3. Installing the Boiler Receiver Units

The Genius system has been tested with a wide variety of boilers, heat pumps and other heat sources. There are 3 receiver units that can be used to control them: the Single Channel Receiver, the Dual Channel Receiver and the Electric Switch.

General Information

The Single Channel Receiver and Dual Channel Receiver are rated to 3A maximum. They can only be used to switch a zone valve or a boiler, not a circulation pump. Controlling a circulation pump will damage the receiver unit and void the warranty.

Combination Boiler (Single Channel Receiver)

The Single Channel Receiver is included in the Genius Starter Kit, and is most commonly fitted to a combination boiler (for properties without a hot water tank). In many cases you can fit the Single Channel Receiver where the wired house thermostat or boiler programmer was, as it uses a standard backplate. Make sure the wiring is correct for the Single Channel Receiver before fitting it to the backplate.

1. Always make sure the boiler and the wiring for the Single Channel Receiver are electrically isolated before you start work on any wiring.

2. Remove the backplate from the Single Channel Receiver by loosening the 2 screws on the bottom of the unit.

3. Mount the backplate on the wall where the Single Channel Receiver is to be placed, or (if using an existing compatible backplate) remove the front of the existing thermostat/receiver unit. The backplate must be on a flat surface to ensure good contact between the Single Channel Receiver and the backplate.

4. Wire the Single Channel Receiver backplate as shown in the wiring diagrams provided, checking this against the boiler installation manual.

5. Fit the Single Channel Receiver to the backplate by hooking it onto the top of the backplate first, then hinging the unit down. It should hinge easily and rest squarely on the backplate. If it does not attach easily first time, take it off and try again.

6. Tighten the screws underneath the Single Channel Receiver, and check the unit is securely and safely attached to the wall.

In normal operation the Single Channel Receiver shows a single solid light: red when there is no call for heat, and green when it is calling for heat.

System Boiler (Dual Channel Receiver)

The Dual Channel Receiver is included in the Genius Starter Kit + Hot Water, and is most commonly fitted to a system boiler (for properties with a hot water tank). The existing programmer must be replaced with the Dual Channel Receiver to control both the heating and the hot water. Make sure the wiring is correct for the Dual Channel Receiver before fitting it to the backplate.

1. Always make sure the boiler and the wiring for the Dual Channel Receiver are electrically isolated before you start work on any wiring.

2. Remove the backplate from the Dual Channel Receiver by loosening the 2 screws on the bottom of the unit.

3. Mount the backplate on the wall where the Dual Channel Receiver is to be placed, or (if using an existing compatible backplate) remove the front of the existing programmer/receiver unit. The backplate must be on a flat surface to ensure good contact between the Dual Channel Receiver and the backplate.

4. Wire the Dual Channel Receiver backplate as shown in the wiring diagrams provided, checking this against the boiler installation manual.

5. Fit the Dual Channel Receiver to the backplate by hooking it onto the top of the backplate first, then hinging the unit down. It should hinge easily and rest squarely on the backplate. If it does not attach easily first time, take it off and try again.

6. Tighten the screws underneath the Dual Channel Receiver, and check the unit is securely and safely attached to the wall.

In normal operation the Dual Channel Receiver shows a solid amber light, which means it is connected to the system. To check whether a channel is on, hold down that channel's button: the light at the top-left will show green for 2 seconds if the channel is on.

Hot Water Time & Temperature addon (Electric Switch)

The Hot Water Time & Temperature addon is an Electric Switch with a Temperature Probe (Floor/Tank), which measures the temperature of the hot water tank. The Electric Switch is wired into the same fused spur as the zone valve or immersion heater it controls, near the hot water tank. The end of the Temperature Probe goes into the tank's pocket, or under the tank's insulation.

If the hot water tank has a backup immersion heater, this can be wired to the Electric Switch's output, so you can control heating the hot water with the immersion heater as well as the boiler.

1. Always make sure the boiler, immersion heater and the wiring for the Electric Switch are electrically isolated before you start work on any wiring.

2. Locate the existing cylinder thermostat on the hot water tank.

3. If the cylinder thermostat's pocket is accessible, insert the Temperature Probe (Floor/Tank) into this pocket.

   1. If it is not available, attach the Temperature Probe to the outside of the tank (under the insulation) using thermal paste, so that it gets an accurate water temperature reading and has good contact with the tank.

4. Break out the relevant section of a 1-gang pattress for the wiring (allowing for the Temperature Probe to exit the pattress if needed), and fix the pattress to the wall. We recommend a 40mm pattress.

5. Pull through the relevant wiring, leaving plenty of spare.

6. Wire in the Electric Switch as shown in the wiring diagrams provided, checking this against the relevant installation manual (e.g. for the immersion heater).

7. Remove the front cover of the Electric Switch to expose the screw holes. To remove the cover, place a flat-bladed screwdriver into the gap underneath the Electric Switch and lever downwards.

8. Fit the Electric Switch into the pattress, making sure there are no trapped wires. Screw it in using standard pattress screws, and check the unit is securely and safely attached to the wall. Re-attach the front cover, starting at the top.

In normal operation there are no lights when the unit is not heating, and a red light next to 'HUB' when it is heating.