Vacuum Drying; Charging Refrigerant; Important Information Regarding The Refrigerant Used; Precautions And General Guidelines - Rotex RRLQ011CAV3 Manuel D'installation

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.
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 1 to
3 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" on
page 14).
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.
12. C
HARGING 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
(1)
GWP value: 1975
(1)
GWP = global warming potential
Please fill in with indelible ink,
■ ➀ the factory refrigerant charge of the product,
■ ➁ the additional refrigerant amount charged in the field and
■ ➀+➁ 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).
6 5
National implementation of EU regulation on certain
fluorinated greenhouse gases may require to provide the
appropriate official national language on the unit.
Therefore, an additional
greenhouse gases label is supplied with the unit.
Sticking instructions are illustrated on the backside of that
label.
Installation manual
14
1 Factory refrigerant
4
charge of the product:
see unit name plate
1
2 Additional refrigerant
amount charged in the
2
field
3 Total refrigerant charge
3 4 Contains fluorinated
greenhouse gases
covered by the Kyoto
Protocol
5 Outdoor unit
6 Refrigerant cylinder and
manifold for charging
multilingual fluorinated
To avoid compressor breakdown. Do not charge the refrigerant
more than the specified amount.
■
This outdoor unit is factory charged with refrigerant and
depending on pipe sizes and pipe lengths some systems require
additional charging of refrigerant. See "12.3. Calculating the
additional refrigerant charge for RRLQ models" on page 14.
■
In case re-charge is required, refer to "12.4. Complete
recharging" on page 15.

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
page 13).
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.
■
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.
Filling using a cylinder
with a siphon attached
Charge the liquid refrigerant
with the cylinder in upright
position.
12.3. Calculating the additional refrigerant charge for
RRLQ models
NOTICE
Piping length is the one way length of liquid piping.
It is not necessary to charge additionally if the piping length is under
10 m.
If the piping length is over 10 m please determine the additional
amount of refrigerant to be charged using the formula below.
R=(total length (m) of liquid piping – 10 m) x 0.054
R=additional charge (kg)(rounded in units of 0.1 kg)
Filling using a cylinder
without a siphon attached
Charge the liquid refrigerant
with the cylinder in up-side-
down position.
RRLQ011~016CAV3+W1
Outdoor unit for air to water heat pump
4PW57794-1 – 10.2010