TECH ST-45, Руководство пользователя

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ST-45 User's Manual
If you select this option, the regulator will switch into the water heater
priority mode. Activating the hot consumption water pump will cause the
regulator to switch into the water heater priority mode. In this mode, the
(hot consumption water) heater pump is activated until the set
temperature is reached. Then, the pump is shut off and the central
heating circulation pump is activated.
In order to activate the hot consumption water pump, it is necessary to
raise the setpoint temperature above the pump activation threshold (the
pump activation threshold to be adjusted in the service menu).
The temperature can be changed in the H.C.W Set function (see point
II 2).
In this mode, the fan and the feeder are operated as long as the
temperature is below 62°C to prevent the boiler from overheating. Such
condition will be maintained until the water heater setpoint temperature
is reached. When the temperature is reached, the hot consumption water
pump is shut off and the central heating pump is activated.
The central heating pump will run until the water heater temperature
drops below the setpoint value; then, the central heating pump is shut
off and the hot consumption water pump is activated.
The hot consumption water priority function consists in that the
consumption water is heated up before heating up water in radiators.
ATTENTION : the boiler should have non-return valves mounted on the
central heating pump and hot consumption water pump circuits. A valve
mounted on the pump will prevent the hot consumption water from being
discharged from the water heater. A valve mounted on the central
heating circuit will not let the hot consumption water move from the
water heater into the house circuit.
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