Commercial & BAS
Beyond the house: rooftop and chilled-water systems, commercial refrigeration, three-phase power and VFDs, and the DDC networks, controllers and programming of building automation.
15 skills in 6 sections · listed in learning order
Commercial HVAC systems
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Rooftop and VAV systems
Install and service packaged rooftop units, economizers, variable-volume air handlers and VAV terminals.
Core No courses yet -
Commercial AC controls and safeties
Wire and test lockout relays, high and low pressure switches, oil pressure controls, low-ambient controls and hot gas bypass.
Advanced No courses yet -
Chilled water and cooling towers
Understand chillers, chilled-water loops, cooling towers and water-regulating valves and their operating limits.
Advanced No courses yet -
Multiple compressor and evaporator systems
Service parallel-compressor racks and multi-evaporator piping with capacity control and automatic pump-down.
Specialist No courses yet
Commercial refrigeration
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Commercial refrigeration fundamentals
High, medium and low temperature applications, defrost cycles, ice makers and cascade systems.
Core No courses yet -
Refrigeration regulators and controls
Set and service CPRs, EPRs, liquid line solenoids, defrost timers and terminators and ambient controls.
Advanced No courses yet -
Low-temperature system installation
Install medium and low temperature condensing units and evaporators with electric defrost, heated drains and correct line sizing.
Advanced No courses yet
Commercial power & drives
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Three-phase motors and power
Wire dual-voltage three-phase motors, reverse rotation, measure voltage imbalance and understand wye and delta.
Advanced No courses yet -
VFDs and commercial wiring
Set up variable frequency drives, including on a BAS network, and size commercial conductors by ampacity and voltage drop.
Advanced No courses yet
BAS fundamentals
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DDC and control theory
What a direct digital control system does for a building and how proportional, integral and derivative control keep a setpoint.
Core No courses yet -
Commercial prints and sequences of operation
Read commercial mechanical and electrical prints and schedules, and draw the sequence of operation for AHUs, VAVs and rooftop units.
Advanced No courses yet
BAS networks & controllers
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BAS networks and protocols
Understand Ethernet, RS-485, TCP/IP and the open protocols (BACnet, Modbus, LonWorks) that connect controllers.
Advanced No courses yet -
Controllers, sensors and actuators
Install field controllers and room operators, wire inputs and outputs, and apply the right sensor or actuator for each point.
Advanced No courses yet -
BAS programming and configuration
Connect to a controller, add points and addresses to the database and program logic in line, icon or block form.
Specialist No courses yet
Building maintenance
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Preventive maintenance programs
Build and run a preventive maintenance programme: coils, filters, belts, seasonal start-up and shutdown and the records that prove it.
Core No courses yet