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ID
Parameter
t0
CH set point
minimum
t1
CH set point
maximum
t2
Solar delay timing
t3
DHW priority timing
t4
CH ignition timer
t5
CH ramp timer
t6
CH ignition delay
from TA and CR
request
t7
Display lighting
t8
Display
t9
CH flow off offset
A0
DHW hydraulic
selection
A1
Max. pump speed
A2
Min. pump speed
A3
Pump operating
mode
A4
-
A5
-
A6
DHW thermostat
36
Alpha E-Tec Plus 28, 33 and 38 - Commissioning
Description
Defines the minimum flow temperature
Defines the maximum flow temperature
The boiler is set to switch-on immediately after a request for
DHW. If a solar or other pre-heated supply is connected to the
boiler, it is possible to delay the boiler firing in order to allow the
pre-heated supply to reach the boiler. Set the time according to
the desired delay for this function.
At the end of a domestic hot water request the boiler will switch
to central heating mode if there is a request. It is possible to set
a time delay in which the boiler waits before changing back to
heating mode in order to quickly satisfy a request for domestic
hot water again.
The boiler has electronic timing, which prevents the burner from
cycling too often in central heating mode
In central heating mode the boiler performs a timed ramp up in
order to reach the maximum output set
The boiler is set to switch-on immediately after a request. For
zoned or complex systems with motorised and thermostatic
valves it may be necessary to delay ignition to prevent
overheating
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
LCD display setting
'Summer' mode
0 - The display is always off
1 - Displays the flow temperature during operation and off when
no request
'Winter' mode
0 - The display shows the set value of the CH selector
1 - The display shows the flow temperature during operation and
the set value with no request
The switch-off temperature of the flow is increased by the set
value during the first 60 seconds of a central heating request to
overcome any residual heat in the boiler
Defines the type of DHW hydraulics in the boiler
0 - Instant
1 - Not used on this model
Defines the maximum operating speed of the pump (if A1 = A2
pump is operating at set speed)
Defines the minimum operating speed of the pump
Sets the pump operating mode
)T = 0: proportional head (see Section 3.5)
)T = 5 - 25K: )T constant (see Section 3.5)
Not used on this model
Not used on this model
Establishes the switch-off method in DHW mode when the flow
rate is below the minimum output available
0 Fixed - The switch-off temperature is fixed at the maximum
value regardless of the value set on the control panel
1 Corrolated - The boiler switches off according to the
temperature
Range
Default
20 - 50 °C
25
(t0 + 5) - 85 °C
85
0 - 30 seconds
0
0 - 100 seconds
2
(10 sec steps)
(20 sec)
0 - 600 seconds
18
(10 sec steps)
(180 sec)
0 - 840 seconds
18
(10 sec steps)
(180 sec)
0 - 600 seconds
0
(10 sec steps)
0 - 2
0
0 - 1
1
0 - 15°C
0
0 - 1
0
A2 - 9
9
1 - A1
E-Tec Plus 28=6
E-Tec Plus 33=5
E-Tec Plus 38=5
0 - 25
15
-
-
-
-
0 - 1
0
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