Lennox L Series Packaged Units: Engineering Data
This document provides comprehensive engineering data for the Lennox L Series packaged units, including models LCA (Cooling & Electric Heat), LGA (Cooling & Gas Heat), and LHA (Heat Pump). It covers units for the 180, 210, and 240 series, operating on a 50Hz electrical system.
Key Features and Specifications
The Lennox L Series units are designed for commercial applications and offer various configurations for cooling, heating, and heat pump functionality. Key features include:
- Model Series: LCA (Cooling & Electric Heat), LGA (Cooling & Gas Heat), LHA (Heat Pump)
- Capacities: Available in 15, 17.5, and 20 Ton capacities (52.8, 61.5, and 70.3 kW)
- Construction: Heavy gauge galvanized steel cabinet with powder enamel paint finish, fully insulated.
- Cabinet Access: Hinged access panels with tool-less handles for easy service.
- Coil Construction: Copper tube construction with ripple-edged enhanced aluminum fins.
- Compressor Crankcase Heaters: Standard on all models.
- Filters: Disposable 2-inch (51 mm) pleated commercial grade filters.
- Integrated Modular Control (IMC): Solid-state board with comprehensive unit controls and diagnostics. Features include blower on/off delay, service relay output, dirty filter switch, economizer control (multiple modes), electric heat staging, extensive unit diagnostics, and more.
- Blower Motors: Available with 3 hp, 5 hp, and 7.5 hp motors.
- Outdoor Coil Fans: Polyvinyl chloride (PVC) coated fan guards.
- Supply Air Blower: Belt drive, forward curved blades, statically and dynamically balanced.
- Optional Accessories: A wide range of factory or field-installed accessories are available, including various control systems (electro-mechanical, electronic, Novar), economizers, outdoor air dampers, power exhaust fans, gravity exhaust dampers, roof mounting frames, ceiling diffusers, and electric heat options.
Model Number Identification
The unit model number provides information about its type, capacity, efficiency, and design sequence. For example, 'LCA180S' indicates:
- LCA: Unit Type (Cooling & Electric Heat)
- 180: Cooling Capacity (15 Ton)
- S: Cooling Efficiency (Standard Efficiency)
- 1M: Voltage and Phase (380/420V, 3-phase, 50Hz)
Technical Data Tables
The document includes extensive tables detailing:
- Specifications: Dimensions, weights, electrical characteristics, refrigerant charge, and performance data for cooling and heating capacities across different models and operating conditions.
- Blower Data: Air volume, static pressure, and motor specifications for various configurations.
- Optional Accessories: Part numbers and specifications for factory and field-installed options.
- Electrical Data: Rated load, locked rotor, and full load current for compressors, fan motors, and blower motors.
- Cooling Ratings: Detailed performance data under various indoor and outdoor temperature conditions.
- Heating Ratings: Performance data for heating capacity under different temperature conditions.
Guide Specifications
Prepared for architects, consulting engineers, and mechanical contractors, these specifications outline the general requirements for the installation and performance of the Lennox L Series units, covering aspects like system type, weight, dimensions, air distribution, cooling and heating systems, cabinet construction, service access, blowers, fans, and optional accessories.
Diagrams
The document includes dimension diagrams for LCA, LGA, and LHA models, illustrating top, side, front, and back views, along with center of gravity and corner weight information. It also provides diagrams for accessory dimensions and installation clearances.
