🎛️ Harvia C170VKK Control Panel – Professional 3-17kW Sauna Controller with Weekly Programming

Intelligent sauna management for commercial and residential installations with eight programmable schedules and remote start capability

♨️ Product Overview

The Harvia C170VKK Control Panel is a professional-grade external control unit engineered for electric sauna heaters rated between 3 kW and 17 kW. Designed as the successor to the trusted C150VKK, this advanced controller brings sophisticated automation to commercial saunas, spas, hotels, and housing developments where reliable, programmable operation is essential.

At its core, the C170VKK features a responsive 2.3-inch touchscreen interface that provides intuitive control over heating schedules, lighting, ventilation, and electronic locks. The integrated weekly timer allows operators to programme up to eight distinct heating schedules, ensuring the sauna is ready precisely when needed whilst minimising energy waste during quiet periods.

Manufactured by Harvia, Finland’s leading sauna specialist with over 70 years of expertise, this control panel delivers the precision engineering and durability expected in professional wellness environments. The sleek white steel enclosure and compact wall-mount design integrate seamlessly into any sauna control room or reception area.

⭐ Key Features

✅ Weekly Timer with 8 Programmable Schedules – Create customised heating programmes for different days and times, perfect for facilities with varying usage patterns

✅ 2.3″ Touchscreen Display – Intuitive interface with clear icons for temperature, time, and system status monitoring at a glance

✅ Remote Start Capability – Activate the sauna remotely via connected switch or building automation system for ultimate convenience

✅ Multi-Function Control – Manages heater operation, lighting (max 100W), ventilation fan (max 100W), and electronic locks from a single unit

✅ Wide Heater Compatibility – Works with electric sauna heaters from 3 kW to 17 kW (higher output possible with optional LTY17 power extension unit)

✅ Safety Switch Integration – Compatible with Harvia SFE safety switches and door switches for automatic shut-off protection

✅ Adjustable Temperature Range – Precise thermostat control from 40°C to 110°C with sensor calibration capability

✅ Resettable Overheat Protection – Built-in safety cut-out with manual reset eliminates component replacement after thermal events

✅ IPX4 Splash Protection – Rated for installation in humid environments adjacent to sauna rooms

✅ Dehumidification Mode – Automatic 45-minute drying cycle helps preserve sauna cabin condition and extend lifespan

✅ Power Failure Memory – Resume operation automatically after electrical interruptions (configurable setting)

✅ CE Certified – Full compliance with European safety standards for commercial and residential installation

🔧 Technical Specifications

Specification	Value
Model Number	C170VKK (SKU: SHCON170VKK)
Heater Compatibility	3-17 kW (expandable with LTY17)
Operating Voltage	400 V~ 3N, 50-60 Hz
Maximum Current	3 × 25 A
Temperature Range	40°C – 110°C
Timer Range	1-12 hours (18h/24h with supervision)
Pre-selection Time	0-12 hours
Programmable Schedules	8 weekly programmes
Control Panel Dimensions (H×W×D)	55 × 240 × 20 mm
Power Unit Dimensions (H×W×D)	225 × 240 × 75 mm
Recommended Installation Opening	425 × 260 × 150 mm
Total Weight	1.6 kg
Sensor Cable Length	5 m (approximately)
Light Control	Max 100 W, 230 V 1N~
Fan Control	Max 100 W, 230 V 1N~
Auxiliary Output	Max 100 W, 230 V 1N~
Temperature Sensor	NTC Thermistor (22 kΩ at 25°C)
Sensor Dimensions	51 × 73 × 27 mm
IP Rating	IPX4
Ambient Temperature Range	5°C to 50°C
Storage Temperature Range	0°C to 40°C
Construction	Steel housing
Colour	White
Certifications	CE Marked

📐 Compatible Heater Sizing Guide

The Harvia C170VKK controls heaters from 3 kW to 17 kW. Use this guide to determine the appropriate heater size for your sauna:

