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910.026.1 - EN (AUS)
ISTRUCTIONS PERTAINING TO THE INSTALLER
The boiler parameters may only be modi ed by professionally quali ed staff proceeding as follows:
a) press the , keys on the boiler’s front panel together for about 3 s until the parameter H90 appears on
the display;
b) press the keys to select the parameter for modi cation;
c) press the and keys to modify the parameter;
d) press the key to exit the programming function.
The following are the parameters generally used:
14. SETTING THE BOILER PARAMETERS
Parameter N.
Description
Factory setting
H90
Minimum D.H.W. temperature setting (°C).
10
H91
D.H.W. activation program
(0=active; 1=not active)
1
H505
Maximum temperature (°C) of the central heating circuit HC1 corresponding to:
- the main circuit in systems with just one zone;
- the circuit of the zone where the QAA73 room temperature control device is installed in
case of systems with more than one high-temperature zone;
- the high temperature zone circuit in mixed systems and if the SIEMENS AGU2.500
accessory is used.
80
H507
Maximum temperature (°C) of the central heating circuit HC2 of a system with more than one
zone, corresponding to the circuit of the low-temperature zone if the SIEMENS AGU2.500
accessory is used.
80
H516
Automatic Summer / Winter switching temperature (°C).
20
H532
Selection of temperature curve of central heating circuit HC1 (see Graph 1)
15
H533
Selection of temperature curve of central heating circuit HC2 (see Graph 1)
15
H608
PWM (%) Setting: Ignition load
See
table 2
H611
Speed setting (rpm) : Ignition load
H609
PWM Setting (%) : minimum power
H541-H610
PWM Setting (%) : maximum power Central heating / Domestic hot water
H612
Speed setting (rpm) : minimum power
H536-H613
Speed setting (rpm) : maximum power Central heating / Domestic hot water
H544
Pump post-circulation time in central heating mode (min)
3
H545
Burner operating pause time between two start-ups (s)
180
H552
Hydraulic system setting (see instructions provided with the SIEMENS AGU2.500 accessory)
H552 = 50 with AGU2.500 and with QAA73 + zones with room thermostat
H552 = 80 with RVA 47
2
H553
Con guration of heating circuits
H553 = 12 with AGU2.500
21
H615
Programmable function:
9
H632
Con guration of system with supplementary pump
H632 = 00001111 with AGU2.500 and with QAA73 + zones with room thermostat
H632 = 00001111 with RVA 47
The value of Bit could be 1 or 0.
Press the keys 5 and 6 to select the bit to modify (b0 is the bit on the right, b7 is the last bit on
the left).
To modify the Bit value press on the keys 7 and 8
00001100
H641
Fan overrun time setting (s)
10
H657
Setpoint of autonomous ANTILEGIONELLA function
60...80 °C = setting temperature range
0 = function inactive
0
If the electronic circuit board is replaced, make sure that the parameters set are those speci c to the boiler
model, as indicated in the documentation available from the authorised Service Centre.
