🎛️ Tylö RB Commercial Lite Relay Box – Advanced Sauna Control Interface for Heaters up to 10.7kW

Swedish-engineered control hub that transforms your sauna into a fully integrated, remotely-controllable wellness system

♨️ Product Overview

The Tylö RB Commercial Lite Relay Box is a sophisticated control interface designed by Swedish sauna specialists Tylö to bridge the gap between your control panel and sauna heating system. This essential component enables seamless communication between the Tylö Elite Cloud or Pure control panels and a wide range of sauna heaters up to 10.7kW, delivering professional-grade system integration for both residential and light commercial installations.

Backed by Tylö’s 75+ years of sauna manufacturing expertise, the RB Commercial Lite serves as the central nervous system for your sauna setup. Whether you’re controlling a modern Sense Commercial heater, an Expression unit, or upgrading legacy SK/SD/SDK models, this relay box provides the connectivity infrastructure needed for reliable, responsive sauna control. With built-in support for the Tylarium function, it even enables combined sauna and steam generator operation through a single control interface.

⭐ Key Features

✅ Universal Heater Compatibility – Works with Expression, Crown Commercial, and Sense Commercial heaters up to 10.7kW, plus legacy SK 6.6kW/8kW and SD/SDK 10.7kW models

✅ Elite Cloud & Pure Integration – Designed specifically for seamless operation with Tylö’s premium control panels, enabling app-based and remote control functionality

✅ Tylarium Support – Enables combined sauna heater and steam generator control through the Tylarium function with Steam Home compatibility

✅ Multi-Zone Connection Architecture – Features dedicated connections for lighting (×1), auxiliary devices (×1), and infrared panels (×1) for comprehensive system control

✅ 4-Port RS485 Communication – Four independent RS485 control panel connections (RJ10) allow flexible installation configurations and panel placement options

✅ Temperature Sensor Included – Professional-grade 10kΩ NTC sensor with 4-metre cable included for accurate sauna temperature monitoring

✅ Door Contact System Included – 5-metre door contact cable provided for integrated door status monitoring and safety interlocking

✅ Wall-Mounted Design – Compact 485 × 295 × 110mm enclosure designed for convenient wall mounting with easy access for maintenance

✅ External Switch Ready – Supports external switches with or without LED indication (12VDC, max 40mA) for customised control configurations

✅ Swedish Engineering Quality – Manufactured by Tylö, Sweden’s premier sauna manufacturer with over 75 years of industry leadership

🔧 Technical Specifications

Specification	Value
Model	RB Commercial Lite
Part Number	71016014
SKU	3071016014
Maximum Heater Capacity	10.7kW
Dimensions (W × H × D)	485 × 295 × 110 mm
Weight	6 kg
Temperature Sensor Type	10kΩ NTC
Temperature Sensor Cable	4 metres (included)
Door Contact Cable	5 metres (included)
Control Panel Interface	RS485 (RJ10 × 4)
Lighting Circuits	1
Auxiliary Connections	1
Infrared Connections	1
External Switch Voltage	12VDC
External Switch Current	Max 40mA
Connector Types	RJ10, RJ45
Max Cable Size (RJ10)	0.9mm / 0.2mm² / AWG24
Mounting	Wall-mounted
Country of Origin	Sweden

🔌 System Compatibility

Compatible Control Panels

Control Panel	Features	Compatibility
Tylö Elite Cloud	WiFi-enabled, app control, programmable schedules, cloud connectivity	✅ Full Support
Tylö Pure	Elegant design, essential controls, timer function	✅ Full Support

Compatible Sauna Heaters (Current Range)

Heater Series	Power Range	Notes
Sense Commercial	Up to 10.7kW	Professional-grade commercial heaters
Expression	Up to 10.7kW	Modern design heaters
Crown Commercial	Up to 10.7kW	Premium commercial range

Compatible Legacy Heaters

Model	Power Rating	Upgrade Benefit
SK	6.6kW, 8kW	Enables modern control panel integration
SD	Up to 10.7kW	Full control system upgrade
SDK	Up to 10.7kW	Cloud control capability when paired with Elite Cloud

