Installation manual
13
RZQG71~140L + RZQSG100~Y1B(9)
Split system air conditioners
4P327537-1 – 2012.08
11.4. Vacuum drying
To remove all moisture from the system, proceed as follows:
1
Evacuate the system for at least 2 hours to a target vacuum of –
100.7 kPa (= –1.007 bar).
2
Check that, with the vacuum pump turned off, the target vacuum
is maintained for at least 1 hour.
3
Should you fail to reach the target vacuum within 2 hours or
maintain the vacuum for 1 hour, the system may contain too
much moisture.
4
In that case, break the vacuum by pressurizing with nitrogen gas
to a gauge pressure of 0.05 MPa (0.5 bar) and repeat steps
to
until all moisture has been removed.
5
The stop valves can now be opened, and/or additional
refrigerant can be charged (see
12. Charging refrigerant
12.1. Important information regarding the refrigerant
used
This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol. Do not vent gases into the atmosphere.
Refrigerant type:
R410A
GWP(1) value:
1975
(1)
GWP = global warming potential
Please fill in with indelible ink,
the factory refrigerant charge of the product,
the additional refrigerant amount charged in the field and
+
the total refrigerant charge
on the fluorinated greenhouse gases label supplied with the product.
The filled out label must be adhered on the inside of the product and
in the proximity of the product charging port (e.g. on the inside of the
service cover).
To avoid compressor breakdown, do not charge the refrigerant
more than the specified amount.
12.2. Precautions and general guidelines
When servicing the unit requires the refrigerant system to be
opened, treatment and evacuation of refrigerant must be done in
accordance with applicable legislation.
Refrigerant can not be charged until field wiring has been
completed.
Refrigerant may only be charged after performing the leak test
and vacuum drying (see
"11. Leak test and vacuum drying" on
).
This unit requires additional charging of refrigerant according to
the length of refrigerant piping connected at the site.
Make sure to charge the refrigerant in liquid state to the liquid
pipe. Since R410A is a mixed refrigerant, its composition
changes if charged in its gaseous state and normal system
operation would then no longer be assured.
Before charging, check whether the refrigerant cylinder has a
syphon attached or not and position the cylinder accordingly.
On this model it is not necessary to charge additionally if the piping
length
≤
30 m.
For RZQG units only:
If the piping length <5 m: See
"12.5. Total charging weight of the
refrigerant (after a leak, etc.)" on page 15
.
INFORMATION
After opening the stop valve, it is possible that the pressure
in the refrigerant piping does not rise. 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.
1
2
4
3
6
5
1
factory refrigerant charge
of the product:
see unit name plate
2
additional refrigerant
amount charged in the field
3
total refrigerant charge
4
Contains fluorinated
greenhouse gases covered
by the Kyoto Protocol
5
outdoor unit
6
refrigerant cylinder and
manifold for charging
CAUTION
When charging a system, care shall be taken that its
maximum permissible charge is never exceeded, in view of
the danger of liquid hammer.
WARNING
Refrigerant cylinders shall be opened slowly.
Always use protective gloves and protect your eyes
when charging refrigerant.
DANGER
When the power is on, please close the front panel
when leaving the unit unattended.
Charging with an unsuitable substance may cause
explosions and accidents, so always ensure that the
appropriate refrigerant (R410A) is charged.
Filling using a cylinder
with a siphon attached
Charge the liquid
refrigerant with the
cylinder in upright
position.
Filling using a cylinder
without a siphon
attached
Charge the liquid
refrigerant with the
cylinder in up-side-down
position.
