36
&KHFNZDWHUÀRZ
7KHZDWHUÀRZWKURXJKWKHERLOHUFDQ
be checked with two different me-
thods shown below.
ǻ7PHDVXUHPHQW
Check the temperature difference
RYHUWKHERLOHUǻ7ÀRZUHWXUQZKHQ
the boiler is running on 100% load.
7KHQRPLQDOǻ7LV.DQGPXVWEH
at least between 10K and 20K for se-
cure boiler operation. An indication of
WKHDFWXDOÀRZUDWHFDQEHIRXQGZLWK
the following calculation (see table
EHORZIRUQRPLQDOGDWD
q
actual
ǻ7
nominal
ǻ7
measured
) * q
nominal
[m
3
/h]
ǻSPHDVXUHPHQW
Check the pressure difference over
WKH ERLOHU ǻS ÀRZUHWXUQ ZKHQ WKH
boiler pump is running (burner on
LVQRWUHTXLUHG7KHQRPLQDOǻSIRU
each boiler type can be found in the
WDEOHEHORZDFWXDOǻSPXVWEHZLWKLQ
ǻSQRPǻ3ǻSQRP$QLQ
-
GLFDWLRQRIWKHDFWXDOÀRZUDWHFDQEH
found with the following calculation
VHHWDEOHEHORZIRUQRPLQDOGDWD
q
actual
¥ǻS
measured
ǻS
nominal
) * q
nominal
[m
3
/h]
Commissioning
&KHFNZDWHUÀRZ
:DWHUÀRZGDWD
R40
45 - 50
65
85
100
120
150
1RPLQDOÀRZUDWH
[m3/h]
1.9
2.6
3.4
4.0
5.6
ǻ7DWQRPLQDOÀRZUDWH
[°C]
20
ǻSDWQRPLQDOÀRZUDWH
[kPa]
9
16
29
15
22
34