Steam Generator Compatibility

System	Function
Steam Home	Tylarium function for combined sauna + steam operation

⚡ Connection Architecture

Signal Connections (RJ10)

Position	Function	Pin Configuration
Pos. 1	NTC Temperature Sensor	Pin 2-3: NTC
Pos. 2	External Switch	Pin 2: LED, Pin 3: SW, Pin 4: 12V
Pos. 3	Door Contact	Pin 2: LED, Pin 3: SW, Pin 4: 12V
Pos. 4	Secondary NTC/Bimetallic (Optional)	Multiple configurations
Pos. 6-9	RS485 Control Panels (×4)	Pin 1: A, Pin 2: B, Pin 3: 12V, Pin 4: GND

Power Connections

Connection Point	Function
Heater Output	Relay control for heaters 6-10.7kW
Lighting Output	Single lighting circuit control
Auxiliary Output	General purpose auxiliary device
Infrared Output	IR panel integration (Elite panels)
Distribution Box	Main power distribution connection

🛠️ Installation Requirements

Mounting Specifications

Requirement	Specification
Installation Type	Wall-mounted
Clearance Required	Adequate ventilation and maintenance access
Location	Dry area outside sauna room
Cable Routing	Clean routing with appropriate cable management

Electrical Requirements

Component	Requirement
Cable Specification (RJ10)	Max 0.9mm / 0.2mm² / AWG24
External Switch Supply	12VDC, max 40mA
Control Panel Communication	RS485 protocol
Door Contact Type	NO (Normally Open)
Temperature Sensor	10kΩ NTC type

Professional Installation Notes

⚠️ IMPORTANT: Installation must be carried out by a qualified electrician in accordance with BS 7671 (IET Wiring Regulations) and local building codes. All connections must comply with manufacturer specifications.

⚠️ Cable Routing: Ensure proper cable routing with appropriate separation between signal and power cables. Use conduit where required by local regulations.

⚠️ Ventilation: Mount in a location with adequate ventilation. Do not install inside the sauna room or in areas of high humidity.

🛡️ Safety Features & Integration

Built-in Safety Functions

✅ Door contact monitoring for safety interlocking

✅ Temperature sensor integration for accurate control

✅ External switch capability for emergency stop or secondary control

✅ LED indication support for external switches and door contacts

System Safety Integration

Feature	Benefit
Door Contact Monitoring	Automatic notification or heater control when door opened
Temperature Sensing	Accurate NTC monitoring prevents overheating
External Switch Support	Secondary control point for safety or convenience
RS485 Communication	Reliable digital communication protocol

🎯 Ideal Applications

Application	Setup Type	Key Benefits
🏠 Home Sauna Upgrade	Residential	Modernise legacy heaters with smart control capability
🏢 Light Commercial	Spa, gym, wellness centre	Professional control for heaters up to 10.7kW
🧖 Tylarium Installation	Sauna + steam combo	Single interface for combined sauna and steam control
📱 Smart Home Integration	Connected home	Enable Elite Cloud app control for existing installations
🔧 System Expansion	Multi-zone control	Add lighting, auxiliary, and IR panel control
♻️ Legacy System Upgrade	Older Tylö installations	Bring SK/SD/SDK heaters into modern control ecosystem

🎛️ Control Features When Paired with Elite Cloud

When combined with the Tylö Elite Cloud control panel, the RB Commercial Lite enables:

✅ Remote App Control – Control your sauna from anywhere via smartphone, tablet, or computer

✅ Programmable Scheduling – Set automatic start times to have your sauna ready when you arrive

✅ Cloud Connectivity – Monitor and control through Tylö’s secure cloud platform

✅ Multi-Function Control – Manage heater, lighting, and auxiliary devices from one interface

