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System Control - ACVMax: 660Y2800 • C
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APPLIANCE DESCRIPTION AND OPERATION
CH & DHW Settings / DHW settings (Cont’d)
DHW Settings
DHW Storage Adder
15°C
DHW Post Pump Time
5 min
DHW Priority Timeout
Off
DHW Priority
Enabled
DHW Call Blocking
0 min
DHW to CH Call Blocking
1 min
DHW Settings
DHW Post Pump Time
5 min
DHW Priority Timeout
Off
DHW Priority
Enabled
DHW Call Blocking
0 min
DHW to CH Call Blocking
1 min
Antilegionella Function
Enabled
Antilegionella Function
Enabled
Disabled
The
Antilegionella Function
ensures that an Indirect Water Heater is heated at least once
per week to prevent the growth of Legionella bacteria.
Press the
UP
or
DOWN
buttons to select Enabled or Disabled then press the
OK
button to
store the setting.
•
Enabled
- When the
Thermostat
option is chosen in Demand Type, a domestic hot
water call is generated for 15 minutes once per week to heat the Indirect Water Heater.
When the
Sensor
option is chosen in Demand Type, a domestic hot water call
is generated until the DHW storage temperature reaches 60°C once per week.
When the Sensor option is chosen in Demand Type, the weekly timer is reset
whenever the DHW storage temperature reaches 60°C to prevent unnecessary fir-
ings. This function will be active even if DHW Operation has been set to Disabled.
The boiler setpoint is at 80°C during the antilegionella cycle.
•
Disabled
- The Prestige will only fire in DHW mode when a domestic hot water call is
received.
Default: Enabled
The antilegionella function should only be enabled when an Indirect Water Heater is
installed. Enabling the antilegionella function without an Indirect Water Heater will
result in the Prestige firing once per week in DHW mode. This could cause a Manual
Reset Hard Lockout of the boiler.
The antilegionella function is most effective when the Sensor option is chosen in
DHW demand. The use of an Indirect Water Heater Sensor ensures that the domestic
hot water is heated to 60°c at least once per week.