Benchmark Alpha E-Tec Plus 28 Installation And Servicing Instruction page 35

ID Parameter
S0 DHW minimum no.
of fan revs
S1 DHW maximum no.
of fan revs
S2 Ignition phase no.
of fan revs
ID Parameter
P0
Max. DHW
output
P1
Min. CH output
P2
Max. CH output
P3 Relay configuration
Boiler terminals
5 and 6 used for
external devices
5 = L, 6 = N
(230V ac)
P4 Pump functioning
P5
External sensor
P6
Service reminder
timer
(See error code Sr,
Section 10.1)
P7
Remote control
communication
protocol setting
Description
Defines the operating speed of the
fan at minimum DHW output
Defines the operating speed of the
fan at maximum DHW output
Defines the operating speed of the
fan during the ignition phase
Description
Defines the maximum heat output percentage of the boiler
during DHW mode
Defines in percentage the minimum output in central heating
Defines the maximum heat output percentage of the boiler
during the central heating mode compared to the maximum heat
output available
0 - OFF
1 - Main zone control (with Climatic controller)
2 - General alarm
3 - CH phase active (external pump)
4 - External gas valve power supply
5 - Not used on this model
6 - When boiler pump active
7 - Alpha Trace heating cable enabled
8 - Not used
9 - FlowSmart function enabled.
The boiler pump can function in two ways.
0 Intermittent - The pump is controlled according to the heating
request of a room thermostat or remote control
1 Continuous - In 'Winter' mode the pump runs continuously
If the reading of the external sensor is not correct it is possible to
adjust the reading to correlate with the true outside value
Time in months after which 'Sr' (service reminder) is displayed
0 - Off (timer disabled)
1-36 - Timer enabled, months until 'Sr' service reminder
message displayed
Note: The service counter (when activated) will only count down
when the boiler is connected to a live power supply
Section of the remote control communication protocol
0 - Alpha Climatic
1 - OpenTherm type remote control - Boiler terminal block link 1
to 2 must be present
Range
E-Tec Plus 28 E-Tec Plus 33
NG = 27
20 - 60
LPG = 26
(X 50 RPM)
NG = 121
S0 - 140
LPG = 115
(X 50 RPM)
56
40 - 80
(X 50 RPM)
Alpha E-Tec Plus 28, 33 and 38 - Commissioning
Default
E-Tec Plus 33
NG = 28 NG = 27
LPG = 28 LPG = 28
NG = 128 NG = 122
LPG = 121 LPG = 117
56 56
Range Default
0 - 100 % 100 %
0 - P2 0 %
E-Tec Plus 28
0 - 100 %
NG - 85
LPG - 82
E-Tec Plus 33
NG - 85
LPG - 85
E-Tec Plus 38
NG - 80
LPG - 82
0 - 9 3
0 - 1 0
-9 +9 K 0
0 - 36 0
0 - 1 0
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