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Manual ENA 7-30
31
30
ENG
Error list
Shows the last acknowledged 250 errors together with time and date.
Value statistics
Display of various statistic data.
Refill statistics
Display of the last 200 make-up operations together with date, time and duration of the make-up
operations and the number of litres supplied (if a pulse water meter is used). The number of supplied
litres displayed may be zero, although water has been fed into the system, if the makeup quantity was
smaller than the pulse rate of the pulse water meter. Similarly, the actual quantity of water supplied
may be smaller than the value registered by the pulse water meter.
Change entry code
Change to another access code. For the operator, only code 000001 is possible and required.
Appendix 4. Examples
4.1. ENA 7-30 with NFE1.1 and a diaphragm expansion vessel in a heating system
Do not use nominal bores smaller
than indicated for the lenghts
of the lines concerned! The lines
should be as short as possible!
DN20 < 10 m
DN25 < 20 m
DN32 < 30 m
4.2. ENA 7-30 with NFE1.2 and a compressor controlled pressure level in a heating system
Do not use nominal bores smaller than indicated for
the lenghts
of the lines concerned! The lines should be as short as
possible!
DN20 < 10 m
DN25 < 20 m
DN32 < 30 m
NFE1.1
0 0 0
Σ
m3
SCU
>1000 mm
A
B
C
D
E
F
Rp3/4"
Rp3/4"
Rp3/4"
ENA 7-30
A
Heater
B
Diaphragm expansion vessel
C
ENA 7-30
D
Waste water (Drain)
E
Make-up water inlet
F
NFE 1.1
F
E
D
C
A
ENA 7-30
SCU
3
m
Σ
0 0 0
NFE1.2
SCU
B
Rp3/4"
Rp3/4"
Rp3/4"
>1000 mm
A
Heater
B
Diaphragm expansion vessel
C
ENA 7-30
D
Waste water (Drain)
E
Make-up water inlet
F
NFE 1.2
