15 Electrical installation
Installation and operation manual
26
RK RKXYQ8T7Y1B
VRV IV compressor unit for indoor installation
4P499900-1B – 2021.12
7
Take all the precautions mentioned in
and
36] into account.
8
Turn on the power of the indoor units, compressor unit and heat
exchanger unit.
9
Activate setting [2‑20] to start the manual additional refrigerant
charge mode. For details, see
33].
Result:
The unit will start operation.
INFORMATION
The manual refrigerant charge operation will automatically
stop within 30 minutes. If charging is not completed after
30 minutes, perform the additional refrigerant charging
operation again.
INFORMATION
▪ When a malfunction is detected during the procedure
(e.g., in case of closed stop valve), a malfunction code
will be displayed. In that case, refer to
codes when charging refrigerant"
26] and solve the
malfunction accordingly. Resetting the malfunction can
be done by pushing BS3. You can restart the
"Charging" instructions.
▪ Aborting the manual refrigerant charge is possible by
pushing BS3. The unit will stop and return to idle
condition.
10
Open valve A.
11
Charge refrigerant until the remaining determined additional
refrigerant amount is added, and then close valve A.
12
Press BS3 to stop the manual additional refrigerant charge
mode.
NOTICE
Make sure to open all stop valves after (pre-) charging the
refrigerant.
Operating with the stop valves closed will damage the
compressor.
NOTICE
After adding the refrigerant, do not forget to close the lid of
the refrigerant charging port. The tightening torque for the
lid is 11.5 to 13.9 N•m.
14.4.4
Error codes when charging refrigerant
INFORMATION
If a malfunction occurs:
▪ In case of 5 HP: The error code is displayed on the
user interface of the indoor unit.
▪ In case of 8 HP: The error code is displayed on the
compressor unit's 7‑segments display and on the user
interface of the indoor unit.
If a malfunction occurs, close valve A immediately. Confirm the
malfunction code and take corresponding action,
problems based on error codes"
14.4.5
To fix the fluorinated greenhouse gases
label
1
Fill in the label as follows:
b
Contains fluorinated greenhouse gases
2
1
1
1
2
2
kg
tCO
2
eq
GWP × kg
1000
=
=
+
kg
=
kg
=
GWP: XXX
RXXX
a
f
c
d
e
a
If a multilingual fluorinated greenhouse gases label is
delivered with the unit (see accessories), peel off the
applicable language and stick it on top of
a
.
b
Factory refrigerant charge: see unit name plate
c
Additional refrigerant amount charged
d
Total refrigerant charge
e
Quantity of fluorinated greenhouse gases
of the total
refrigerant charge expressed as tonnes CO
2
equivalent.
f
GWP = Global warming potential
NOTICE
Applicable legislation on
fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO
2
equivalent.
Formula to calculate the quantity in CO
2
equivalent
tonnes:
GWP value of the refrigerant × total refrigerant
charge [in kg] / 1000
Use the GWP value mentioned on the refrigerant charge
label.
2
Fix the label on the inside of the compressor unit. There is a
dedicated place for it on the wiring diagram label.
15
Electrical installation
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
15.1
About electrical compliance
Only for RKXYQ8
This equipment complies with:
▪
EN/IEC 61000‑3‑12
provided that the short-circuit power S
sc
is
greater than or equal to the minimum S
sc
value at the interface
point between the user's supply and the public system.
▪ EN/IEC
61000‑3‑12
=
European/International
Technical
Standard setting the limits for harmonic currents produced by
equipment connected to public low-voltage systems with input
current >16 A and ≤75 A per phase.
▪ It is the responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected ONLY to a supply
with a short-circuit power S
sc
greater than or equal to the
minimum S
sc
value.
Model
Minimum S
sc
value
RKXYQ8
3329 kVA
15.2
Safety device requirements
NOTICE
When using residual current operated circuit breakers, be
sure to use a high-speed type 300 mA rated residual
operating current.
