SHOULD YOU MOVE HOUSE, PLEASE HAND THEM OVER TO THE NEXT OCCUPIER. 1. Introduction The Halogen Boiler is a wall-mounted appliance, suitable for installation onto small sealed heating systems. It incorporates all the components for sealed system requirements, these include, pressure gauge, pressure relief valve, expansion vessel, circulating pump and manual reset overheat thermostat. A manual air vent is also located on the appliance. There are two controls on the appliance, one adjusts the water

The 24 hour plug in timer provided can be used to provide this function. The operation pressure will rise and fall in line with temperature increase and decrease of the heating system water temperature. This is normal operation. However should the pressure fall below that set on the pressure gauge (0.5 bar) this is an indication there is either a leak in the heating system or the expansion vessel is too small for the heating system volume. You should consult your Service Engineer in order to cor