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First start-up
38
5
P24
Modulating pump maximum speed
It is possible to set the maximum speed value of the modulating pump during a
request for space heating operation.
70 ÷ 100
100
Value in percentage
P25 (1)
DHW buffer tank setpoint differential
It is possible to set the differential value with respect to the DHW setpoint at which
the DHW buffer tank charge is activated. For example, with the DHW setpoint at 50
°C and the parameter value at 5 °C, DHW buffer tank recharging starts at 45 °C (50-5)
and stops when the storage reaches the DHW setpoint. The parameter is only active if
the buffer tank probe OSND011 is connected.
3 ÷ 9
9
Value in °C
P26 (3)
Modbus address
Not used
-
1
Do not modify
P27 (3)
Modbus communication baud rate
Not used
-
0
Do not modify
P28 (3)
Modbus mode
Not used
-
2
Do not modify
P29
Post-circulation heating Δt
It is possible to set the temperature difference from the main burner shut down due
to the room thermostat, below which the pump is deactivated for the heating service.
0 ÷ 25
0
Value in °C
P30
Post-circulation DHW Δt
It is possible to set the temperature difference from the deactivation of the DHW
request to the pump deactivation for the DHW service.
0 ÷ 25
10
Value in °C
P31
Heating antifreeze temperature setting
It is possible to set the temperature of the water in the heating system at which the
antifreeze protection is activated.
5 ÷ 12
12
Value in °C
P32
Flowmeter enable
Not used
-
0
Do not modify
P33
Minimum water flow setting
Not used
-
28
Do not modify
P34
Activation of the auxiliary relay on the SVZ additional board
Not used
-
0
Do not modify
P35
Water flow control enable during start-up
It allows the verification, at each switch on, of the correct operation of the circulator.
0 ÷ 1
1
0 = disabled
1 = enabled
1. In presence of cascade controller ODSP039 (optional), if
DHW production is managed by the controller itself, param-
eter P01 must be set to value 0. Parameters P15, P21, P25 will
be inhibited as they are managed directly by the controller.
2. By setting a value of parameter P01 other than 5 (heating on-
ly), the parameters relating to DHW production, i.e. P09, P10,
P11, P15, P21, P25, P30 and the DHW antifreeze functions,
DHW probe error and diverter valve anti-locking are enabled.
3. Parameters P26, P27, P28 relating to Modbus settings must
be configured only in the presence of the cascade controller
ODSP039 (optional), following the instructions provided in
the manual supplied with the controller itself.
5.4.2
Caldaria 55.1
Table 5.2
Caldaria 55.1 electronic board parameters
Parameter Description
Range
Default
Setting
P00
Boiler model selection
0 ÷ 10
10
10 = Caldaria 55.1
P01 (1) (2) Boiler type selection
0 ÷ 5
5
0 = heating and buffer tank DHW
(with DHW function controlled by
cascade controller ODSP039)
1 = do not use
2 = heating and buffer tank DHW
3 = heating and buffer tank DHW
(DHW setpoint increased by 7 °C)
4 = do not use
5 = heating only
P02
Gas type selection
WARNING: before changing the parameter value, read the instructions in Paragraph
5.6
0 ÷ 1
0
0 = G20, G25, G25.3
1 = LPG, G30, G31
P03
Heating temperature setting
0 ÷ 1
0
0 = standard (30÷80 °C)
1 = reduced (25÷45 °C)
P04
Heating run-up
It is possible to set the time, during the start-up phase, that the boiler takes to reach
the maximum set power (for the space heating service).
0 ÷ 4
3
0 = disabled
1 = 50 s
2 = 100 s
3 = 200 s
4 = 400 s
P05
Anti-water hammer function
Enabling this function delays the DHW contact, for a time equal to the set value,
during the activation in DHW mode.
0 ÷ 20
2
0 = disabled
Value in seconds
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