Fiamma Elektra 18 kW N 016 TROLLEY User And Maintenance Manual - page 18
17
REQUEST HEATING
At the closing of the room thermostat contact, if the board is in winter mode, the system
pump is only activated if the primary exchanger temperature is higher than the set
temperature using the parameter P6. If the temperature value detected by the primary
exchanger probe is lower than the flow temperature setpoint set, the triacs are turned on in
sequence according to the power required. This only occurs after a time set by parameter
P5, to allow for example the opening of eventual zone valves. The instantaneous power of
the boiler and the control of the triac G1÷G5B is by PID controller. At the end of the
request, the circulator remains powered for a time equal to the value set by parameter P4.
Degassing function
During the execution of the automatic venting function (10 min.) The pump works from time
to time at low and high speed and transports the air formations out of the pump directly to
the system vent valve.
ISTRUCTION PUMP
The pump consists of a hydraulic system, a wet rotor motor with permanent magnet rotor and
an electronic control module with integrated frequency converter. The control module contains
a control button, the pump is also equipped with an LED indicator to display the operating status
of the pump.
Functions
All functions can be set, activated or deactivated using the command button.
Variable pressure difference (
∆
p-v):
The delivery value of the pressure difference is increased linearly between ½ H and H in the
permitted flow range. The value of the pressure difference generated by the pump is adjusted
to the set delivery value. This control mode is particularly suitable for heating systems with
radiators, since the flow noise on the thermostatic valves is reduced.
Difference of constant pressure (
∆
p-c):
The delivery value of the pressure difference H is maintained, within the permissible flow range,
constantly on the set delivery value up to the maximum characteristic curve. This control mode is
recommended for underfloor heating systems or older heating systems with large pipes, but also
for all other applications that do not have variable plant characteristic curves, such as boiler drain