33
Alpha InTec² 25XE and 28XE - Commissioning
Parameter Feature Description Range
20 - 50 °C
(t0 + 5) + 85 °C
0 - 3
0 - 30 seconds
0 - 100 seconds
(10 sec steps)
0 - 600 seconds
(10 sec steps)
0 - 840 seconds
(10 sec steps)
0 - 600 seconds
(10 sec steps)
0 - 2
0 - 1
0 - 4
-
Set 2
1 - 9
1 - A3
Set 0
0 - 2
-
Defines the minimum flow temperature set point
Defines the maximum flow temperature set point
Establishes the switch-off method in DHW mode at flow rates
below the minimum modulation level
1 and 3 correlated - The boiler switches off according to
the temperature set (this will cause cycling at low flow rate
conditions)
0 and 2 fixed - The switch-off temperature is fixed at the
maximum (65 °C) value regardless of the value set on the control
panel
The boiler is set to switch-on immediately with a request for DHW.
If a solar or other renewable cylinder is connected to pre-feed the
boiler, it is possible to delay firing the boiler in order to allow the
pre-heated water to reach the boiler
This sets a time delay for the boiler to switch back to CH mode
after a hot tap is closed
Adjustable anti-cycling period
Adjustable time period for the burner to ramp up to maximum
output in CH mode
Ignition response adjustment, ie underfloor type systems with
slow acting actuator valves will need a delay to prevent boiler
overheating occurring
Establishes the display lighting mode
0 Automatic - The display lights up during use and dims after 15
secs of inactivity. In the event of an anomaly the display flashes.
1 Low - The display is always lit with low intensity
2 High - The display is always lit with high intensity
'Summer' mode
0 - No information is displayed
1 - DHW active, the display shows the flow temperature
'Winter' mode
0 - The display shows the set value of the CH selector
1 - CH or DHW active, the display shows the flow temperature
and when not active the display shows the set value of the CH
selector
Defines the type of hydraulics in the boiler
0 = Boiler flow switch
1 = Flow meter (not used on this model)
2 = System boiler (not used on this model)
3 = Boost - pre-heat function
4 = Flow meter and boost function
Not used on this boiler model
Defines the type of pump in the boiler
Max. pump speed proportional to heat output
Min. speed setting *Should not be below 5
Defines the pump speed control mode
Defines the length of the flue
0 = < 4.5 m
1 = 4.5 - 9.0 m
2 = > 9.0 m
In the event of an alteration, anomaly 'E72' will be displayed and
fast calibration is required. See Section 5.13.
Not used on this bolier model
CH set point min.
temperature
CH set point max.
temperature
DHW thermostat
Solar delay timing
DHW priority timing
CH ignitions timer
CH ramp timer
CH ignition delay
from controls
request
Display lighting
Display information
Hydraulic model
-
Pump model
Max. pump speed
Min. pump speed
Pump speed control
Equivalent flue
length
-
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
A0
A1
A2
A3
A4
A5
F0
F1
Default
20
85
2
0
2
(20 secs)
18
(180 secs)
18
(180 secs)
0
0
1
0
-
2
9*
5*
0
0
-
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