Combi boiler preheat systems with Elite or EMMA

Combi Boiler Systems.

A combi boiler is an efficient method of heating a house and hot water. A combi boiler system generally eliminates the need to have a hot water tank as it heats the water as it is required in the dwelling.

Add Solar PV or a Wind Turbine

If the dwelling has PV panels or a Wind Turbine installed the exportable power is lost to the grid where it could be used for heating water and reduse the amount of fossil fuel the combi boiler uses.

Add an EMMA or an Elite system

By adding in a preheater tank and an EMMA or an Elite depending on the size of the install the exportable power can be diverted into the preheater tank and used appropriately in the house for showers and general household requirements.

Our schematics indicate under the downloads tab of this section describe how this can be done but the boiler manufacturer should always be consulted prior to commensing installation for guidance.

 

Combi Boiler Modulating combined with Elite EC

Combi Boiler Preheat System 



Modulating Boiler



The attached Modulating Boiler schematic details how newer more sophisticated boilers with modulating flames can be plumbed so EMMA can provide preheated water to the shower or domestic hot water with the addition of minimal pipework and an antisclad valve on the input to the boiler. If the preheated tank feeds water above 60'C through the boiler  the antiscald valve will cool it down by mixing it with the cold feed to antiscald levels and the boiler wont have to heat the water at all. If the water feed from the preheat tank is not hot enough the boiler will read water temperature and apply an appropriate flame to achieve the correct output temperature. This is a very economical way of heating the water and getting the best efficiency from both systems.



How ELite with Export Isolation functions



In the same schematic the Elite heats the buffer cylinder by monitoring import/export and sending any exportable power into the cylinder. In areas of clustered PV installs in newbuild estates for example the Elite with EC can be used to limit the export to the grid to a set limit by diverting some or all of the exportable energy to the tank. The tank can be sized correctly inconjunction with the peak day of the year output in kWh from the PV panels, the export limit available, daily electricity usage and the daily domestic hotwater requirments to prevent an over export event. If this event should occur the Export Control Isolation Relay will disconnect the inverter for a specific length of time before automatically re-engaging the inverter as per the standard EMMA with export control guidlines.



A Perfect Combination



By combining the Elite with the PV install and the Preheater system the Feed in Tarriff is maintained by keeping the inverter online, the Client uses less fossil fuel to heat their water helping the environment and their pocket and the Network Operator maintains a stable grid safe in the knowledge that exportable power is being put to good use and not flooding the network.


Combi Boiler Non Modulating combined with Elite EC

Combi Boiler Preheat System 



Non Modulating Boiler



The attached Non Modulating Boiler schematic details how older less sophisticated boilers can be plumbed so EMMA can provide preheated water to the shower or domestic hot water if it is above 60'C or through the boiler if it needs a boost in temperature. The adjustable thermostatic mixing valve is set to the max inlet temperature advised by the boiler manufacturer. An anti-scald valve ensures that the temperature of the water going to the facets or shower is regulated to a safe temperature. The two non return valves are essential for the plumbing circuit to flow correctly.



How ELite with Export Isolation functions



In the same schematic the Elite heats the buffer cylinder by monitoring import/export and sending any exportable power into the cylinder. In areas of clustered PV installs in newbuild estates for example the Elite with EC can be used to limit the export to the grid to a set limit by diverting some or all of the exportable energy to the tank. The tank can be sized correctly inconjunction with the peak day of the year output in kWh from the PV panels, the export limit available, daily electricity usage and the daily domestic hotwater requirments to prevent an over export event. If this event should occur the Export Control Isolation Relay will disconnect the inverter for a specific length of time before automatically re-engaging the inverter as per the standard EMMA with export control guidlines.



A Perfect Combination



By combining the Elite with the PV install and the Preheater system the Feed in Tarriff is maintained by keeping the inverter online, the Client uses less fossil fuel to heat their water helping the environment and their pocket and the Network Operator maintains a stable grid safe in the knowledge that exportable power is being put to good use and not flooding the network.


Standard Elite DHW heating

Standard Elite Operation 



Direct heating of a Stnadard Vented Tank



The attached Standard Vented Cylinder Heating with Elite schematic details how an existing our standard method of DHW heating can be used in conjunction with Elite. The stat on the immersion is set to antiscald temperature so the output temperature will be at a safe level. If the tank is heated by Elite then ther oil, gas or electricty heating will not be required to heat the tank instead or it may only have to top up the temperature slightly.



A direct cylinder is not recommended for areas with high limescale content in the water supply. The limescale tends to build up on the pipework of the cylinder and on the element inside, which can shorten the lifespan of that section of the system.



How ELite with Export Isolation functions



In the same schematic the Elite heats the buffer cylinder by monitoring import/export and sending any exportable power into the cylinder. In areas of clustered PV installs in newbuild estates for example the Elite with EC can be used to limit the export to the grid to a set limit by diverting some or all of the exportable energy to the tank. The tank can be sized correctly inconjunction with the peak day of the year output in kWh from the PV panels, the export limit available, daily electricity usage and the daily domestic hotwater requirments to prevent an over export event. If this event should occur the Export Control Isolation Relay will disconnect the inverter for a specific length of time before automatically re-engaging the inverter as per the standard EMMA with export control guidlines.



A Perfect Combination



By combining the Elite with the PV install and the Preheater system the Feed in Tarriff is maintained by keeping the inverter online, the Client uses less fossil fuel to heat their water helping the environment and their pocket and the Network Operator maintains a stable grid safe in the knowledge that exportable power is being put to good use and not flooding the network.

ELITE Control

The ELITE is the latest addition to the EMMA product family. While we consider it to be the Elite of power diversion and monitoring it is in fact EMMA's little sibling or as we call it EMMA lite.

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EMMA Cascade

The modular heating system that can grow and grow

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EMMA with Export Control

EMMA with EC allows for installs to have a greater renewable output than the Max Export Capacity (MEC) on site by diverting excess energy to heat.

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