Sample 3 - Identify my System

Click on the More Details link or the picture for a larger picture and details of that particular system

The reason you have to identify your System is so that we can give you a complete break-down of your particular type of Heating and it’s associated controls. If you are a little unsure as to what System you have, we have provided the means of identification below; if you’re still unsure, ask a more knowledgeable friend or Heating Engineer.

After looking at the Systems below, you may find that you have an additional Two-Port otorized Valve. If you have, in all probability you live in a new house or the Heating System has only recently been installed, and you have what is called Zoned Heating. This means that the Heating System has individual control of:

1 The Hot Water Circuit.

2 The Downstairs Heating Circuit.

3 The Upstairs Heating Circuit.

You will also have a 3 Channel Programmer:

1 Hot Water

2 Heating 1

3 Heating 2

Apart from the extra Motorized Valve, the Heating System will be as described below.

This type of system combines heating and hot water in one unit, there is no hot water cylinder. Usually there are no tanks in the loft and all the household water is fed from the water main. There are 6 pipes connected to the Boiler ……………..

Combination Boilers

This system, as it’s name implies, only does the Central Heating. It is usually put in where a Gas Water Heater is already fitted and it’s either too costly or too disruptive to install a proper ……………..…………………………..

Central Heating Only - Hot Water from a different source

This is an older type of system, which can be identified as follows : Apart from the gas supply there will normally be four pipes coming from the boiler. Two 28mm pipes and two 22mm pipes…………………………………….

Gravity hot water and pumped central heating

This is one of the two most common systems. It can be used with any type of boiler, including system boilers, which are fed directly from the mains. Most modern boilers have a pump overrun

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Fully pumped system incorporating two, two-port, motorized valves

Fully pumped system with One Two Port Valve on Central Heating and Hot Water controlled by mechanical thermostatic valve e.g. Tapstat, or with No control

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This Fully Pumped System is not very good as the Mechanical Valves ( if fitted ) usually fail after a short period and you then have no control of the hot water, and there is no way of telling if they are ………………………..

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This is one of the two most common heating systems, it is usually referred to as Y Plan. It can be used with any boiler, including system boilers, which are fed directly from the mains.

The mid-position ……………....

Fully pumped system with one three port mid-position valve

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Fully pumped system with three-port diverter valve

This system looks the same as the three-port mid-position valve system. It differs in that only one port is open at a time and is usually wired to give priority to hot water, meaning that if you have a demand for hot …...

This system is not very good as there is no thermostatic control of either hot water or central heating. Consequently it is very costly energy-wise and the degree of comfort is poor. The system was usually fitted by Servowarm………..

Fully pumped system with manual three- port valve

Fully pumped system with two manual two- port valves

This is a diagram of a Fully Pumped Two Pump System. The Pump shown as the Controller Pump provides the hot water via the Cylinder, if you have a Pump Overrun on your Boiler it is this Pump…………………………………….

Fully Pumped System Using Two Pumps

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Twin-Head Pump system which has a Flow Port from the Boiler and two Outlet Ports, one for Central Heating and one for Hot Water. The two individual Pump Heads are controlled by Room and Cylinder …………………...

Fully Pumped System with Three-Port Diverter Valve combined with a Thermal Store (or Heat Bank) Cylinder

The heat-bank system above, heats the cylinder in the traditional way via the heating coil. The Diverter Valve gives priority to the Hot Water, which can be a drawback if you use a lot of Hot Water. It can …………………..

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Fully Pumped System with Three-Port Mid-position Valve combined with a Thermal Store (or Heat Bank) Cylinder

The heat-bank system above, heats the cylinder in the traditional way via the heating coil. The Mid-Position Diverter Valve gives equal priority to Central Heating and Hot Water. It can be used with any boiler……………..

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Fully Pumped System With Two Pumps, combined with a Thermal Store (or Heat Bank) cylinder.

This Heat-Bank system heats the cylinder directly from the boiler, pump 1, and the central heating is then taken from the Heat-Bank via pump 2. The mains water is fed through the heat-bank via an internal coil…………..

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Fully Pumped System With Two Two-Port Motorized Valves Combined with a Thermal Store(or Heat Bank) cylinder

The Thermal Store system above heats the cylinder the traditional way via the heating coil in the cylinder. The mains pressure hot water is heated by a separate coil in the cylinder. You can use any ……………………………...

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Fully pumped system with two, two-port, motorized valves combined with an un-vented Cylinder

The Un-Vented Cylinder is heated in the normal way, via a Coil in the Cylinder. The Cylinder is Pressurized by the Cold Main to 3bar, and when a tap is opened, the Main pushes the hot water out ……………….

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Fully Pumped System Using Twin-Head pump

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All this, and much more, in the members section.......

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