Beretta Power Plus Box 1001 EXT, Руководство по установке

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27
The burner is on when:
Manifold temperature <=Setpoint – ignition hysteresis.
Ignition hysteresis can be set, CH_Low_hyst_on = Par. 26,
preset to 5°C, can be set between 0 and 20°C.
The Master control unit converts the heat demand into
power demand for each slave control unit.
The burners are off when:
Manifold temperature >=Se shut-off hysteresis .
Shut-off hysteresis can be set (CH_Low_Hyst_off=Par. 27,
preset to 3, can be set between 0 and 20°C).
With the low temperature circuit attenuation parameter, Par.
25≠0, the low temperature thermostat contact is ignored
and a heat demand is present for the low temperature
circuit when:
Manifold temperature <=Setpoint – ignition hysteresis
The heat demand stops when:
Manifold temperature >=Se shut-off hysteresis .
The setpoint in this case coincides with the value set for
parameter 3 (Setpoint_t_ch_low) if the low temperature
thermostat contact is closed, whereas it is calculated as the
value set for parameter 3 less the attenuation (Setpoint_t_
ch_low-Attenuation_low) if the contact is open.
OPERATION WITH CLIMATIC CONTROL, PAR. 22=1
If the low temperature circuit attenuation is equal to 0 ,
Attenuation_low=Par. 25=0, its behaviour is the same as
the previous paragraph, with the exception that the setpoint
is calculated based on the outdoor temperature.
If the outdoor temperature = Tout_min=Par. 37, preset to
0°C, then setpoint =setpoint_T_Ch_low.
If the outdoor temperature = Tout_max=Par. 38, preset
to 18°C, then setpoint T_ch_high_ foot=Par. 24, preset to
50°C.
The setpoint is calculated linearly between the 2 outdoor
temperature values.
Preset to 0.
3
T_out_correct
Outdoor temperature correction (parameter 39)
Normally, the displayed value is the value read by the
microcontroller plus or minus a correction value (T_
visualizzata = T read by the /- correction).
The read value of the outdoor temperature can be corrected
by varying the value of parameter 39, (the permitted limit
for the correction is +/- 30 °C). In this phase, it is suggested
to use a reference thermometer.
Preset to 0.
4
Summer Mode
Summer function (parameter 38.)
The Summer Mode function is used to deactivate requests
received by the High Temperature and Low Temperature
circuits and from the zones when the outside temperature,
T outside, is equal to or above the value set in parameter
38.
The Parameter 38. can be set with values between 0 and
30 [°C].
Preset to 0 (summer function disabled).
5 T4_frost_protection
Antifreeze protection (parameter 35)
The electronic control unit has active antifreeze protection
also in stand-by mode. The antifreeze protection has two
levels, the first that activates the pump and the second that
activates the pump and the burner.
If the manifold temperature ≤ 5°C, the high temperature
circuit pump and the system pump (third pump) are active
or, with CH_type=1 and outdoor sensor connected,
if the outdoor temperature ≤ 3°C (par. 35) the high
temperature pump and the system pump (third pump) are
active
If after 10’ the manifold temperature ≤ 5°C
a burner is on at maximum until the manifold temperature
≥ 20°C.
If after 10’ the manifold temperature ≥ 5°C but, with CH_
type=1 (Par. 14 or 22) and outdoor sensor connected, the
outdoor temperature ≤ 3°C (par. 35) the pump continues to
operate until the outdoor temperature ≥ 3°C. Parameter 35
can be set between -30°C and 15°C.
Preset to 3.
6
Power_control_mode
Cascading management (parameter 33)
To manage the power delivered by the system, two
cascading strategies are possible. In both cases, the
Master control unit can only add a new burner when
another is on.
If the Master control unit must increase the number of
ignited burners, first check that the next burner can be
ignited: no errors present and modular system temperature
below the maximum. Otherwise, check another burner. If
no burner is ready for ignition, the master will decrease the
number of burners to ignite.