TERMOVAR LU (EN) 06.12
3 (7)
MOUNTING
The valve unit is mounted upright either on the right or left hand side of the heating boiler. After pipework the
thermometers are pressed onto the front side of the unit.
When starting a new heating installation a very common problem is air in the pipe system. For a trouble free system
the pipework has to be made without air pockets. If this is not possible the system must be fitted with air vents.
The circulation pump should be started at the same time as the firing. The pump also must be stopped soon after the
fire has gone out so that the remaining hot water in the boiler can self-circulate to the storage tank. Several boilers
have factory installed thermostats for pump control. If not, a flue gas thermostat (ACASO Art.-Nr. 7100) must be used.
Self-circulation
For self-circulation the supply pipe should be connected to the top of the storage tank and the return pipe to the
bottom. Self-circulation is obtained as soon as the fire and the circulating pump have stopped. The remaining hot water
will now self-circulate to the storage tank.
Service
TERMOVAR is normally servicefree. The valve unit has three ball valves. All parts can be changed without draining
the system.
FUNCTION
1. Heat up phase
The circulation pump should be controlled by a thermostat
that measures flue-gas temperature. The pump will start
when the boiler is fired up and stop when it has ceased to
fire. The boiler water is circulating to the loading unit and
back while the temperature of the boiler is rising.