Lennox Landmark KHA/KHB Packaged Heat Pump Specifications

Product Overview

The Lennox Landmark® rooftop units (KHA/KHB series) are designed for reliable and efficient performance, offering a new standard for rooftop units that can significantly improve indoor environments. These units are suitable for commercial applications and are available in various capacities.

Key Features:

• Scroll Compressors for high performance, reliability, and quiet operation.
• Copper tube and aluminum fin coil construction for enhanced heat transfer.
• Two independent formed outdoor coils for separation and cleaning.
• Indoor coil with rifled copper tubing for optimized sensible and latent cooling capacity.
• Condensate drain pan designed for proper drainage.
• Heavy-gauge steel panels with a two-layer enamel paint finish for durability.
• Fully insulated cabinet with fiberglass insulation.
• Variable speed ECM fan motors on high-efficiency models for energy efficiency and quiet operation.
• Standard efficiency models feature single-speed PSC fan motors.
• Multiple airflow options and configurations available.
• Advanced control systems for precise temperature and humidity management.
• Optional features include electric heat, economizers, smoke detectors, and UVC germicidal lamps for improved indoor air quality.

Model Number Identification

The model number provides key information about the unit's configuration:

KHB 120 S 4 B N 2 M

• Brand/Family: K = Landmark®
• Unit Type: H = Packaged Heat Pump
• Major Design Sequence: A = 1st Generation, B = 2nd Generation
• Nominal Cooling Capacity (Tons): 092 = 26 kW, 102 = 30 kW, 120 = 35 kW, 150 = 44 kW
• Cooling Efficiency: S = Standard Efficiency, H = High Efficiency
• Voltage: M = 380/420V-3 phase-50Hz
• Minor Design Sequence: 1 = 1st Revision, 2 = 2nd Revision, 3 = 3rd Revision
• Factory Installed Electric Heat: N = No Heat
• Blower Type: B = Belt Drive
• Refrigerant Type: 4 = R-410A

Performance Specifications

Cooling Performance:

• Net Cooling Capacity: 23.6 to 36.5 kW (80,600 to 127,700 Btuh)
• Net Heating Capacity: 23.3 to 36.3 kW (79,500 to 124,000 Btuh)
• Optional Electric Heat: 5.7 to 45.9 kW

Detailed cooling and heating ratings, including part load and full load performance at various temperatures, are provided in the specification tables.

Features and Benefits

Cooling/Heating System

• Scroll Compressors: High performance, reliability, and quiet operation with resilient mounting.
• Compressor Crankcase Heaters: Protect against refrigerant migration during low ambient operation.
• Check/Thermal Expansion Valves: Assure optimal performance throughout the application range.
• Reversing Valves: Enable rapid changeover between cooling and heating.
• Filter/Driers: Protect the system from dirt and moisture.
• High Pressure Switches: Protect the compressor from overload conditions with auto-reset.
• Freezestats: Protect the evaporator coil from ice build-up.
• Coil Construction: Copper tube construction with enhanced aluminum fins, silver soldered for leak testing.
• Indoor Coil: Optimized for sensible and latent cooling capacity.
• Condenser Coil: Two independent coils for separation and cleaning.

Cabinet

• Heavy-gauge steel panels with durable enamel paint.
• Full perimeter galvanized steel base rail with rigging holes and fork slots.
• Raised edges around duct and power entry openings for water protection.
• Units are shipped in downflow configuration but can be field converted to horizontal airflow.
• Duct flanges provided for horizontal duct attachment.
• Power entry through unit base or horizontal access knock-outs.
• Fully insulated with non-hygroscopic fiberglass insulation.
• Access panels for filter, heating/blower, and compressor/controls sections.

Controls

• 24V transformer with circuit breaker protection.
• Heat/Cool staging capability (up to 2 heat/2 cool) with DDC control system or thermostat.
• Low Voltage Terminal Block for thermostat/controller wiring.
• Night Setback Mode for energy savings.
• Defrost Control for efficient operation.
• Variable speed fan control on high-efficiency models.

Indoor Air Quality

• Disposable 51 mm filters furnished as standard.
• Optional Healthy Climate® High Efficiency Air Filters (MERV 8 or MERV 13).
• Optional Healthy Climate® UVC Germicidal Lamps to reduce microbes.
• Optional Indoor Air Quality (CO2) Sensors to monitor CO2 levels and adjust economizer dampers.

Options and Accessories

A wide range of options and accessories are available for customization:

• Economizer: Standard and High Performance options with single temperature or differential enthalpy controls.
• Outdoor Air Dampers: Motorized or manual, with or without air hoods.
• Power Exhaust Fan: For downflow applications with economizer.
• Roof Curbs: Hybrid and Adjustable Pitch Curbs for secure unit mounting.
• Ceiling Diffusers and Transitions: For supply and return air distribution.
• Thermostats: ComfortSense® 7500 and 3000 series programmable thermostats, BACnet compatible options.
• Electric Heat: Available in various kW capacities.
• Accessories: Condensate drain traps, drain pan overflow switches, low ambient kits, smoke detectors, corrosion protection, hail guards, and more.

Electrical Data

Detailed electrical data, including compressor and motor ratings, overcurrent protection, and minimum circuit ampacity for various electric heat configurations, is provided for standard and high-efficiency models.

Unit Clearances and Sound Data

Recommended service and operation clearances are specified. Outdoor sound data, including octave band sound power levels, is provided for each model.

Weight Data

Net and shipping weights in kg and lbs are listed for base and maximum unit configurations.

Dimensions

Detailed unit dimensions, corner weights, and center of gravity information are provided through diagrams and tables. Installation details for roof curbs, economizer applications, and ceiling diffusers are also included.