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English
11. TEST RUN
11-1 Before test run
•
Make sure the following works are completed in accordance with
the installation manual.
Piping work
Wiring work
Air tight test and vacuum drying
Additional refrigerant charge
Check operation
•
Check that all work for the BS, indoor unit are finished and there
are no danger to operate.
11-2 Test Run
After all works are completed, operate the unit normally and check
the following.
(1) Make sure the indoor and outdoor units are operating normally.
(2) Operate each indoor unit one by one and make sure the corre-
sponding outdoor unit is also operating.
(3) Check to see if cold (or hot) air is coming out from the indoor unit.
(4) Push the fan direction and strength buttons on the remote control-
ler to see if they operate properly.
Note
•
Heating is not possible if the outdoor temperature is 24°C or
higher. Refer to the Operation manual.
•
If a knocking sound can be heard in the liquid compression of the
compressor, stop the unit immediately and then energize the
crank case heater for a sufficient length of time before restarting
the operation.
•
Once stopping, the compressor will not restart in about 5 minutes
even if the On/Off button of the remote controller is pushed.
•
When the system operation is stopped by the remote controller,
the outdoor units may continue operating for further 5 minutes at
maximum.
•
The outdoor unit fan may rotate at low speeds if the Night-time low
noise setting or the External low noise level setting is made, but
this is not a malfunction.
•
If the check operation was not performed at first istallation, the
malfunction code “U3” will be displayed in the remote controller.
Perform the check operation following “
9-3 Procedure of Check
Operation
”.
11-3 Checks After Test Run
Perform the following checks after the test run is complete.
•
Record the contents of field setting.
→
Record them on the accessory “REQUEST FOR THE INDI-
CATION” label.
And attach the label on the back side of the front panel.
•
Record the installation date.
→
Record the installation date on the accessory “REQUEST
FOR THE INDICATION” label in accordance with the
IEC60335-2-40.
And attach the label on the back side of the front panel.
Note
After the test run, when handing the unit over to the customer, make
sure the EL.COMPO.BOX lid, the inspection door, and the unit casing
are all attached.
12. CAUTION FOR REFRIGERANT LEAKS
(Points to note in connection with 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.
The VRV System, like other air conditioning systems, uses R410A as
refrigerant. R410A itself is an entirely safe non-toxic, non-combusti-
ble 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 refriger-
ant gas is not exceeded, in the unlikely event of major leak in the sys-
tem and this in accordance to the local applicable regulations and
standards.
Maximum concentration level
The maximum charge of refrigerant and the calculation of the maxi-
mum 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
( the weight in
kg of the refrigerant gas in 1m
3
volume of the occupied space).
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
In Australia the maximum allowed concentration level of refrigerant to
a humanly space is limited to 0.35kg/m
3
for R407C and 0.44kg/m
3
for
R410A.
1.
direction of the refrigerant flow
2.
room where refrigerant leak has occurred (outflow of all
the refrigerant from the system)
Pay a special attention to the place, such as a basement, 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.
Note
•
Where a single refrigerant facility is divided into 2 entirely inde-
pendent refrigerant systems then use the amount of refrigerant
with which each separate system is charged.
2.
Calculate the smallest room volume (m
3
)
Incase like the following, calculate the volume of (A), (B) as a sin-
gle room or as the smallest room.
A.
Where there are no smaller room divisions
B.
Where there is a room division but there is an opening
between the rooms sufficiently large to permit a free flow
of air back and forth.
1.
opening between rooms
2.
partition
(Where there is an opening without a door or where there are open-
ings above and below the door which are each equivalent in size to
0.15% or more of the floor area.)
amount of refriger-
ant in a single unit
system (amount of
refrigerant with
which the system
is charged before
leaving the factory)
+
additional charging
amount (amount of
refrigerant added
locally in accordance
with the length or
diameter of the refrig-
erant piping)
=
total amount
of refriger-
ant (kg) in
the system
2
1
1
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