ACV Prestige 24 Solo Installer's Handbook page 19

ACVMAX DESCRIPTION AND OPERATION
DHW Setting
DHW Setting
DHW Storage Adder 15°C
DHW Post Pump Time 2 min
DHW Priority Timeout O
0 min.
DHW Priority Enabled
DHW Call Blocking 0 min
DHW to CH Call Blocking 1 min
DHW Setting Antilegionella Function
DHW Post Pump Time 2 min Enabled
DHW Priority Timeout O Disabled
DHW Priority Enabled
DHW Call Blocking 0 min
DHW to CH Call Blocking 1 min
Antilegionella Function Enabled
DHW to CH DHW To CH Call Blocking sets the minimum time between a DHW burner firing and a CH burner firing. At the completion of a DHW burner firing, the
Call Blocking
DHW to CH Call Blocking time will begin. The burner will not fire again for a central heating call until after the DHW To CH Call Blocking time has elapsed.
1 min.
This feature only prevents the burner from firing, the central heating circulators will respond to a central heating call. This blocking time has no affect
on domestic hot water calls. The DHW To CH Call Blocking feature prevents the burner from firing when switching from a domestic hot water call to a
30 min.
central heating call. This allows the remaining heat in the heat exchanger to be dissipated and potentially satisfy the central heating call.
Press the LEFT or RIGHT buttons to adjust the DHW To CH Call Blocking time then press the OK button to store the setting.
Default: 1 min.
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 tem-
perature reaches 60°C to prevent unnecessary firings. This function will be active even if DHW Operation has been set to Disabled.
The appliance setpoint is at 80°C during the antilegionella cycle.
• Disabled - The Appliance 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 Appliance firing once per week in DHW mode. This could cause
a Manual Reset Hard Lockout of the appliance.
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.
The Installer's Handbook - ACVMax: A1004308 - 660Y2900 - Volume 1 • B
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