Overview
This document provides essential unit information for the Lennox ZCD Series packaged electric units, covering models from 7.5 to 12.5 tons (26.3 to 42 kW). These units are designed for standard cooling efficiency and offer various control system compatibilities with minimal field wiring. Optional electric heat is available in single or multiple stages, with heat sections ranging from 7.5kW to 60kW.
Information in this manual is intended for qualified service technicians only. Procedures are recommendations and do not supersede local codes.
Key Features and Components
- Available in standard cooling efficiency.
- Designed for various energy management thermostat control systems.
- Optional electric heat available in multiple stages.
- Includes important safety warnings regarding electrical shock and proper installation procedures.
- Detailed table of contents covers options, specifications, blower data, electrical data, parts arrangement, unit components, installation, start-up, charging, service checks, maintenance, accessories, wiring diagrams, and decommissioning.
Safety Precautions
Always prioritize safety. Ensure proper lockout/tag-out procedures before maintenance. Be aware of electrical shock hazards and ensure units are properly powered when required for safety features. Keep hands and clothing away from moving parts.
Installation, adjustment, alteration, service, or maintenance must be performed by a licensed professional HVAC installer or equivalent service agency. Improper installation can lead to property damage, personal injury, or loss of life.
Options and Accessories
A comprehensive list of available options and accessories is provided, including:
- Cooling System components (e.g., Condensate Drain Trap, Corrosion Protection, Drain Pan Overflow Switch, Low Ambient Kit).
- Blower - Supply Air components (e.g., Blower Motors, Drive Kits).
- Cabinet options (e.g., Combination Coil/Hail Guards).
- Indoor Air Quality sensors and accessories.
- Electrical components and kits.
- Electric Heat options and accessories.
- Economizer systems (Standard and High Performance).
- Outdoor Air components.
- Power Exhaust options.
- Roof Curbs and Ceiling Diffusers.
Specifications
Detailed specifications are provided for each model (ZCD092S5T, ZCD102S5T, ZCD120S5M, ZCD150S5M), including:
- Nominal Tonnage and Efficiency Type.
- Blower Type and Cooling Performance (Gross and Net Capacity, Air Flow, IEER, EER).
- Sound Rating Number and Refrigerant Type (R-454B).
- Electric Heat Availability.
- Compressor Type, Outdoor Coil and Indoor Coil details.
- Blower & Drive Selection data, including motor HP, RPM, and drive kit numbers.
- Filter specifications.
- Line voltage data.
Blower Data
Extensive blower data tables are included, detailing air resistance and performance for various air volumes and static pressures. This data is crucial for proper system design and installation, especially when considering optional electric heat sections and accessories.
Electrical/Electric Heat Data
This section provides critical electrical information, including:
- Voltage and frequency ratings.
- Compressor and fan motor data (Locked Rotor Amps, Rated Load Amps, Full Load Amps).
- Power Exhaust fan data.
- Indoor Blower motor data.
- Maximum Overcurrent Protection (MOCP) and Minimum Circuit Ampacity (MCA) for both the unit and electric heat components across different voltage and kW configurations.