✅ Temperature Programming – Personalised temperature profiles and presets

✅ Usage Monitoring – Track sauna sessions and system status

📦 What’s Included

Component	Specification
RB Commercial Lite Unit	Main relay box enclosure
Temperature Sensor	10kΩ NTC with 4-metre cable
Door Contact	NO type with 5-metre cable
Installation Documentation	Multi-language installation and user guide

🔗 Compatible Accessories

Accessory	Part Number	Function
Tylö External Switch	9090 8045	External control with LED indication
Tylö Door Contact	9090 8035	Additional door contact sensor
Elite Cloud Control Panel	72005040	Premium WiFi-enabled control
Pure Control Panel	72001430	Elegant essential control

❓ Frequently Asked Questions

Q: What heater power rating can this relay box handle? A: The RB Commercial Lite is designed for sauna heaters up to 10.7kW, including Sense Commercial, Expression, Crown Commercial, and legacy SK/SD/SDK models within this power range.

Q: Do I need this relay box with my Tylö control panel? A: Yes, the relay box is required to connect Tylö Elite Cloud or Pure control panels to your sauna heater. It serves as the communication and power relay interface between the control panel and heating system.

Q: Can I control infrared panels with this unit? A: Yes, the RB Commercial Lite includes an infrared (IR) connection point. IR panel control is available when used with Tylö Elite control panels.

Q: Is the temperature sensor included? A: Yes, a professional 10kΩ NTC temperature sensor with 4-metre cable is included. The door contact with 5-metre cable is also included.

Q: Can I upgrade my older Tylö heater with this relay box? A: Yes, the RB Commercial Lite enables you to control legacy Tylö models including SK 6.6kW, SK 8kW, and SD/SDK 10.7kW heaters when paired with an Elite Cloud or Pure control panel.

Q: What’s the difference between RB Commercial and RB Commercial Lite? A: The RB Commercial Lite handles heaters up to 10.7kW, while the full RB Commercial handles heaters up to 20kW. The Lite version is ideal for residential and light commercial applications.

Q: Does this support steam generator control? A: Yes, the RB Commercial Lite is compatible with Steam Home for Tylarium function, enabling combined sauna heater and steam generator control through a single interface.

Q: What control panels work with this relay box? A: The RB Commercial Lite is designed exclusively for use with Tylö Elite Cloud and Tylö Pure control panels.

📥 Downloads & Resources

📄 Installation & User Guide (PDF) – Complete installation instructions with wiring diagrams in multiple languages

🏆 Why Choose the Tylö RB Commercial Lite

✅ Swedish Engineering Excellence – Manufactured by Tylö, industry leaders with 75+ years of sauna expertise

✅ Comprehensive Compatibility – Works with current and legacy Tylö heaters, control panels, and accessories

✅ Future-Proof Investment – Enable smart home integration and app control for your sauna system

✅ Professional-Grade Quality – Built to commercial standards for reliable, long-term performance

✅ Complete System Integration – Control heater, lighting, auxiliary devices, and IR panels from one system

✅ Tylarium Ready – Combined sauna and steam generator control in one package

🤝 Why Buy from Parts4Tubs

✅ UK-based company with dedicated local customer support

✅ Fast UK delivery from our well-stocked warehouse

✅ Expert advice from sauna and wellness specialists

✅ Competitive pricing on genuine Tylö products

✅ Full warranty support on all manufacturer products

✅ Easy returns within 30 days if you change your mind

✨ Summary

The Tylö RB Commercial Lite Relay Box is the essential control interface for anyone building or upgrading a professional sauna system with Tylö equipment. Handling heaters up to 10.7kW, this Swedish-engineered unit provides the critical connection between Elite Cloud or Pure control panels and your sauna heating system. With included temperature sensor, door contact, and support for lighting, auxiliary devices, and infrared panels, it delivers complete system integration in a compact wall-mounted package. Whether you’re installing a new Sense Commercial heater or upgrading a legacy SK/SD/SDK unit, the RB Commercial Lite brings modern control capability and Tylarium steam support to your wellness installation. Backed by Parts4Tubs expert support and fast UK delivery.