Warmup WHS-M-S3-Series Installation Manual page 21

Step 4 -
Pressure Testing
7
15
10
190 260
120
5
45
0
psi
bar
0
• Reduce the pressure to 2
bar. Hold this pressure for
60 minutes and continue to
40
30 50
90 110
20 60
130
70
inspect.
150
50
10 70
170
32
°F
0 °C 80
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;
Pressurise the system to its
previous test pressure and
isolate all circuits using their
flow and return valves.
Is a pressure drop still
There is a leak on the
manifold assembly. Check all
fittings, remake as necessary.
NOTE: If a repair kit is used, ensure to record its location in the
commissioning log.
20
60
320
25
420
435
30
persisting?
YES
If you are still experiencing
problems, please contact
8
• Safely depressurise the system,
record the results in the
Commissioning Log.
There may be a leak on one or
more of the secondary circuits
Open each circuits flow
NO
If the pressure drops as the
valve is opened, then a leak
is present on the associated
If a leak is identified,
• Safely de-pressurise the
system
• Isolate the leaking
circuit
• Locate and repair the
leak
• Repeat the pressure test
Warmup
40
30 50
90 110
20 130 60
70
150
50
10 70
170
32
0 °F 80
°C
valve in turn.
circuit.
21