Bunsen Air - Installer Manual
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P a g e
8
Bunsen Air Testing
Leakage test for Pipe Connection
Once all connections between Bunsen Air and Bunsen
Panels have been done, the installer has to check for the
leakage.
Step 1:
Cover all connections with the soap foam and
see if there is any leakage.
Step 2:
A load of nitrogen at a pressure of 10 bar shall
be injected via pressure tap of 3-way valve.
Step 3:
Hold and monitor the pressure change for 30
minutes, while check whether any of all connections has
leakage.
Step 4:
If there is any pressure drop in 30 minutes, or if
any leakage is found, identify and fix the leakage. Then
conducts the full leak test again until there is no leakage
and pressure remains constant in 30 minutes.
Note
The pressure for the leak test must not be over
10bar in both Bunsen panel and pipe connection.
Caution
Warranty requirement that the Nitrogen pressure
test and vacuum processing test must be
evidenced with a picture, to show the pressure
level injected or the vacuum level respectively.
Vacuum Processing
This is a critical process for the system to be completely
vacuum before loading the refrigerant fluid. The purpose
of this process is to remove all the air and moisture
inside the pipe work and Bunsen panel. If the system is
not completely vacuum, the system will be soon
deteriorated.
Step 1:
Start vacuum process by using a vacuum pump.
Step 2:
Hold the system in vacuum for at least 30
minutes or less than 20pa shown by vacuum manometer.
Step 3:
Make sure no change in the vacuum manometer
for 15 minutes after stopping the vacuum pump.
Step 4:
After the vacuum process, the two valves shall
be opened for the refrigerant to circulate.
Note
Failure of this vacuum process which causes the
system deterioration does not include in the
warranty period.
The use of a thread sealant is recommended for
all existing thread connections.
Caution
For vented system, please adjust the water pump
mode from default I / S1 to III / S3. This action
can enhance the internal pressure to draw air
inside the water pipe.
Standard for vacuum completion: After 10
minutes of system operation, No Unusual Sound
from Compressor, and difference of two
temperatures on the screen not more than 5
degrees.
Additional Refrigerant Charge
The Bunsen Air is pre-charged with 1400g of refrigerant
R134a, sufficient enough for up to 10M of physical
separation pipe length between Bunsen Air and Bunsen
panel.
The pipe-run length can be extended up to 15 meters of
physical separation between Bunsen Air and Bunsen
panel. 20g of refrigerant R134a shall be added for every
extra 1 meter length of pipe.
Note
It is important for connections between Bunsen
Air and Bunsen panel to have as less as bends
as possible, in which the load loss shall be
minimized. Check the additional refrigerant
charge accordingly.
Distance (M)
Addition Charge (g)
5
– 10
No additional charge
11
20
12
40
13
60
14
80
Max 15
Max 100