andrews SH60, Руководство пользователя

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Hydraulic connection
Hydraulic resistance
∆ T-measurement
∆ p-measurement
Water flow data
15
Hydraulic resistance
The hydraulic resistance depends on
the flow rate through the boiler and the
boiler type. In the graph the resistance
for a specific flow rate can be found.
The R600 is able to control a speed
controlled pump via a 0-10VDC signal.
It makes the flow rate modulate in pa-
rallel with the burner load. The mini-
mum flow rate, to which the pump is
allowed to modulate with the burner
load, is 30% of the nominal flow rate
through the boiler.
The flow rate through the boiler can
also be checked by calculation. This
can be done with a
∆ T as well as a ∆ p
measurement.
1.0
10.0
100.0
1.0 10.0 100.0
[m3/h]
[k
P
a]
R
60
4-
R
60
7
R
60
1-
R
60
3
∆ T-measurement
Check the temperature difference over
the boiler (
∆ T flow-return) when the
boiler is running on 100% load. The
nominal
∆ T is 20K and must be at least
between 15K and 25K for secure boiler
operation. An indication of the actual
flow rate can be found with the follow-
ing calculation (see table below for
nominal data):
∆ p-measurement
Check the pressure difference over the
boiler (
∆ p flow-return) when the boiler
pump is running (burner on is not re-
quired). The nominal
∆ p for each boiler
type can be found in the table below,
actual
∆ p must be within:
0.35* ∆ p
nom
≤ ∆ p ≤ 1.75* ∆ p
nom.
An indi-
cation of the actual flow rate can be
found with the following calculation (see
table below for nominal data):
Water flow data
R601 R602 R603 R604 R605 R606 R607
Nominal flow rate m
3
/h 6,1 8,1 10,2 12,2 16,3 20,4 23,1
∆ T at nominal flow rate K 20
∆ p at nominal flow rate kPa 10 18 28 15 27 42 55
q
actual
= ( ∆ T
nominal
/ ∆ T
measured
) * q
nominal
[m
3
/h]
q
actual
= √ ( ∆ p
measured
/ ∆ p
nominal
) * q
nominal
[m
3
/h]