B4-pin wire harness
Four wires into the heater’s harness. Power and CAN arrive on one harness.
| Pin | Signal | Espar harness wire |
|---|---|---|
| 1 | +12V | Red |
| 2 | GND | Black |
| 3 | CAN-H | Yellow |
| 4 | CAN-L | Green |
Add ROAMiQ control to compatible "Espar" Hydronic S3 heater systems.
The ROAMiQ Eberspaecher Hydronic S3 Integration Module allows compatible Hydronic S3 systems to communicate with the ROAMiQ control platform.
Once integrated, the Hydronic S3 becomes part of your connected ROAMiQ ecosystem, giving you centralized control from the ROAMiQ screen and supported connected interfaces. Instead of relying only on a separate heater controller or standalone interface, ROAMiQ allows the Hydronic S3 to work alongside your power system, air conditioning, fans, lighting, sensors, cameras, water systems, and other connected devices.
Direct Hydronic S3 Integration
Allows compatible Eberspaecher Hydronic S3 systems to communicate with ROAMiQ for centralized heat control, system visibility, and automation.
Centralized Hydronic Heat Control
Control supported heater functions from the ROAMiQ screen or supported connected interface, reducing reliance on separate controllers, apps, or standalone panels.
Automation Ready
Use the Hydronic S3 as part of ROAMiQ scenes, alerts, and automations. Create routines for pre-heating, cold-weather protection, hot water support, cabin heat coordination, freeze protection, or full vehicle climate management.
Unified Climate and Comfort Management
Coordinate hydronic heating with fans, air conditioning, temperature sensors, power system data, and other connected devices so the vehicle can respond more intelligently as one integrated system.
Cleaner System Integration
Brings compatible Eberspaecher hydronic systems into the broader ROAMiQ ecosystem without adding unnecessary visible control clutter.
Built for Advanced Mobile Environments
Ideal for campervans, Class B RVs, expedition vehicles, overland builds, marine applications, and specialty vehicles where hydronic heat, hot water, and cold-weather reliability matter.
Turn the Hydronic S3 system on or off
Adjust supported temperature settings
Change supported operating modes
Coordinate cabin heat with fans and sensors
Trigger heat based on temperature or vehicle state
Support freeze-protection logic for cold-weather storage
Use power system data for smarter heating behavior
Include hydronic heat behavior in custom scenes such as Sleep Mode, Away Mode, Winter Mode, Freeze Protection, or Climate Mode
Designed for use with compatible Eberspaecher Hydronic S3 systems and the ROAMiQ Control Hub.
Compatibility depends on the specific Hydronic S3 model, controller configuration, communication method, firmware, ROAMiQ setup, and supported control functions.
Professional installation is recommended. Proper wiring, module placement, power, communication setup, coolant system configuration, and safe heater operation must be verified before use.
The installer is responsible for confirming that the Hydronic S3 is compatible with the ROAMiQ Eberspaecher Hydronic S3 Integration Module and that all supported heater functions operate safely and correctly after installation.
Case size: 61.6 × 41.6 × 16.6 mm (2.43 × 1.64 × 0.65 in), approx. The RJ45 jack adds about 2.6 mm on top.
ROAMiQ · Integration chip
Brings your Eberspaecher heater into ROAMiQ through its wiring harness, with Wi-Fi to the ROAMiQ system.
Follow the install guide ↗ for your device.
Four wires into the heater’s harness. Power and CAN arrive on one harness.
| Pin | Signal | Espar harness wire |
|---|---|---|
| 1 | +12V | Red |
| 2 | GND | Black |
| 3 | CAN-H | Yellow |
| 4 | CAN-L | Green |
5V power instead of the harness. Power only: the USB-C port has no data connection.
Power the chip from one source: the 4-pin harness (+12V) or USB-C (5V), not both.
120Ω termination is built in. The chip terminates its end of the CAN bus, so it replaces a separate end-of-line terminator where the install guide says to remove one.
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