Allied 4SHP16LE - User Manual

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508220-01 Issue 2132 Page 1 of 43

SERVICE MANUAL

4SHP16LE/4HP16L

(P) 508220-01

*P508220-01*

Table of Contents

Technical Specications - 4SHP16LE .........................2

Technical Specications - 4HP16L ..............................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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The provided manual describes the ALLIED Air Enterprises 4SHP16LE/4HP16L Split Heat Pump, a residential HVAC unit designed for both heating and cooling applications. This document serves as a service manual, offering comprehensive details on installation, operation, maintenance, and troubleshooting.

Function Description:

The 4SHP16LE/4HP16L is a split heat pump system, meaning it consists of an outdoor condensing unit and an indoor coil (or air handler/furnace). Its primary function is to provide year-round comfort by cooling the indoor space during warmer months and heating it during colder periods. The unit utilizes R-410A, an ozone-friendly HFC refrigerant, and is designed to work with a matching indoor coil and line set. A filter drier, approved for R-410A, is pre-installed in the unit to ensure proper system operation and reliability. The system incorporates a demand defrost system that measures differential temperatures to detect frost buildup on the outdoor coil, initiating defrost cycles only when necessary, which can lead to longer running times between defrosts compared to time/temperature-based systems.

Important Technical Specifications:

The manual provides detailed technical specifications for both the 4SHP16LE and 4HP16L models, covering various tonnage options (18, 24, 30, 36, 41, 42, 47, 48, 59, 60 for 4SHP16LE and 18, 24, 30, 36, 42, 48, 60 for 4HP16L). Key electrical data includes:

Voltage/Hz/Phase: 208-230V/60Hz/1Ph for all models.
Voltage Range: 197-253V.
Minimum Circuit Ampacity (MCA): Varies by model, e.g., 10.6A for 4SHP16LE118P-50 to 30.4A for 4SHP16LE160P-50.
Maximum Overcurrent Device (MOCD): Ranges from 20A to 50A depending on the model.
Compressor Rated Load Amps: Varies from 7.7A to 22.2A.
Compressor Locked Rotor Amps: Ranges from 48A to 127.9A.
Fan Motor Rated Load Amps: 1A for smaller units (18-30) and 2.6A for larger units (36-60).
Fan Motor Rated HP: 1/6 HP for smaller units and 1/3 HP for larger units.
Fan Motor Nominal RPM: 825 RPM for smaller units and 820 RPM for larger units.

Physical dimensions (width, depth, height) and shipping weights are also provided, with units ranging from 28.25" x 28.25" x 33.25" (e.g., 4SHP16LE124P-50) to 32.25" x 32.25" x 43.25" (e.g., 4SHP16LE160P-50), and shipping weights from 180 lbs to 309 lbs.

Sound ratings are given in Sound Power (dBA) and Estimated Sound Pressure (dBA) at various distances (1, 2, and 3 meters). For instance, most 4SHP16LE models have a Sound Power of 75-76 dBA, translating to 67-68 dBA at 1 meter.

Refrigeration data includes:

Refrigerant Charge: Factory charged for 15 feet of line set, varying from 114 oz to 188 oz depending on the model. Adjustments are required for different line set lengths.
TXV (Thermostatic Expansion Valve): Specific TXV models (H4TXV01, H4TXV02, H4TXV03) are required for different unit sizes.
Refrigerant Line Sizes: Suction line diameters range from 3/4" to 1-1/8", and liquid line diameter is consistently 3/8" across all models.

Performance data (SEER, EER, AHRI Rated Capacity, Sensible Capacity, HSPF, Btuh, COP) is provided for various indoor coil/air handler matches, indicating the unit's efficiency and capacity in both cooling and heating modes.

Usage Features:

Installation Flexibility: The unit can be installed on a solid, level mounting pad, elevated above ground or roof surface to prevent ice buildup and ensure proper drainage. Clearances for airflow, wiring, and service are specified to ensure quiet operation and maximum efficiency.
Operating Ambients: Minimum outdoor operating ambient in cooling mode is 55°F, and maximum is 125°F. For heating mode, the maximum outdoor operating ambient is 66°F. Cold weather accessory kits may be required for operation below 25°F.
Control Board Diagnostics: The unit features a control board with diagnostic LEDs (DS1 and DS2) that indicate system status, fault conditions, and lockout codes, aiding in troubleshooting.
5-Strike Lockout Feature: To protect the compressor, the control logic counts pressure switch trips. If a pressure switch opens and closes five times during a Y1 (Input) cycle, the control enters a lockout condition, which can be reset by cycling 24V power or shorting TEST pins.
Demand Defrost System: This intelligent system monitors differential temperatures to detect frost accumulation on the outdoor coil, initiating defrost cycles only when performance is degraded, leading to more efficient operation.
Delay Mode: A field-selectable function to reduce occasional sounds during defrost mode transitions. When a jumper is installed on DELAY pins, the compressor cycles off for 30 seconds.
Thermostat Compatibility: The unit is controlled by a wall-mounted thermostat, with various configurations available. The manual provides general guidance on fan switch settings (AUTO/INT for humidity control, ON/CONT for continuous circulation) and system switch settings (HEAT, COOL, AUTO, Emergency Heat).

Maintenance Features:

Regular Inspections: The manual recommends regular inspections by a qualified service technician, including checks for motor operation, ductwork air leaks, coil and drain pan cleanliness, electrical components, refrigerant levels, airflow, condensate drainage, air filter performance, blower wheel alignment, and defrost operation.
Air Filter Maintenance: Users are instructed to inspect air filters monthly and replace or clean them as required. Dirty filters are highlighted as a common cause of poor heating/cooling performance and compressor failures.
Condensate Drain Check: Monthly checks for free flow of drainage during the cooling season are recommended.
Condenser Coil Cleaning: Periodical brushing of debris (grass cuttings, leaves, dirt, dust, lint) from condenser coils is advised to maintain efficiency and prevent damage. Users are warned not to damage or bend coil fins.
Painted Surface Care: Annual application of automobile wax is recommended for maximum finish protection. In areas with high mineral concentration in water, sprinklers should be directed away from the unit to prevent premature deterioration. For sea coast areas, periodic washing of exposed surfaces and coils is suggested due to corrosive salt atmosphere.
Panel Removal: Detailed instructions with illustrations are provided for safely removing and installing the unit's panels for service access, emphasizing caution to prevent personal injury or damage.