Allied 4SHP17LE - User Manual

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508343-01 Issue 2247 Page 1 of 43

SERVICE MANUAL

4SHP17LE/4HP17L

(P) 508343-01

*P508343-01*

Table of Contents

Technical Specications - 4SHP17LE .........................2

Technical Specications - 4HP17L ..............................5

General ......................................................................10

Installation .................................................................10

Refrigeration Piping ...................................................12

Electrical – Circuit Sizing and Wire Routing ..............20

Start-Up Procedure....................................................21

Operation ...................................................................22

Control Board Diagnostics and Test Mode ................24

Maintenance ..............................................................27

Homeowner Information ............................................29

Charge Labels ...........................................................35

Start-Up and Performance Checklist .........................43

This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to

the potential for personal injury or death.

Electric shock hazard.

Can cause injury or death. Before attempting

to perform any service or maintenance,

turn the electrical power to unit OFF at

disconnect switch(es). Unit may have

multiple power supplies.

WARNING

As with any mechanical equipment, contact with sharp

sheet metal edges can result in personal injury. Take

care while handling this equipment and wear gloves

and protective clothing.

CAUTION

Improper installation, adjustment, alteration, service

or maintenance can cause property damage, personal

injury or loss of life. Installation and service must be

performed by a licensed professional HVAC installer (or

equivalent), service agency or the gas supplier.

WARNING

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This document provides service and installation instructions for the Allied Air Enterprises 4SHP17LE and 4HP17L split heat pump outdoor units.

Function Description

These units are split heat pumps designed for residential and light commercial heating and cooling applications. They operate using R-410A refrigerant and are intended for use with matching indoor coils and line sets. The system includes a demand defrost system that measures differential temperatures to detect frost buildup on the outdoor coil, initiating defrost cycles as needed. The control board features a 5-strike lockout mechanism for pressure switch trips, enhancing system protection.

Important Technical Specifications

The manual provides detailed physical and electrical data for various models within the 4SHP17LE and 4HP17L series, covering tonnages from 18 to 60.

Refrigerant: R410A
Electrical: 1-phase, 208/240V, 60Hz.
SEER Rating: 17
Compressor: Rated load amps vary by model (e.g., 10.3A for 4SHP17LE118P-51, 25.0A for 4SHP17LE148P-51). Locked rotor amps also vary (e.g., 45.7A for 4SHP17LE118P-51, 120.0A for 4SHP17LE148P-51).
Outdoor Fan Motor: Full load amps vary by model (e.g., 0.7A for 4SHP17LE118P-51, 2.6A for 4SHP17LE148P-51). Rated HP ranges from 1/8 to 1/3. Nominal RPM is 825 for most models.
Dimensions: Unit widths range from 29.38 to 35.75 inches, depths from 31.25 to 37.75 inches, and heights from 33.25 to 43.75 inches. Shipping weights range from 203 to 298 lbs.
Sound Ratings: Sound power levels range from 71 to 76 dBA for 4SHP17LE models and 74 to 79 dBA for 4HP17L models. Estimated sound pressure at 3.3 feet (1 meter) ranges from 63 to 68 dBA for 4SHP17LE and 66 to 71 dBA for 4HP17L.
Refrigerant Line Sizes: Liquid line connections are typically 3/8" for all models. Suction line connections vary from 3/4" to 1-1/8" depending on the model.
Operating Ambient Temperatures: Minimum outdoor operating ambient in cooling mode is 55°F (12.8°C), maximum is 125°F (51.7°C). Maximum outdoor operating ambient in heating mode is 66°F (18.9°C).
Pressure Switch Settings: High Pressure (auto reset) trips at 590 psig (4068 kPa) and resets at 418 psig (2882 kPa). Low Pressure (auto reset) trips at 25 psig (172 kPa) and resets at 40 psig (276 kPa).

Usage Features

Installation: Units must be installed on a solid, level mounting pad, with specific clearances for proper airflow and serviceability (e.g., 30" for service box, 48" for top of unit, 24" between units, 6" against wall). Rooftop installations require a minimum of 6" elevation to avoid ice buildup.
Refrigeration Piping: Requires refrigerant-grade copper tubes. Line sets should be run as directly as possible, avoiding unnecessary turns and bends. Insulation is required for vapor tubes and liquid line runs over 30 feet in an attic. A filter drier approved for R-410A is installed in the unit.
Flushing Line Sets: If installed in an existing system with R-22, a flushing procedure is required. Re-using existing line sets or indoor coils with contaminants (e.g., compressor burnout) is not recommended.
Indoor Expansion Valve: The outdoor unit is designed for systems that include an expansion valve metering device at the indoor coil. Installation instructions for the sensing bulb and equalizer line are provided.
Brazing Procedures: Detailed steps for cutting and deburring lines, removing service cap and core, attaching manifold gauge set, flowing nitrogen, and brazing are included. Emphasizes protecting service valve seals with water-saturated cloths and allowing joints to cool before removing cloths.
Leak Test and Evacuation: Procedures for leak testing with HFC-410A and nitrogen, followed by evacuation to a deep vacuum (below 500 microns) are outlined.
Electrical Connections: Wiring must conform to national and local codes. Requires a 24VAC transformer (40 VA minimum) and properly sized disconnect switch. Emphasizes using copper conductors only and grounding the unit.
Thermostat: Installation of a room thermostat on an inside wall, approximately 5 feet (1.5m) from the floor, is recommended.
Start-Up Procedure: Includes checks for service valve caps, voltage supply, wiring connections, indoor fan motor speed, thermostat settings, and refrigerant charge adjustment.
Adjusting Charge: Factory charge is for 15 feet of line set. Adjustments (0.6 oz per linear foot) are required for line sets shorter or longer than 15 feet. Subcooling tables are provided for both cooling and heating modes.
Control Board Diagnostics: The control board includes diagnostic LEDs (DS1 and DS2) to indicate system status, faults, and lockout conditions. A test mode can be initiated to reduce board timings and clear lockout conditions.
Defrost System: Operates in normal, calibration, and defrost modes. Initiates defrost based on frost detection (differential temperatures) or time (6 hours of heating mode compressor run time if coil temperature is below 35°F).
Delay Mode: A field-selectable function to reduce sounds during defrost mode transitions. A jumper on DELAY pins cycles the compressor off for 30 seconds.

Maintenance Features

Regular Inspections: Recommended regular inspections by a qualified service technician, including checks for motor operation, ductwork leaks, coil and drain pan cleanliness, electrical components, refrigerant level, airflow, air filter performance, blower wheel alignment, drain line cleanliness, and defrost operation.
Air Filter: Inspect and replace/clean monthly. Dirty filters are a common cause of poor performance and compressor failures.
Indoor Coil: Requires minimal cleaning if a clean filter is used. Professional service is recommended for cleaning.
Condensate Drain: Check monthly during cooling season for free flow and clean as necessary.
Condenser Coils: Periodically brush debris from coils using a soft bristle brush. Avoid damaging or bending fins.
Painted Surfaces: Annual application of automobile wax is recommended for maximum protection. Sprinklers should be directed away from the unit to prevent mineral buildup. In coastal areas, periodic washing of exposed surfaces and coils is recommended due to corrosive atmosphere.
Panel Removal: Instructions for removing and installing panels for coil access and service, emphasizing safety precautions for sharp edges and proper handling.