it resets automatically once the charge is restored, allowing for continued operation.
Time/Temperature Defrost: This feature is essential for heat pump operation in cold climates. When the outdoor coil gets too cold, frost can build up, reducing efficiency. The time/temperature defrost system monitors both time and outdoor temperature to determine when defrosting is necessary. During defrost, the unit temporarily reverses its cycle to melt the ice off the outdoor coil, ensuring continuous efficient heating.
Heating Mode Thermostatic Expansion Valve (TXV) with Internal Check Valve: The TXV is a critical component that regulates the flow of refrigerant into the indoor coil. In heating mode, this specific TXV ensures optimal refrigerant flow for efficient heat transfer. The internal check valve allows refrigerant to bypass the TXV during cooling mode, ensuring proper operation in both directions. The note about optimum efficiency with TXV on the indoor coil emphasizes the importance of this component for overall system performance.
Eight-Pole Condenser Fan Motor: The condenser fan motor is responsible for moving air across the outdoor coil. An eight-pole motor typically operates at a lower speed than motors with fewer poles, contributing to quieter operation and potentially better efficiency.
Charge Compensator: This feature helps maintain optimal refrigerant charge levels across a range of operating conditions, contributing to consistent performance and efficiency.

Maintenance Features:

While the document primarily focuses on operational features, some aspects indirectly relate to maintenance or ease of service.

Front Seating Service Valves: As mentioned, these valves simplify maintenance procedures by allowing technicians to isolate parts of the refrigerant system, making it easier to perform tasks like checking refrigerant levels, adding refrigerant, or replacing components without a full system evacuation.
Bi-Flow Liquid Line Filter-Drier: This component, while primarily for operation, is also a maintenance item. It eventually becomes saturated with contaminants and needs to be replaced during major service or repairs to ensure continued system cleanliness and efficiency.
Electrical Connections and Wiring: The note emphasizes the importance of proper electrical connection and sizing of fuses/circuit breakers and wires according to national and local electrical codes. It also specifies the use of copper wire only. Adhering to these guidelines is crucial for safe and reliable operation and simplifies troubleshooting during maintenance.
Accessories for Enhanced Functionality: The availability of accessories like the Fossil Fuel Kit, Ambient Temperature Kit, Hard Start Kit, and Freeze Protection Kit suggests that the unit can be adapted for specific environmental conditions or operational needs. These kits can enhance performance, protect the unit, or integrate it with other systems, potentially reducing the need for reactive maintenance. For instance, a Freeze Protection Kit would prevent damage in extremely cold conditions.
Performance Data Tables: The inclusion of detailed performance data tables (e.g., Outdoor Ambient Temperature vs. AT, Amps, HI PR, LO PR) is invaluable for technicians. This data allows them to diagnose issues by comparing actual operating parameters with expected values, aiding in efficient troubleshooting and maintenance. For example, abnormal high or low pressures or current draws can indicate specific problems.

In summary, the RHF36A2A heat pump is designed as a robust and efficient system with numerous features aimed at ensuring reliable heating and cooling, quiet operation, and protection against common operational issues. Its design also considers ease of service through accessible components and the provision of detailed performance data.