Thermostats

Can I use my Towerstat RF to switch the heating on/off manually?

You can set-up your Towerstat to operate manually. Please click on the link for a guide click here

Can the RF signal get through walls?

The RF signal will pass through brick, glass and other standard building materials. Each obstacle will reduce the strength of the signal and in some instances could reduce it enough to block communications altogether. Please click on the link for a guide that shows typical losses. click here

The RF thermostat doesn’t seem to bring the heating on?

For systems with an existing time control, set the heating to constant (fixed on). If there appears to be no communication between transmitter and receiver refer to the instruction on commissioning procedures.

The LCD display on the thermostat has disappeared and doesn’t control the heating?

If your thermostat is battery powered check that they have sufficient charge to operate your thermostat. If your thermostat is mains powered, check that the power is still present.

My programmable room thermostat changes program overnight?

You have to select which day or days you want to program. Select the day or days then enter the program number you want.

I have a programmable room thermostat and it has a mind of it’s own. It switches on when it should be off?

Check that the setback (economy) temperature is set low enough. Overnight the temperature drops and if the ambient room temperature drops below the setback (economy) set-point, the heating will come on.

I want to use your Towerstat RF. Can I use the existing timer to control on/off times?

It is possible to use your existing programmer/timer to control the on/off periods. Set your Towerstat RF to “P1” and follow the wiring instruction at the following link click here

I want to add a thermostat but don’t want to install any wiring?

There are Radio Frequency (RF) thermostats available that can work over considerable distances and control the system without the need of wiring.

Why do I need to provide a neutral for my thermostat to work?

Most bi-metal thermostats require a neutral to complete the circuit that powers an accelerator heater and possibly an indicator lamp. Bi-metal thermostats require the accelerator heater to give a small differential and give consistent switching.

Timers & Programmers

How do I mount a Towerchron QE1 or QE2?

The Towerchron QE1 & QE2 are mounted onto a standard backplate. This must be secured to a solid surface. click here

When installing a Towerchron QE1 or QE2 the LCD display will not show?

This can happen sometimes when the QE1 or QE2 is first energized. Press the “reset” button and the LCD display will appear.

Why does my digital programmer reset and sometimes freeze?

The main reason a digital programmer will appear to reset or suffer program corruption is a surge/spike in the mains supply or from the load itself. If you suffer power cuts or see your lights dim or brighten, your power supply is fluctuating. If your programmer is connected to a control circuit via a contactor or relay you could be suffering from “Back EMF”. To overcome both of these situations please refer to our suggested suppression techniques click here

The hot water neon indicator on my QM2 comes on when it should be off?

The neon indicator will illuminate if there is a back feed to the “hot water on” terminal. To overcome this you may need to add a relay. Please open example diagram click here

Can I use the QEG-1, Towerchron QE1 or QM1 on a combination boiler?

Yes, They have volt free outputs and are compatible with combination boilers.

I can’t get the hot water and heating to work independently?

Check that the programmer/timer is configured for a fully pumped system. The Towerchron QE2 and QM2 can be configured for gravity or fully pumped systems. Please refer to the installation instructions or click here

The heating won’t come on?

Check that the override has not been set to “Fixed off” or the thermostat set too low.

The heating is on constantly and the times do not appear to control anything?

Check that the override has not been set to “Fixed on”.

The day indication on the display keeps flashing and I can’t program or override?

The days need to be set for the real-time. The clock needs to know the time and day before the programmer will allow any programming to take place. Refer to the user instructions for setting the clock.

I can program my digital timer when running on the battery but it will not switch the output?

All of the digital timers that have a built in battery backup can be programmed and settings changed etc. whilst running on the battery. The full display and switching of outputs can only be achieved once the power supply has been connected.

The display is constantly flashing, How do I change the battery in my digital timer?

If your digital timer (Tactic 371+,5xx+, IHT-Digi+, SB-Digi+, Talento 3xx+,4xx+,7xx+) display is constantly flashing it is most likely the battery is drained and will need to be replaced. Please follow the step by step guide click here

How do I set my 24 hour analogue timer to come on between 6am and 8am?

You will need to set your timer to the current time by aligning the outer dial with the arrow marker on the face of the timer. You then move the tappets outward between the times you want the timer to be on. Please see the PDF for more a more detailed explanation click here

When I use my timer to turn on LED lights they stay on.

LED lighting has a transformer that uses power factor correction on the start-up circuit. This can cause an inrush current that is hundreds of times higher than the running current and overloads the contacts. Although this may only exist for 5 or 10 milliseconds, it is enough time to tack weld the output contacts. If you have this problem you will need to switch the lighting circuit with a contactor.
For more information please read the article on this website click here

I need to switch a break time alarm for a few seconds several times a day, what timer do I need?

The Talento 471 Pro is often used for break time sounders and the output can be set from 1 to 59 seconds and 1 to 59 minutes. This type of output is generally referred as “Pulse Output” and is a standard feature on the Talento 471 Pro. For a simple step by step programming guide please click here

Valves and TRVs

How do I assemble the TRV for use with 10mm pipe?

There are reducing bushes and a 10mm olive supplied with the TRV. Please open the PDF file to see how they are assembled. click here

When I turn on hot water it brings the heating on as well?

If the valve motor fails and the mid position valve fails to return to its “Port A normally Closed” position the hot water will circulate around the heating system when the hot water is being heated. The motor or valve will need to be replaced.

I have a Tower mid-position valve and when calling for heating only, the valve spools open but does not fire the boiler?

The grey wire must be connected to the cylinder satisfied and then to the programmers “hot water off” terminal. This provides 230V AC to the grey wire when the hot water is satisfied or not in demand. Without the grey wire connected in this way, when calling for heating only the valve will open until it reaches the mid position. Power on the grey will allow it to travel fully and energize the boiler and pump.

A 2 Port valve I have fitted appears to slam shut?

Check the flow direction. There is an arrow on the body of the valve to show the correct orientation.

I have noticed that after calling for heating only the valve does not return to close port “A”. Is this a fault?

No, the valve will remain in that state until power is removed or hot water is called for. The synchronous motor is rated for running in a continuously stalled state.

The valve will feel hot to the touch, as the energy of the stalled motor is dissipated through the valve body. This is normal and the valve is designed to operate in this way.

To avoid this happening…. Set the Hot water to go into demand after the heating has switched off.

Why should the actuator be positioned no more than 45 degrees from vertical?

This is to ensure that should a leak occur that water does not come into contact with the electrics.

I have a Tower valve. Can I change the actuator without having to remove the valve and drain down the system?

Yes, the “VAL322MP & VAL222MV” Tower valve actuators can be replaced independently of the valve. This is the same process for both valves click here

I have an existing S plan system and want to add a zone. How do I wire it?

Once you have added your zone valve you will need to wire it in parallel to your existing heating control valve. If you have an S-Plan system (2 x 2 Ports) click here

I have an existing system and want to add a zone. How do I wire it?

Once you have added your zone valve you will need to wire it in parallel to your existing heating control valve. If you have a Y-Plan system (Mid position) click here

I have a six wire MV2-28C 2 port zone valve. Can I change this for a 5 wire VAL228MV?

Yes, you will need to add a changeover relay to make the VAL228MV work in the same way. Please download the schematic showing how to connect a relay click here

I have a Tower mid-position valve. Can I use it as a diverter valve?

Yes, join the white and grey wires together and supply them with 230V AC to spool the valve open. The default port that is closed is port “A”. When power is supplied to white and grey the valve will motor until port “B” has closed. Remove power and the valve will return to Port “A” being closed and port “B” open.