Configuring The Anti-Legionella Function - Baxi MK SYSTEM Installation, User And Service Manual

Tab.18 Configuration D
Value of the pa­ Value of the BL1
rameter contact config pa­
OTH LogicLev rameter
contact AP098
CP640
Open Open
Open Open
8.11

Configuring the anti-legionella function

Access path
> Installer > Installation setup > Domestic Hot Water > Backup
Parameter
DHW management
DP051
Access path
> Installer > Installation setup > Domestic Hot Water > Anti-legionella
Parameter
Anti-legionella
DP004
Parameter
DHW AntiLeg Setpoint
DP160
Parameter
DHW anti-leg runtime
DP410
7856310 - v02 - 21122023
The multifunction
input BL1 is:
Open
Closed
The anti-legionella function is used to bring the water in the DHW cylinder
to a temperature above the normal setpoint to eliminate Legionella
bacteria. This function is disabled upon delivery.
To guarantee the efficiency of the anti-legionella programme, the heating
element or the backup boiler (depending on the installation) must be able
to take over from the heat pump to achieve the requested setpoint
temperature.
1. Follow the access path described below to access the domestic hot
water management parameters.
2. Activate triggering of the backups.
Description
Management of the operating mode for the heat pump.
To guarantee the effectiveness of the anti-legionella pro­
gramme, the immersion heater or the backup boiler must be
able to take over from the heat pump to allow the setpoint
temperature DHW AntiLeg Setpoint (DP160) to be reached
3. Follow the access path described below to access the parameters for
setting the anti-legionella function. Adapt the parameters for the anti-
legionella function based on the recommendations applicable in your
country.
4. Activate the anti-legionella function.
Description
Function to protect the DHW cylinder against Legionella bac­
teria.
5. Adjust the setpoint temperature.
Description
Setpoint temperature for the anti-legionella function.
6. Adjust the duration of the anti-legionella programme cycle.
Description
Duration for maintaining the setpoint temperature.
Duration for which the setpoint temperature can be maintained
to ensure Legionella bacteria are eliminated.
Operating mode for If the OT contact is
the heat pump open
Heating Heating demand
Cooling Cooling demand
8 Settings
If the OT contact is
closed
No heating demand
No cooling demand
Adjustment required
Auto (HP + Boiler)
Adjustment required
Weekly
or
Daily
Adjustment required
Can be set from 60 °C to 75
°C
Adjustment required
Can be set from 0 Min to 360
Min
35