Basic Heater Sizing Formula:

1 kW = 1 - 1.5 m³ sauna room volume

Adjustment Factors:

Condition	Adjustment
Glass door/windows	+1.5 m³ per m² of glass
Uninsulated/log walls	+25-50% to volume
Outdoor/barrel sauna	+25-30% to volume
High ceiling (>2.3m)	Add extra volume

Heater Compatibility Examples:

Heater Power	Recommended Room Size	Typical Capacity
3-4 kW	3-6 m³	2-3 persons
6-8 kW	6-12 m³	3-6 persons
9-11 kW	9-16 m³	5-8 persons
12-17 kW	12-25 m³	6-12 persons

💡 Note: For heaters above 17 kW, the optional Harvia LTY17 power extension unit may be connected.

💷 Estimated Running Costs

The C170VKK controller itself consumes minimal electricity (display and electronics only). Running costs depend entirely on the connected heater size.

Energy Rate Used: £0.2635/kWh (Ofgem price cap Q4 2025)

Example: 9 kW Heater with C170VKK Controller

Usage Level	Sessions/Week	Hours/Year	Annual Cost
🏠 Light Use	2	150	£356
🏠 Regular Use	4	300	£711
🧖 Heavy Use	6	450	£1,067

Calculation Formula:

Annual Cost = Heater kW × Hours/Year × £0.2635

Example (9 kW heater, Regular Use):
9 kW × 300 hours × £0.2635 = £711.45

Per session cost: Approximately £3.56 per 1.5-hour session

⚠️ Actual costs depend on heater size, usage patterns, session length, and current energy rates. The C170VKK’s weekly programming helps reduce costs by preventing unnecessary heating cycles.

⚡ Installation Requirements

Electrical Requirements:

Requirement	Specification
Supply Voltage	400 V~ 3N (3-phase + neutral)
Frequency	50-60 Hz
Maximum Current	3 × 25 A
Dedicated Circuit	Required
Installation Location	Outside sauna room (dry area)

Control Panel Installation:

Position	Requirement
Mounting	Wall-mounted, vertical orientation
Installation Opening	425 × 260 × 150 mm (recommended)
Ambient Temperature	5°C to 50°C
Environment	Dry location, protected from direct water

Temperature Sensor Installation:

Position	Requirement
Location	Inside sauna room, on wall
Height	Approximately 1.0m below ceiling
Distance from Heater	Follow manufacturer guidelines (typically >1m)
Cable Length	Up to 5 m from control panel

⚠️ IMPORTANT: Installation must be carried out by a qualified electrician in accordance with BS 7671 (IET Wiring Regulations) and local building codes. The control unit must be installed outside the sauna room in a dry area.

🛡️ Safety Features & Certifications

Built-in Safety Features:

✅ Resettable overheat protection with manual reset button

✅ Adjustable maximum operating time (1-12 hours standard; 18h/24h supervised mode)

✅ 6-hour rest period option between heating cycles

✅ Safety switch input (compatible with Harvia SFE)

✅ Door switch input for automatic monitoring

✅ Automatic dehumidification mode (45-minute cycle)

✅ PIN code lock for access control

✅ Power failure memory (configurable)

Certifications:

✅ CE Marked – European conformity certification

✅ IPX4 Rated – Protected against water splashes from all directions

🎯 Ideal Applications

Application	Description	Key Benefits
🏢 Commercial Saunas	Gyms, wellness centres, health clubs	Weekly scheduling, remote start, access control
🏨 Hotels & Resorts	Guest amenities, spa facilities	Programmable schedules, energy management
🏠 Residential Complexes	Housing associations, apartment blocks	Shared facility management, booking integration
🧖 Day Spas	Professional wellness environments	Multi-function control, dehumidification
🏊 Leisure Centres	Public facilities with scheduled access	Timed operation, safety switch integration
🏡 Premium Home Saunas	High-end residential installations	Remote start, sophisticated control

