Alpha InTec2 20SE Installation And Servicing Instruction page 33

Parameter Feature
T0
CH set point min.
temperature
T1
CH set point max.
temperature
T2 DHW thermostat
T3
-
T4
-
T5 CH ignitions timer
T6
CH ramp timer
T7
CH ignition delay
from controls
request
T8 Display lighting
T9 Display information
A0 Hydraulic model
A1 -
A2 Pump model
A3
Max. pump speed
A4
Min. pump speed
A5 Automatic pump
speed control
F0 Equivalent flue
length
F1
-
Description
Defines the minimum flow temperature set point
Defines the maximum flow temperature set point
Establishes the switch-off method in DHW mode (if Alpha diverter
valve kit fitted) depending on the cylinder temperature
0 Cylinder heating on
Cylinder temp. = set point temp - 3°C
Cylinder heating off
Cylinder temp = set point temp
1 Cylinder heating on
Cylinder temp = set point temp - 2°C
Cylinder heating off
Cylinder = set point temp + 1°C
2 Cylinder heating on
Cylinder temp = set point - 10°C
Cylinder heating off
Cylinder temp = set point temp
3 Cylinder heating on
Cylinder temp = set point temp - 5°C
Cylinder heating off
Cylinder temp = set point temp
2 - 3 are recommended with solar cylinder
Not used on this boiler model
Not used on this boiler model
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 (not used on this model)
1 = Flow meter (not used on this model)
2 = System boiler
3 = Boost - pre-heat function (not used on this model)
4 = Flow meter and boost function (not used on this model)
Not used on this boiler model
Defines the type of pump in the boiler
Max. pump speed
Min. speed setting *Should not be below 5
Defines the automatic pump speed control mode (see Section 2.4)
ΔT = 0°C, pump head proportional to
0 PROPORTIONAL -
heat output
5 - 25 CONSTANT ΔT - ΔT = 5 - 25°C, the pump speed is
controlled automatically to keep a
constant ΔT between heating flow and
return.
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
Alpha InTec² 20SE and 30SE - Commissioning
Range Default
20 - 50 °C
20
(t0 + 5) + 85 °C
85
0 - 3
2
-
-
-
-
0 - 600 seconds
18
(10 sec steps)
(180 secs)
0 - 840 seconds
18
(10 sec steps)
(180 secs)
0 - 600 seconds
0
(10 sec steps)
0 - 2
0
0 - 1
1
0 - 4
2
-
-
Set 3
3
1 - 9
9*
1 - A3
5*
0 - 25
15
0 - 2
0
-
-
33