21
If a pressure loss is observed
If a pressure loss is observed at any point during the pressure test, the
test must be stopped and the system must be checked to establish
the cause. Use the guide below to assist;
-K
v-
01
3
10
6
1
20
°C
0
10
20
30
40
50
80
70
60
°F
32
50
70
90
110
130
150
170
-K
v-
01
3
10
6
1
20
°C
0
10
20
30
40
50
80
70
60
°F
32
50
70
90
110
130
150
170
0
5
10
15
30
25
20
0
psi
bar
45
120
190
260
320
435
420
0
5
10
15
30
25
20
0
psi
bar
45
120
190
260
320
435
420
60
0
5
10
15
30
25
20
0
psi
bar
45
120
190
260
320
435
420
45
15
0
5
10
15
30
25
20
0
psi
bar
45
120
190
260
320
435
420
•
Safely depressurise the system,
record the results in the
Commissioning Log.
•
Reduce the pressure to 2
bar. Hold this pressure for
60 minutes and continue to
inspect.
7
8
Pressurise the system to its
previous test pressure and
isolate all circuits using their
flow and return valves.
Is a pressure drop still
persisting?
There may be a leak on one or
more of the secondary circuits
Open each circuits flow
valve in turn.
If the pressure drops as the
valve is opened, then a leak
is present on the associated
circuit.
If a leak is identified,
•
Safely de-pressurise the
system
•
Isolate the leaking
circuit
•
Locate and repair the
leak
•
Repeat the pressure test
NO
There is a leak on the
manifold assembly. Check all
fittings, remake as necessary.
YES
If you are still experiencing
problems, please contact
Warmup
NOTE:
If a repair kit is used, ensure to record its location in the
commissioning log.
Step 4 -
Pressure Testing
Содержание WHS-M-S3-Series
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Страница 33: ...33 NOTE Draw a plan showing the layout and location of the heating circuits Layout Plan ...