Frequently Asked Questions

For the basic operation of storage heaters, please see our technical downloads section to find the manual for your heater.

For the basic operation of panel heaters, please see our technical downloads section to find the manual for your heater.

Heatstore have an Auto Flow Thermostatic range of showers which constantly monitors the flow and temperature at up to 4 times a second to enable the unit to control the temperature to within +/-0.5ºC. The ‘Thermalock’ control ensures a higher temperature cannot be accidently selected without the operation of a push-button override. It conforms to the most recent and stringent of NHS guidelines set down to ensure safe showering in the care market and is also available in an extended hose and rail Care Pack option.

All instantaneous showers should be connected to the rising mains water supply, unless the unit is a Power Shower or Pumped Electric unit, as there are limitations on water services in order for the unit to perform correctly. Units can be connected to a header tank providing there is adequate head height to generate a minimum of 0.7 bar pressure.

No, we do not recommend any Heatstore shower is fitted to a combi-boiler. Our power shower would be fitted to a hot tank and cold tank supply, our Aqua Flow shower would be fitted to a cold tank supply. All other showers would be recommended to connect to the rising mains water supply.

It depends on the kW rating of the shower being installed and what wiring/breakers are already installed. All wiring must be carried out by a fully qualified electrician and must comply with the current wiring regulations to meet the specification of the unit to be installed.

If there is in-sufficient water pressure for your unit it would normally be down to a poor service from your service provider “lines could be blocked or restricted”, if this is not the case then your unit could be fed from a header tank with an adequate working head height. Please contact the Heatstore Technical Department for advice.

The minimum running water pressure for the shower unit is 0.7 Bar.

If replacing an existing unit you must ensure that your water and electrical services are adequate for the unit to be installed.

The installation must comply with the current wiring regulations to meet the specification of the unit to be installed. This all depends on the kW rating of the shower unit. Please see below:

Please note in order to comply with the current building regulations you should have a competent certified installer carry out any electrical work to the latest IEE Wiring Regulations.

A power shower or Pumped Electric unit are the only recommended units as there are limitations on water services in order for any shower unit to perform correctly. Standard mains shower units can only be connected to a header tank providing there is a adequate head height to generate a minimum of 0.7 bar pressure.

You can only pump water from a storage tank to feed to a shower; you can not pump mains water directly to a shower as it goes against local water by-laws.

Electric showers only take water from your mains cold water supply and heat this water by passing it over electrically heated elements. The temperature of the water you get from your shower and the flow rate is therefore determined by three key factors:

1. The temperature of your mains cold water supply (this can vary from 5ºC in winter to 20ºC in summer)
2. The heating ability of your element in kW
3. The pressure of your mains water supply

In simple terms, the higher your chosen showers kW rating the better the potential water flow rate from your shower at your preferred showering temperature. As a guide you can see below how the kW rating affects your shower flow:

• 8.5kW up to 27% more flow than a 7.5kW heater
• 9.5kW up to 42% more flow than a 7.5kW heater

An easy fit or compression fitting is required to connect to the unit, providing they meet the specification of the installation.

The installation must comply with the current wiring regulations to meet the specification of the unit to be installed. Recommended cable size:

However please note in order to comply with the current building regulations you should have a competent certified installer carry out any electrical work to the latest IEE Wiring Regulations.

If the fuse is under rated then the fuse will keep blowing. If the fuse is over sized then if there is an electrical problem then the unit could burn out and this could be a potential fire hazard.

Most units unless other wise stated have the water entry on the bottom right hand side of the unit that can be connected to a water supply coming from bottom, rear or top of the unit. The electrical connection block is located on the right hand side, mid way and has a top and bottom knockout section + rear cable entry top. However for an ideal replacement shower where more entry points may be required to accommodate existing pipe work and wiring, the Aqua Premier Electronic offers left, right, top, bottom and rear options for water and cable entries.

If water is leaking from the base of the unit it could be due to the shower being over pressurised (a build up of lime scale or a bent/restricted shower hose). Water will be coming from a small black pipe behind the shower hose. Please contact Heatstore Service on 0117 923 5375 for advice on how to rectify this.

All serial numbers are located on the bottom left of the unit next to the water out-let hose

If you experience poor flow from your unit this could be due to poor water services or that the unit is being used on half heat setting and trying to achieve a hot shower “increasing the heat setting should increase the water flow rate”.

The HS10 & HS15U unvented water cylinders do not come with any accessory packs as it depends upon the individual installation. If required Pressure Reducing Pack A – 0380, Expansion Vessel Pack B – 0380 and TMV2 Thermostatic Blending Valve Pack C – 0382 may be purchased separately.

The HS30U and HS50U unvented water heaters are supplied with the pressure reducing valve & expansion vessel kits required to install these products. If required a TMV2 Thermostatic Blending Valve Pack C – 0382 may be purchased separately.

The HSUDC and HSUIC unvented water cylinders are supplied with the pressure reducing valve and expansion vessel kits required to install these products. If required a TMV2 Thermostatic Blending Valve Pack C – 0382 may be purchased separately.

The HSUDC Unvented Water Cylinders are all 550mm in diameter.

The HSMF Multiflow will not be able to provide sufficient flow for sinks or baths as the open flow of a sink tap is greater than the products capability to supply hot water at a suitable temperature. Our Unvented water heater range would be able to provide for these applications. Please contact the Heatstore Technical Department for sizing.

No, Our Unvented water heater range would be able to provide for these applications. Please contact the Heatstore Technical Department for sizing.

Yes but the taps have to be Vented Taps rather than standard taps. Heatstore have a range of suitable vented taps. Please contact the technical department for more information.

No, the Pack A-0380 & Pack B-0381 and Pack C-0382 can only be used with the unvented water heaters. Heatstore have a range of suitable vented taps. Please contact the technical department for more information.

No, however Heatstore have a range of unvented water heaters to cover multiple outlets for small or large applications.

This is normal and not a fault with the product, as this is due to the way the product vents when heating the stored water.