Lennox LRP13ACK Series Commercial Packaged Electric/Electric Units
Constant Torque Blower | Three-Phase | R-454B Refrigerant | 60Hz
SEER2: 13.40 | Tonnage: 3 to 5 Tons | Cooling Capacity: 34,000 to 56,000 Btuh | Optional Electric Heat: 5 to 23 kW
Product Overview
The Lennox LRP13ACK is a series of commercial packaged electric/electric units designed for efficient and reliable cooling and heating. These units feature a Constant Torque Blower, utilize R-454B refrigerant, and operate on a three-phase, 60Hz power supply. They are available in 3, 4, and 5-ton capacities, offering flexible solutions for various commercial applications.
A visual representation of the unit shows a large, rectangular, light-colored packaged rooftop air conditioning unit with visible louvers and a fan grille on top.
Model Number Identification
The model number LRP13ACK36EY-1A deciphers as follows:
- Brand: L = Lennox
- Product Type: RP = Light Commercial Packaged Unit
- Nominal SEER2: (Specific value indicated by model code)
- Unit Type: AC = Electric/Electric Unit
- Refrigerant Type: K = R-454B
- Minor Revision Sequence: A = 1st Generation
- Major Revision Sequence: 1 = 1st Generation
- Voltage: Y = 208/230V-3 phase-60Hz, G = 460V-3 phase-60Hz
- Blower: E = High Efficiency Constant Torque Blower Motor
- Nominal Cooling Capacity: 36 = 3 tons, 48 = 4 tons, 60 = 5 tons
Approvals and Warranty
Approvals
- AHRI Standard 210/240 certified
- Design Certified by ETL Intertek
- Unit and components ETL, NEC, and CEC bonded for grounding
- Meets UL 60335-2-40 Refrigerant Detector Requirements
- Optional electric heaters are ETL listed and tested per DOE/FTC regulations
- Seismic Certification for 2018 IBC and 2019 CBC ASCE 7 (with Optional Seismic Strapping Kit)
- ASHRAE 90.1 compliant
Warranty
- Compressors: Limited five years
- All other covered components: Limited one year
Key Features
Cooling System
- R-454B Refrigerant: Low GWP (Global Warming Potential), Zero ODP (Ozone Depletion Potential), Low Toxicity/Lower Flammability (A2L). Unit is factory pre-charged.
- Evaporator and Condenser Coils: Copper tube with aluminum fin coils, factory leak tested.
- Anti-Microbial Condensate Drain Pan: Features an anti-microbial additive to improve indoor air quality and reduce drain line blockage; insulated to reduce condensation; side drain connection.
- Drain Pan Overflow Switch: Monitors condensate level and shuts down the unit if the drain becomes clogged.
- Outdoor Coil Fan Motor: Weather-protected, heavy-duty, with coated steel fan blades and corrosion-resistant coated steel fan guard; internally mounted and totally enclosed.
- High Pressure Switch: Protects the system from high pressure conditions with automatic reset.
- Loss of Charge Switch: Shuts off the unit if suction pressure falls below a set point, providing loss of charge and freeze-up protection.
- Service Valves: Fully serviceable brass valves in discharge and liquid lines.
Refrigerant Detection System (RDS)
- Complies with UL 60335-2-40.
- Factory installed on all units using R-454B.
- Includes leak detection sensor(s) and mitigation control for safe operation.
- Monitors indoor coil area for leaks; prevents compressor/heating operation if a leak is detected.
- Energizes blower to mitigate refrigerant concentrations during a leak.
Compressor
- Scroll Compressor: High volumetric efficiency, uniform suction flow, constant discharge flow, quiet operation, and low gas pulses for reduced operational sound.
- Motor is internally protected from excessive current and temperature.
- Installed on resilient rubber mounts for vibration-free operation.
- Operation: Utilizes two matched involute spiral scrolls to create gas pockets that compress refrigerant.
- Muffler in the discharge line reduces operating sound levels.
Cabinet
- Foil-faced insulation minimizes heat loss and reduces operating sound.
- Powder paint finish for maximum durability.
- Full perimeter heavy-gauge galvanized steel base rails with rigging holes and forklift slots.
- Raised edges around duct and power entry openings for water protection.
- Easy service access with steel louvered panels for coil protection.
- Airflow Choice: Shipped with supply and return air duct covers installed for downflow or horizontal conversion.
- Electrical Inlets and Service Valves: Field wiring inlets and service valves with gauge ports are centrally located for easy access.
Controls
- Refrigerant Detection System (RDS) Control: Monitors leak detection sensor, provides LED status, and includes a Test/Reset button.
- 24 Volt Transformer: 70VA transformer furnished and factory installed.
- Smoke Detector (Field Installed): Photoelectric type, available with one or two sensors for supply and/or return air ducts.
Blower
- Direct drive blower with statically and dynamically balanced, resiliently mounted wheel.
