Service Mode Operation; Caution For Refrigerant Leaks - Panasonic U-5MX4XPQ Manuel D'installation

13. S
ERVICE MODE OPERATION
Vacuuming method
At the first installation, this vacuuming is not required. It is required
only for repair purposes.
1 When the unit is at standstill and under the setting mode 2, set
the required function B (refrigerant recovery operation/
vacuuming operation) to
ON
- After this is set, do not reset the setting mode 2 until the
vacuuming is finished.
- The H1P led is on and the remote controller indicates
(test operation) and
operation will be prohibited.
2 Evacuate the system with a vacuum pump.
3 Press the button and reset the setting mode 2.
BS1 MODE
Refrigerant recovery operation method
by a refrigerant reclaimer
1 When the unit is at standstill and under the setting mode 2, set
the required function B (refrigerant recovery operation/
vacuuming operation) to
ON
- The indoor unit and the outdoor unit expansion valves will
fully open and some solenoid valves will be turned on.
- The H1P led is on and the remote controller indicates
(test operation) and
operation will be prohibited.
2 Cut off the power supply to the indoor units and the outdoor unit
with the circuit breaker. After the power supply to one side is cut
off, cut off the power supply to the other side within 10 minutes.
Otherwise, the communication between the indoor and outdoor
unit may become abnormal and the expansion valves will be
completely closed again.
3 Recover the refrigerant by a refrigerant reclaimer. For details,
see the operation manual delivered with the refrigerant
reclaimer.
Installation manual
27
(ON).
(external control) and the
(ON).
(external control) and the
14. C
AUTION FOR REFRIGERANT LEAKS
Introduction
The installer and system specialist shall secure safety against
leakage according to local regulations or standards. The
following standards may be applicable if local regulations are
not available.
This system uses R410A as refrigerant. R410A itself is an entirely
safe non-toxic, non-combustible refrigerant. Nevertheless care must
be taken to ensure that air conditioning facilities are installed in a
room which is sufficiently large. This assures that the maximum
concentration level of refrigerant gas is not exceeded, in the unlikely
event of major leak in the system and this in accordance to the local
applicable regulations and standards.
Maximum concentration level
The maximum charge of refrigerant and the calculation of the
maximum concentration of refrigerant is directly related to the
humanly occupied space in to which it could leak.
The unit of measurement of the concentration is kg/m
3
kg of the refrigerant gas in 1 m
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
According to the appropriate European Standard, the maximum
allowed concentration level of refrigerant to a humanly space for
3
R410A is limited to 0.44 kg/m .
1 direction of the refrigerant flow
2 room where refrigerant leak has occurred (outflow of all the
refrigerant from the system)
Pay special attention to places, such as a basements, etc. where
refrigerant can stay, since refrigerant is heavier than air.
Procedure for checking maximum concentration
Check the maximum concentration level in accordance with steps 1
to 4 below and take whatever action is necessary to comply.
1 Calculate the amount of refrigerant (kg) charged to each system
separately.
+
amount of additional charging
refrigerant in a amount (amount of
single unit system refrigerant added
(amount of locally in
refrigerant with accordance with
which the system the length or
is charged before diameter of the
leaving the factory) refrigerant piping)
NOTE Where a single refrigerant facility is divided into
2 entirely independent refrigerant systems, use the
amount of refrigerant with which each separate system
is charged.
3
(the weight in
volume of the occupied space).
1
2
=
total amount of
refrigerant (kg) in
the system
U-5~18MX4XPQ
Urban Multi air conditioner
4PW28163-1C