Gruppo Imar Thea 65 MN Kondens, Инструкции по установке, пусконаладке и обслуживанию

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11
CONNECTION TO DHW STORAGE TANK
DHW Storage with temperature control by NTC sensor
The boiler is arranged to be connected to a DHW storage tank supplied with a NTC sensor
for a continuous DHW temperature control.
In order to connect the sensor, the terminal board inside the control panel must be accessed
and the sensor cable terminals must be connected to the corresponding clips. NTC sensors
are compatible with BETA ones = 3435-10K at 25°C.
DHW Storage with temperature control by thermostat
The boiler is arranged to be connected to a DHW storage tank supplied with a thermostat
for the DHW temperature setting and adjusting.
In order to connect the thermostat, the terminal board inside the control panel must be
accessed and the thermostat cable terminals must be connected to the corresponding
clips. The compatible thermostatic contact is at low tension (clean contact).
After the hydraulic and electrical connections have been effected, all the temperature
control devices have to be connected.
In order to activate the DHW option with storage, the parameter A0=1 must be set from
the installer menu.
After the DHW option has been activated, the NTC sensor/thermostat has to be activated,
by selecting respectively the parameter A18=0 (sensor) / A18=1 (thermostat) from the
installer menu.
The boiler is ready to operate according to the available devices; in DHW mode, the display
will show the
symbol and its set point temperatures (sensor) or the symbol only
(thermostat).
The request for DHW by storage tank has the priority towards the request for CH.
The presence of the NTC sensor for the DHW temperature control allows to select, by the
multifunction knob, the desired DHW work temperature.
ADJUSTMENT
While in DHW mode, by the A9 and A10 parameters from the installer menu it is possible to
adjust:
- The primary circuit temperature during the preparation for the storage tank;
- The temperature difference between set point (set sensor) and the temperature detected
by the DHW (only NTC sensor mode) for the burner ignition and switch off (isteresis).
Pict. 10
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COM.
N.O.
N.C.
STORAGE
TANK
SENSOR
STORAGE
TANK
THERMOSTAT
220 VDC
3-WAYS VALVE