System Control - ACVMax: 660Y2800 • C
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APPLIANCE DESCRIPTION AND OPERATION
CH & DHW Settings / DHW settings (Cont’d)
DHW Settings
DHW Boiler Setpoint
75°C
DHW Setpoint
60°C
DHW on Differential
3°C
DHW Storage Adder
15°C
DHW Post Pump Time
5 min
DHW Priority Timeout
Off
DHW Settings
DHW Setpoint
60°C
DHW on Differential
3°C
DHW Storage Adder
15°C
DHW Post Pump Time
5 min
DHW Priority Timeout
Off
DHW Priority
Enabled
DHW Priority
Enabled
Disabled
DHW Priority
allows the domestic hot water priority function to be enabled and disabled.
Press the
UP
or
DOWN
buttons to select Enabled or Disabled then press the
OK
button
to store the setting.
•
Enabled
- Domestic hot water calls will have priority over a central heating call. The boiler setpoint
will be set to the domestic hot water setpoint during a domestic hot water call. The DHW circulator
will be enabled and the heating circulators will be disabled during a domestic hot water call.
•
Disabled
- Domestic hot water calls will not have priority over a central heating call. The boiler
setpoint will be set to the domestic hot water setpoint when only a domestic hot water call is
present. The boiler setpoint will be set to the highest setpoint when simultaneous domestic
hot water and central heating calls are present. The DHW circulator will be enabled during a
domestic hot water call. The heating circulators will be enabled during a central heating call.
Default: Enabled
DHW Settings
DHW on Differential
3°C
DHW Storage Adder
15°C
DHW Post Pump Time
5 min
DHW Priority Timeout
Off
DHW Priority
Enabled
DHW Call Blocking
0 min
DHW Call
Blocking
0 min.
0 min.
30 min.
DHW Call Blocking
sets the minimum time between burner firings for domestic hot water calls.
At the completion of a burner firing, the DHW Call Blocking time will begin. The burner will not
fire again until after the DHW Call Blocking time has elapsed. The DHW Call Blocking time only
prevents the burner from firing, the domestic hot water circulator will respond to a domestic hot
water call. This blocking time has no affect on central heating calls. The DHW Call Blocking feature
prevents short cycling of the burner and extends the life of the burner components.
Press the
LEFT
or
RIGHT
button to adjust the DHW Call Blocking time then press the
OK
button to store the setting.
Default: 0 min
.
Simultaneous domestic hot water and central heating calls will result in the PRESTIGE
operating at the highest target temperature when DHW Priority is set to disabled. The
use of a mixing device on the lower temperature zones may be required to protect
the lower temperature zones from damage
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 to CH
Call Blocking
1 min.
0 min.
30 min.
DHW To CH Call Blocking
sets the minimum time between a DHW burner firing and a CH burn-
er firing. At the completion of a DHW burner firing, the 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. 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 domes-
tic hot water call to a 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.