- Constant Torque Blower Motor: DC Brushless ECM motor programmed for constant torque at selectable speeds.
- Features a fixed blower “On” delay to prevent cold air delivery during heating demand.
Indoor Air Quality
- Air Filters: Filter rack furnished as standard; filters must be field provided.
Electric Heat (5-23 kW)
- Field installed internal to the unit.
- Helix wound nichrome heating elements exposed directly in the air stream for instant heat transfer.
- Low element temperatures for long service life.
- Cutoff limit control provides positive protection against excessive temperatures.
- Factory assembled with controls installed and wired.
- Note: Field wiring for electric heat requires a separate power source.
Economizer
- Standard Economizer: Features gear-driven action, return/outdoor air dampers, plug-in connections, nylon bearings, neoprene seals, and a 24-volt spring return motor. Allows relief of excess air and prevents blow-back.
- High Performance Economizer: Approved for California Title 24 standards, features low-leakage dampers (AMCA Class 1A Certified), gear-driven action, high-torque motor, stainless steel bearings, and enhanced seals.
- Economizer Controls: Damper minimum position adjustment for cost savings; Free Cool LED indicates suitable outdoor air for free cooling. Default free cooling setpoint is 55°F.
- Economizer Control Modules: Standard and High Performance modules available, offering parameter settings for operation based on outdoor air conditions.
- Outdoor Air Dampers: Available as single blade (0-25% fixed) or automatic modulating models.
Specifications Summary
| Model | Nominal Tonnage | Gross Cooling Capacity (Btuh) | SEER2 | Refrigerant | Compressor Type |
|---|---|---|---|---|---|
| LRP13ACK36 | 3 | 35,200 | 13.4 | R-454B | Scroll (1) |
| LRP13ACK48 | 4 | 47,500 | 13.4 | R-454B | Scroll (1) |
| LRP13ACK60 | 5 | 58,000 | 13.4 | R-454B | Scroll (1) |
Detailed specifications including air flow, motor HP, coil dimensions, filter type, and line voltage are available in the full document.
Optional Accessories
A wide range of field-installed accessories are available to enhance unit functionality:
- Cooling System: Compressor Crankcase Heater, Compressor Timed-Off Control, Freezestat, Low Ambient Kit (40°F).
- Cabinet: Base Rail Openings Closure Kit, Rectangular to Round Duct Adaptor Kits, Tool-Less Filter Access Kit.
- Controls: Smoke Detector (one or two sensors), Bottom Power Entry Kit.
- Electric Heat: Available in 5 kW to 23 kW options.
- Economizer: Standard and High Performance Economizers, Single Enthalpy Controls, Motorized or Manual Outdoor Air Dampers.
- Roof Curbs: Clip Curbs (various heights), Adjustable Pitch Clip Curb, Seismic Strapping Kits.
Optional Temperature Control Systems
Lennox offers advanced thermostats for optimal climate control:
- CS7500 Commercial 7-Day Programmable Thermostat: Premium, full-color touchscreen interface, up to 4 Heat/3 Cool, built-in and remote sensors, 5-2 or 7-day scheduling, Heat/Cool Auto-Changeover.
- CS3000 Commercial 5-2 Day Programmable Thermostat: Multi-stage thermostat with intuitive display, push-button operation, up to 2 Heat/2 Cool, built-in and remote sensors, 5-2 day scheduling, Heat/Cool Auto-changeover.
Performance Data
Extensive performance data tables are provided, detailing cooling capacity, motor input, and sensible-to-total ratios across various outdoor air temperatures, wet bulb temperatures, and air volumes for each tonnage model (3, 4, and 5 Ton). These tables allow for precise system selection based on specific operating conditions.
Electrical and Electric Heat Data
Detailed electrical specifications are included, covering voltage, compressor and motor ratings, maximum overcurrent protection (MOCP), and minimum circuit ampacity (MCA) for both the unit and various electric heat configurations (5 kW to 23 kW). Electric heat capacities are also listed by input voltage and kW output.
Weight and Dimensions
Weight Data
Net and shipping weights (in lbs and kg) are provided for each model (LRP13ACK36, LRP13ACK48, LRP13ACK60), as well as for select accessories like the Tool-Less Filter Access Kit, Economizer, Outdoor Air Dampers, Electric Heat components, and Roof Curbs.
Installation Clearances
Required installation clearances are specified for Front, Right Side, Left Side, Back, Back (with Optional Economizer), and Top, provided in inches and millimeters.
Unit Dimensions and Center of Gravity
Detailed diagrams illustrate the unit's physical dimensions, corner weights, and center of gravity. These diagrams provide critical information for installation planning and handling.
Revisions
Recent revisions include the removal of Hurricane Strapping Kits from optional accessories.
Certifications
The units are AHRI Certified and ETL Listed, ensuring compliance with industry standards for performance and safety.
