Alpha E-Tec Plus 28NX - Page 43

Alpha E-Tec Plus 28NX, 33NX and 38NX - Commissioning
(20 - 50)
(25 - 85)
0 - 2
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 - 2
0 - 100
0 - 100
10 - (t.13 - 5)
(t.12 + 5) - 65
0 - 15
0 - 15
t.0
t.1
t.2
t.3
t.4
t.5
t.6
t.7
t.8
t.9
t.10
t.11
t.12
t.13
t.14
t.15
20
85
0
0
2
(20 sec)
18
(180 sec)
18
(180 sec)
0
0
2
20
100
30
60
5
5
ID
Parameter Description Range Default
Customised
value
Set minimum flow temperature
Set maximum flow temperature
0 - Always off
1 - Always on
2 - Auto
The boiler is set to switch on immediately after a DHW
demand.
In the case of combination with a solar storage tank located
upstream of the boiler, it is possible to compensate for the
distance between the storage tank and the boiler to allow hot
water to reach the boiler.
Set the time required to check that the water is sufficiently hot
(see Section 6.20)
In winter mode, the boiler at the end of a domestic hot water
demand is set to switch operation to space heating mode if
there is an active demand.
This timing defines a time during which the boiler waits before
changing operation mode in order to quickly and comfortably
meet any further domestic hot water heating demand.
The boiler has an electronic timer, which prevents the burner
from igniting too often in central heating mode.
In central heating mode, the boiler performs an ignition ramp
in order to reach the maximum output set.
The boiler is set to switch on immediately after a request.
In the event of particular systems (e.g. area systems with
motorised thermostatic valve etc.) it may be necessary to
delay ignition.
Establishes the display lighting mode:
0 - The display lights up during use and dims after 15 seconds
of inactivity. In the event of an anomaly the display flashes
1 - The display is always lit with low intensity
2 - The display is always lit with high intensity
See following table - Main display based on parameter t.9
Backlight brightness in low mode in %
Buzzer noise level in %
Set minimum DHW set limit available to user
Set maximum DHW set limit available to user
Where optional system flow sensor is fitted (P.15 = 2) max.
increase to HF temperature over setpoint
Where optional system flow sensor fitted (P.15 = 2), during
the boiler ignition (first 60 seconds) the HF off temperature is
increased of the value set. To avoid cycling
CH set point min.
temperature
CH set point max.
temperature
Boost mode
DHW pre-heat
Solar delay timing
DHW priority timing
CH ignition timer
Heating ramp timing
CH ignition delay
from room
thermostat request
Display lighting
Display
Low lighting level
Buzzer sound level
DHW set point min.
temperature
DHW set point max.
temperature
Max. increase in HF
temperature
HF temperature
anti-cycling offset
43