13 Disposal
Installer reference guide
82
EPGA11~ EAVH/9W
Daikin Altherma – Low temperature split
4P556070-1 – 2019.02
Activating the vacuum mode is done by operating the BS1 push
button on the PCB (A1P). Operate the switches and push buttons
with an insulated stick (such as a closed ball-point pen) to avoid
touching of live parts.
When the unit is powered on and not running, push the BS1 push
button 3 times within a time frame of 10 seconds to activate vacuum
mode.
To deactivate vacuum mode:
After vacuuming the unit, please deactivate the vacuum mode by
pushing the BS1 push button 3 times within a time frame of 10
seconds.
Make sure to reattach the electronic component box cover and to
install the front cover after the job is finished.
NOTICE
Make sure that all outside panels, except for the service
cover on the electrical component box, are closed while
working.
Close the lid of the electrical component box firmly before
turning on the power.
13.4
To perform vacuum drying
NOTICE
▪ Connect the vacuum pump to
both
the service port of
the gas stop valve and the service port of the liquid
stop valve to increase efficiency.
▪ Make sure that the gas stop valve and liquid stop valve
are firmly closed before performing the leak test or
vacuum drying.
1
Vacuum the system until the pressure on the manifold indicates
−0.1 MPa (−1 bar).
2
Leave as is for 4-5 minutes and check the pressure:
If the pressure…
Then…
Does not change
There is no moisture in the
system. This procedure is
finished.
Increases
There is moisture in the
system. Go to the next step.
3
Vacuum the system for at least 2 hours to a manifold pressure
of −0.1 MPa (−1 bar).
4
After turning the pump OFF, check the pressure for at least
1 hour.
5
If you do NOT reach the target vacuum or CANNOT maintain
the vacuum for 1 hour, do the following:
▪ Check for leaks again.
▪ Perform vacuum drying again.
INFORMATION
After opening the stop valve, it is possible that the pressure
in the refrigerant piping does NOT increase. This might be
caused by e.g. the closed state of the expansion valve in
the outdoor unit circuit, but does NOT present any problem
for correct operation of the unit.
NOTICE
Make sure to open the stop valves after performing
vacuum drying. Running the system with the stop valves
closed may break the compressor.
13.5
Using the stop valve and service
port
13.5.1
To handle the stop valve
Take the following guidelines into account:
▪ The stop valves are factory closed.
▪ The following figure shows the stop valve parts required when
handling the valve.
c
d
a
b
a
Service port and service port cap
b
Valve stem
c
Field piping connection
d
Stem cap
▪ Keep both stop valves open during operation.
▪ Do NOT apply excessive force to the valve stem. Doing so may
break the valve body.
▪ ALWAYS make sure to secure the stop valve with a spanner, then
loosen or tighten the flare nut with a torque wrench. Do NOT place
the spanner on the stem cap, as this could cause a refrigerant
leak.
a
b
a
Spanner
b
Torque wrench
▪ When it is expected that the operating pressure will be low (e.g.
when cooling will be performed while the outside air temperature
is low), sufficiently seal the flare nut in the stop valve on the gas
line with silicon sealant to prevent freezing.
Silicon sealant; make sure there is no gap.
13.5.2
To open/close the stop valve
1
Remove the stop valve cover.
2
Insert a hexagon wrench (liquid side: 4 mm, gas side: 4 mm)
into the valve stem and turn the valve stem:
Counterclockwise to open.
Clockwise to close.
3
When the stop valve CANNOT be turned any further, stop
turning.
Result:
The valve is now open/closed.
Summary of Contents for Altherma EAVX-D9WG
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