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INSTRUCTIONS PERTAINING TO THE INSTALLER 926.772.1 - GB/IE
Table 4
16. SETTING THE BOILER PARAMETERS
If the electronic circuit board is replaced, make sure that the parameters set are those specic to the boiler
model, as indicated in the documentation available from the authorised Service Centre.
(*) For these parameters see section 13 (hydraulic system).
The boiler parameters may only be modied by professionally qualied 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 modication;
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:
N° parametro Description Factory setting
H90 Setting for domestic hot water reduced temperature (°C) 10
H91
D.H.W. (Domestic Hot Water) program
(0 = enabled; 1 = disabled)
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 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
H536 Maximum speed at maximum output in heating mode (rpm - maximum speed limitation)
Refer to
paragraph 12.1
H612 Setting value of required speed (rpm) at low-re
H536-H613 Setting value of required speed (rpm) at high-re heating / domestic hot water mode
H541-H610 PWM (%) setting: maximum output in heating / domestic hot water mode
H544 Pump post-circulation time in central heating mode (min) 10
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
H552 = 80 with RVA 47
2
H553
Conguration of heating circuits
H553 = 12 with AGU2.500
21
H615 Programmable function 9
H632
Conguration of system with low loss header P1
H632 = 00001111 with AGU2.500
H632 = 00001000 with storage tank without low loss header
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 post-purge interval (s) 10
H657
Setpoint of autonomous ANTILEGIONELLA function
60...80 °C = setting temperature range
0 = function inactive
0