Take practical control of your heating system with the EPH Controls R17 1 Zone Timeswitch — a reliable, mains-powered thermostat ideal for managing one heating zone with flexible scheduling. Designed to operate boilers, pumps or valves, the R17 provides clear ON/OFF control with multiple programming options and easy-to-use features that suit a wide range of residential and light commercial heating systems.
The R17 features a simple yet versatile interface that allows installers and end users to programme daily heating schedules across different modes — 24 Hour, 5/2 Day or full 7 Day — giving you the flexibility to match system operation to occupancy patterns and maximise comfort. A clear LCD display shows current time, day, active mode and set periods, while straightforward buttons make configuration on site easy.
Built with robust components and backed by EPH Controls’ reputation for quality, the R17 includes in-built frost protection and a volt-free SPDT output, making it suitable for controlling traditional boilers and heating equipment without complex wiring. Whether you’re installing a new heating system or upgrading older controls, the R17 provides dependable zone control with practical programmability.
Key Features
1 Zone Control: Simple ON/OFF thermostat for a single heating zone.
Multiple Scheduling Modes: Choose from 24 Hour, 5/2 Day or 7 Day programmes to suit daily use patterns.
Clear LCD Display: Shows time, day, current mode and heating status.
Volt-Free SPDT Output: Ideal for boiler or heating circuit control.
Frost Protection: Helps protect pipework and systems during low temperatures.
Robust Construction: Designed for reliability in household or commercial environments.
Technical Specification
Model: R17 – 1 Zone Timeswitch
Control Type: Programmable room thermostat / timeswitch
Power Supply: 200–240 Vac, 50–60 Hz
Switch Output: Volt-free SPDT contact
Contact Rating: 3 (1)A @ 230 Vac
Operating Modes: 24 Hour, 5/2 Day, 7 Day
Programming Periods: Up to three ON/OFF periods per day
Display: Backlit LCD showing time, day and programme status
Frost Protection: Built-in frost safeguard
Ambient Temperature: Approx. 0–50°C
Mounting: Surface or recessed conduit box mounting options
Dimensions: Approx. 100 × 35 mm (screen)
Warranty: Typically 5 years
TJ’s Tip
Mount the R17 about 1.5 m above floor level and away from direct sunlight or drafts to ensure accurate temperature sensing and optimal schedule performance. Take advantage of the 5/2 Day mode for typical weekday/weekend routines to maximise heating efficiency without complexity
* Effective from 3 December 2025 * Free delivery on order over €400, applies to Small & Light, Large & Heavy items within zone 1 only.
Zone Indicator:
To help you understand delivery availability, every item displays a zone icon, icons appear on the top-right corner of each product image:
Types of goods
Available zones
Descriptions
Small & light items
All Zone area
Items under 20kg weight & under 2m long, (some fragile items may not be included e.g. glass/mirrors)
Large and bulky items Extra Large items
Zone 1 & 2 only
Wet & hazardous bagged, items over 20Kg weight & oversized; Euronics white goods, TVs of all sizes.
Large Paint items (6L / 6L+)
Zone 1 only
Large hazardous items (6L+) - available for collection
Available zones
Indicator
Descriptions
All zone area
This icon with all zone area in green, indicates this items can be shipped to all Zone.
Zone 1 & 2 only
Zone 1 & 2 in green and zone 3 greyed out, indicates this product can only be shipped to Zone 1 and 2
Zone 1 only
Zone 1 in green zone 2 and zone 3 are greyed out, indicates this product can only be shipped to Zone 1 only.
Old Appliance Collection:
When you buy a large appliance, we’ll collect your old one for free through WEEE Ireland. Please ensure it is uninstalled, disconnected, and ready for pickup. Collection is like-for-like and takes place at the front door or apartment entrance. Restrictions may apply based on access and item type.
At TJ O'Mahony we will exchange or refund any Retail unused product returned to us in its original condition within 30 days of receiving it (*)You can return any unused product to us in its original condition for a full refund or exchange within 30 days of delivery.
This right to return does not apply to products that are non stock and only available to order such as catalogued doors, catalogued bathroomware and mixed paints which are made especially for your order.
Please note that we are unable to accept returns on certain bagged building products and materials, including (but not limited to) hard wall, cement, bonding, slates, and ridges. We appreciate your understanding and recommend checking product requirements carefully before purchase.