Carrier VRF Product Catalog
This interface bridges standard 24VAC thermostat signals with Carrier VRF indoor units. It enables designers and contractors to support familiar thermostat controls without redesigning the VRF system architecture.
Overview
The Carrier 40VM900008 24V Interface allows conventional 24VAC thermostats to operate Carrier VRF indoor units. By translating standard heating, cooling, and fan signals into VRF system commands, it provides a practical integration option for projects requiring traditional thermostat control while maintaining VRF performance.
Features
The interface converts heat, cool, and fan commands into VRF-compatible communication over the system bus. This ensures dependable operation while preserving intended indoor unit response and system logic.
Designed for one-to-one connection, each interface serves a single indoor unit for straightforward configuration and serviceability. Powered by a field-supplied 24VAC source, it installs easily in a standard junction box for indoor applications.
The 24V Interface for Carrier VRF (Variable Refrigerant Flow) systems allows a standard 24VAC thermostat to control VRF indoor units.
Documents
Brochure
Installation
Carrier / Bryant VRF 24V Interface Installation Manual
Submittal
Carrier VRF 24V Interface Submittal Drawing