Designed for Consulting Mechanical Engineers & Design-Build Contractors, this class will cover:

✅ What is VRF?

✅ How to Design a VRF System

✅ Common Pitfalls in VRF Design

✅ Heat Pump vs. Heat Recovery Systems

✅ Benefits & Advantages of VRF

✅ Applications & Why VRF?

Date: June 26, 2025

Instructor: Steve McCool, Rick Palomar, Mark Mata & Connor Lucchesi

Information to be Covered:

• Industry-Wide Governing Codes & Standards (Brief Overview)

• Standard Crest & Crest w/ Hellcat Combustion Technology

• Lochinvar Crest w/ Hellcat Combustion

• Product Identification and Description of Product Components

• Product Sequence of Operation/How Product Operates in Conjunction with System

• Controls - Explanation of the Different Methods of Remotely Controlling the Units

• Warranty & Maintenance

August 28, 2025

8:30-12noon

Who Should Attend: Plumbing Engineers/ Plumbing Engineers for Design/Build Contractors

Topics to be Covered:

• Overview of heat pump refrigerant cycle

• Discuss Minimum Lift and Water Side DeltaT

• Current 3rd Party Testing Standards (Energy Star, DOE, AHRI Standard 1300)

• Typical refrigerants used for CHPWH

• General design considerations

• “Single-Pass” vs. “Multi-Pass” configurationvs. piping schematic

• Peak and off-peak scenario hydronic analysis

• General comments on “single-pass” vs.“multi-pass”, pro’s/cons

• Electric Swing Tank vs. Electric Backup –hydronic analysis

• General comments vs. gas-fired, ASPE Fixture Tables

• CHPWH Sizing Methods-Peak/Off-Peak Sizing Method-Ecotope Sizing Method-CBECC-Res 2019 Sizing Method

• Other Sizing Methods – ASHRAE Load Profile

• Sizing example with CHPWH Sizing Methods

September 25, 2025

8:30am-4:00pm

Taught by: Nick Ekdahl, CPD, GPD, Kendal Smith & R.J. Santiago, CPD, GPD

Who Should Attend: Engineers & Plumbing Contractors

Information to be Covered:

• Centrifugal Pumps
• Pump Curves
• System Syzer
• Pressure Booster Application & Design
• DHW Recirculation Design and Sizing
• Water Heating System and Sizing Techniques
• Recirculation Systems

October 23, 2025

8:30am - 4:00pm

Taught by: Steve McCool, Facilities Support Group Manager

Who Should Attend: HVAC/Plumbing contractors and/or facilities service/startup / maintenance / installation personnel

Topics to be Covered:

• Anatomy of High Efficiency / High Modulation Gas Appliances

• Proper Installation, Piping, and Controls

• Standard Crest & Crest w/ Hellcat Combustion Technology

• Lochinvar FTXL, Knight XL Condensing Boilers & Armor Condensing Water Heaters

• Product Identification and Description/Function of Product Components.

• Product Sequence of Operation - How Product Operates in Conjunction with the System

• Controls - Explanation of the Different Methods of Remotely Controlling the Units.

• Warranty & Maintenance

• Troubleshooting Operation Issues w/ ANY Condensing Appliance Lochinvar, or other.