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i.)
current boiler temperatures
When the controller display is in level_1, the temperature display mode is selected by scrolling the mode by pressing button S until 'S' flashes on
digit of the display. The sensor number is selected by pressing button S3. The temperature sensors used in the boiler are listed in table 10.1.
The sensor number is displayed by alternatively flashing 'S' and number (1...5) on digit of the display. The current temperature reading
corresponding to the selected sensor is displayed on digits 3 and 4 of the display. If the sensor selected is faulty, then 'En' is displayed on digits 3
& 4 where 'n' is the error type as shown in table 10.1.
Table 10 : 1 Description of Temperature Sensors
Sensor
S1
S
S3
S4
S5
ii.)
control set points
When the controller display is in level_1, the temperature control set point mode is selected by scrolling the mode by pressing button
S until 'P' flashes on digit of the display. The required set point is selected by pressing button S3. The control set points available for
display are listed in table 10..
The selected control set point is displayed by alternatively flashing 'P' and number (1...9) on digit of the display. The corresponding
set point is displayed on digits 3 and 4 of the display.
Table 10 : 2 Temperature & Pressure control Set Points
Number
P1
Boiler thermostat off setting - CH
P
Boiler thermostat off setting - HW
P3
Boiler thermostat differential
P4
Hot water outlet temperature
P5
P6
P7
iii.) DHW flow rates
When the controller display is in level_1, the DHW flow rate interrogation mode is selected by scrolling the mode by pressing button
S until 'L' flashes on digit of the display. The required set point is selected by pressing button S3. The hot water flow rate information
that can be displayed is shown in table 10.3.
The selected hot water flow information is displayed by alternatively flashing 'L' and number (1...) on digit of the display. The
corresponding set point is displayed on digits 3 and 4 of the display.
Table 10 : 3 Domestic Hot Water Flow rate Display Data
Number
L1
Current DHW flow rate (1/min)
L
Minimum boiler on DHW flow rate
L3
Minimum boiler off DHW flow rate
Description
Boiler flow temperature
Flue gas temperature
DHW flow temperature
Boiler return temperature
Appliance ID resistor
Description
CH temperature return
Low pressure limit
High pressure limit
Description
Error codes
E1 : sensor or cable shorted
E : sensor or cable open circuit
E3 : reading > 99
o
C
Default value
range
75
C
55 - 80
o
o
8
o
C
10
C
o
50
o
C
50 - 60
o
60
o
C
40 - 65
o
0.5 bar
3.0 bar
Default value
n/a
.5 1/min
.0 1/min
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C
C
C
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