Salus RM-16A Relay Module – 16A Switching for Boilers, Pumps & UFH
The Salus RM-16A is a versatile relay module designed to extend the switching capability of thermostats and wiring centres. Rated up to 16 A / 250 V AC (4000 VA), it is ideal when a thermostat or receiver cannot handle the electrical load directly.
Compact and flush-mountable (Ø60 mm box), the RM-16A provides a safe and reliable way to connect boilers, pumps, electric underfloor heating mats, or other high-demand devices. It supports both voltage-free (NO/NC/COM) and 230 V inputs, ensuring compatibility across a wide range of heating systems.
Applications
The Salus RM-16A can be used in a variety of heating and electrical setups where extra switching power or volt-free contacts are required. Typical applications include:
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Gas boilers – when a thermostat with a 230 V output needs to be connected to a boiler that requires volt-free NO/COM or NC/COM contacts.
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Solid fuel boilers – provides the required NC/COM input for boilers that cannot be switched directly by a standard thermostat.
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Pumps and circulators – enables thermostats or wiring centres to safely switch pump loads up to 16 A.
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Electric underfloor heating mats – allows thermostats to control high-power UFH elements without overloading their internal relay.
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Wiring centres (e.g. KL06-M, KL08NSB, KL10, KL10RF) – adds flexibility by allowing connection of devices other than electro-thermal actuators, such as pumps or heating mats.
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General high-load switching – useful in any installation where the controlled device exceeds the relay capacity of a thermostat or receiver (up to 16 A).
Whether you are linking a thermostat to a gas boiler requiring volt-free outputs, a solid fuel boiler needing NC/COM control, or you simply need a way to switch larger loads like pumps or UFH mats, the RM-16A offers the flexibility and protection installers demand.
Product Specifications
| Feature | Details |
|---|---|
| Product Code | RM-16A |
| EAN (Barcode) | 5903669502401 |
| Brand | Salus Controls |
| Type | Relay Module |
| Mounting | Flush-mounted in Ø60 mm box |
| Supply Voltage | 230 V AC, 50 Hz |
| Maximum Load | 16 A / 250 V AC (up to 4000 VA) |
| Contacts | NO, NC, COM (volt-free output) |
| Applications | Boilers (gas/solid fuel), pumps, UFH mats, valves, high-load switching |
| Dimensions | 47 × 47 × 21 mm |
| Warranty | 5 years (manufacturer) |
| Country of Origin | Poland |
Key Features
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High load handling – safely controls devices up to 16 A, ideal for heavy-duty heating components.
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Multi-application design – commonly used for:
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Linking thermostats to boilers requiring volt-free switching (gas boilers).
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Connecting solid fuel boilers that require NC/COM input.
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Controlling UFH electric heating mats up to 16 A.
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Switching pumps or valves when connected via a wiring centre.
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Expands thermostat capability – ensures safe operation when the thermostat’s own relay is not sufficient.
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Compact flush-mount unit – neat installation into a Ø60 mm wall box.
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Reliable and durable – built for long service life with robust safety features.
The Salus RM-16A is a compact, powerful, and flexible relay module that covers multiple heating applications — from gas and solid fuel boilers to pumps, UFH mats, and valves. It’s a go-to accessory for installers who need to safely manage higher loads and ensure full system compatibility.
Order today from Getplumb, Reading’s independent plumbing and heating merchant. Available for fast UK delivery or same-day in-store collection.