🎛️ Control Options & Accessories

Included with Controller:

• C170VKK control panel with 2.3″ touchscreen
• Power unit with integrated circuit protection
• WX232 temperature sensor with overheat protector
• Sensor mounting hardware
• Installation and operation manual

Compatible Accessories (Sold Separately):

Accessory	Code	Description
Safety Switch	Harvia SFE	Mounts above heater, prevents operation if obstructed
Door Switch	Various	Magnetic sensor for door monitoring
Additional Sensor	WX325	Secondary temperature sensor for enhanced accuracy
Power Extension	LTY17	Enables control of heaters above 17 kW
Remote Switch	Various	External activation switch (short-circuit type)

❓ Frequently Asked Questions

Q: What size heaters will this controller work with? A: The C170VKK is compatible with electric sauna heaters from 3 kW to 17 kW. For more powerful heaters, the optional LTY17 power extension unit can be added.

Q: Can I programme the sauna to heat at specific times? A: Yes, the weekly timer allows up to 8 programmable schedules. You can set different heating times and temperatures for each day of the week, perfect for facilities with varying usage patterns.

Q: Does this controller work with remote/building automation systems? A: Yes, the C170VKK includes a short-circuit type remote input compatible with home automation systems, time switches, and external control switches.

Q: Where should the controller be installed? A: The control panel must be installed outside the sauna room in a dry location with ambient temperature between 5°C and 50°C. Only the temperature sensor is installed inside the sauna.

Q: What happens during a power cut? A: The configurable power failure memory can automatically resume operation after power is restored, or require manual restart depending on your preference setting.

Q: Can I control sauna lighting and ventilation with this unit? A: Yes, the C170VKK includes 230V outputs for lighting (max 100W) and fan control (max 100W), allowing centralised management of your sauna environment.

Q: Is a safety switch required? A: According to IEC/EN 60335-2-53, remote start functionality requires either a safety switch (on the heater) or a door switch. Harvia recommends the SFE safety switch for optimal protection.

Q: What is the dehumidification mode? A: When enabled, a 45-minute drying cycle runs after each sauna session at 40°C with ventilation activated. This helps protect the sauna cabin from moisture damage and extends its lifespan.

📥 Downloads & Resources

📄 Installation & Operating Manual – Complete installation guide with wiring diagrams and programming instructions

📄 Spare Parts Catalogue – Reference for replacement components

📄 EU Declaration of Conformity – CE certification documentation

🏆 Why Choose the Harvia C170VKK

✅ Finnish Engineering Excellence – Over 70 years of Harvia expertise in sauna technology

✅ Comprehensive Automation – Weekly scheduling with 8 programmable cycles for energy-efficient operation

✅ Future-Ready Design – Remote start capability and building automation compatibility

✅ Multi-Function Control – Single unit manages heater, lighting, ventilation, and locks

✅ Professional Safety Features – Integrated overheat protection, safety switch compatibility, and access control

✅ Energy Management – Programmable schedules and rest periods help reduce operating costs

✅ Proven Reliability – Updated version of the trusted C150VKK with enhanced features

🤝 Why Buy from Parts4Tubs

✅ UK-based company with dedicated local support

✅ Fast UK delivery on all orders

✅ Expert advice from sauna and wellness specialists

✅ Competitive pricing on genuine Harvia products

✅ Full warranty support and after-sales service

✅ Easy returns within 30 days

✨ Summary

The Harvia C170VKK Control Panel delivers professional-grade automation for electric sauna heaters from 3 kW to 17 kW. With its intuitive 2.3″ touchscreen, eight programmable weekly schedules, and comprehensive safety features, it’s the ideal choice for commercial saunas, hotels, leisure facilities, and premium residential installations. Finnish-engineered and CE certified, this controller provides reliable, energy-efficient sauna management backed by Parts4Tubs expert support and fast UK delivery.