Top Tech Tips – 37MU Crossover Wiring

Learn about HVAC wiring configurations for 45MU and 37MU units, including thermostat connections, DIP switch settings, and RS-485 communication. This tutorial also covers the Department of Energy’s Controls Verification Procedure (CVP), AHRI enforcement, compliance deadlines, and the application of new 24V interface kits (KSAIC0701, KSAIC0801) for ductless and crossover HVAC systems.

00:00 – HVAC Wiring & Thermostat Ramp-Up Rates
05:38 – Communication Wires & Scenario 1 DIP Switches
07:43 – Scenario 2 Full Communication Wiring
10:43 – Controller Options & Controls Verification Procedures
14:39 – CVP Deadlines & Equipment Inventory Rules
18:02 – 24V Interface Kits for Crossover & Ductless
22:41 – Powering the 801 Interface Kit
26:30 – Interface Selection Summary & Wrap-Up