Hep2O® - Connection to Boilers and Heaters

Connection to Boilers and Heaters

Where boilers incorporate a high limit cut out thermostat, pump overrun device, and have connections outside the boiler casing 350mm from the heat source, direct connection can be made to Hep2O®. Typically these boilers contain a copper heat exchanger and are low water content boilers.

Where any one of the above criteria for direct connection to a boiler cannot be met a minimum one metre run of copper pipe should be installed between the boiler and the start of the Hep2O® system.

In all cases (including instantaneous water heaters, caravan heaters etc.) care should be taken to ensure that appliances have the appropriate thermostatic controls and cut outs to ensure that operating conditions do not exceed the temperature and pressure limits laid down for Class S pipe (see Table No. 1). For any type of back boiler all water connections should be extended from the appliance to the outside of the fireplace opening in copper tube.

In these instances, where the heat output may be uncontrolled, a minimum one metre run of copper pipe should be used between the boiler and the start of the Hep2O® system.

Any gravity circuit of a solid fuel boiler should always be installed in copper.

Regulations require that metal pipe be used as discharge pipe from temperature/pressure relief valves on unvented water heaters, to or from a tundish or from safety valves on sealed central heating systems. On sealed systems where the safety valve is not provided within the boiler casing, the pipe between the safety valve and the boiler should be in copper.

All boiler connections should be made in accordance with the requirements of BS 5955, Part 8.

On heating systems where normal circulation may be drastically reduced (eg. thermostatic radiator valves fitted throughout), then a bypass should be fitted to the circulation pipework preferably controlled by an automatic differential pressure bypass valve.

During commissioning it is important to ensure that all trapped air is purged from the heating system before the boiler is operated. 'Pockets' of air can affect proper circulation and impair the correct operation of boiler temperature controls which could cause severe overheating.

Hep2O® With Heating
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