Setting The Boiler Parameters - Baxi Power HT Series Installation, Operation And Maintenance Manual

14. SETTING THE BOILER PARAMETERS

The boiler parameters may only be modified by professionally qualified 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 modification;
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:
Parameter
Description
N.
H90 Minimum D.H.W. temperature setting (°C).
D.H.W. activation program
H91
(0=active; 1=not active)
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
H505
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.
Maximum temperature (°C) of the central heating circuit HC2 of a system with more than one zone,
H507 corresponding to the circuit of the low-temperature zone if the SIEMENS AGU2.500 accessory
is used.
H516 Automatic Summer / Winter switching temperature (°C).
H532 Selection of temperature curve of central heating circuit HC1 (see Graph 1)
H533 Selection of temperature curve of central heating circuit HC2 (see Graph 1)
H608 PWM (%) Setting: Ignition load
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)
H545 Burner operating pause time between two start-ups (s)
Hydraulic system setting (see instructions provided with the SIEMENS AGU2.500 accessory)
H552 H552 = 50 with AGU2.500 and with QAA73 + zones with room thermostat
H552 = 80 with RVA 47
Configuration of heating circuits
H553
H553 = 12 with AGU2.500
H615 Programmable function:
Configuration of system with supplementary pump
H632 = 00001111 with AGU2.500 and with QAA73 + zones with room thermostat
H632 = 00001111 with RVA 47
H632
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
H641 Fan overrun time setting (s)
Setpoint of autonomous ANTILEGIONELLA function
H657
60...80 °C = setting temperature range
0 = function inactive
If the electronic circuit board is replaced, make sure that the parameters set are those specific to the boiler
model, as indicated in the documentation available from the authorised Service Centre.
ISTRUCTIONS PERTAINING TO THE INSTALLER
102
Factory setting
10
1
80
80
20
15
15
See
table 2
3
180
2
21
9
00001100
10
0
910.001.1 - EN