Setting The Boiler Parameters - Baxi LUNA HT 1.450 Installers And Users Instructions

15. Setting the boiler
IT
parameters
DE
GB
CZ
HU
RO
The boiler parameters may only be modified by professionally qualified staff proceeding as fol-
lows:
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 N. Description
H90
Setting for domestic hot water reduced temperature (°C)
H91 D.H.W. (Domestic Hot Water) program
(0 = enabled; 1 = disabled)
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.
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.
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)
H536
Maximum speed at maximum output in heating mode
(rpm - maximum speed limitation)
H612
Setting value of required speed (rpm) at low-fire
H613 Setting value of required speed (rpm) at high-fire
H544
Pump post-circulation time in central heating mode (min)
H545 Burner operating pause time between two start-ups (s)
H552 Hydraulic system setting (see instructions provided with the SIEMENS AGU2.500
accessory)
H615
Programmable function:
- "0" electricity supply to zone pump / valve and use of the SIEMENS AGU2.500
accessory;
- "1" electricity supply to a remote LPG gas valve;
- "5" electricity supply to zone pump / valve in the absence of the SIEMENS
AGU2.500 accessory.
Only one of these functions can be selected.
H641 Fan post-purge interval (s)
Table 4
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.
87 87
Factory setting
10
1
80
80
20
15
15
Refer to
paragraph 12.1
3
180
34
5
10