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12. ONSITE SETTINGS
Note
In the case of a multi system, all onsite settings should be made
on the master unit. Settings made on sub units are invalid.
The outdoor unit to which the indoor unit transmission wire are
connected is the master unit, and all other units are sub units.
12-1 Onsite Settings With the Power Off
If the COOL/HEAT selector was
connected to the outdoor unit in
“7. FIELD WIRING”, set the dip
switch (DS1) on the outdoor unit
PC-board (A1P) to “ON” (it is set
to “OFF” when shipped from the
factory).
For the position of the dip switch
(DS1), see the “Service Precau-
tions” label (see at right) which is attached to the EL. COMPO. BOX
lid.
WARNING
ELECTRIC SHOCK WARNING
Never perform with the power on.
There is a serious risk of electric shock if any live part is touched.
12-2 Onsite Settings With the Power On
Use the push button switches (BS1 through BS5) on the outdoor unit
PC-board (A1P) to make the necessary onsite settings.
See the “Service Precautions” label on the EL. CONPO. BOX lid for
details on the positions and operating method of the push button
switches and on the onsite setting.
Make sure to record the setting on the accessory “REQUEST FOR
THE INDICATION” label.
WARNING
ELECTRIC SHOCK WARNING
Use an insulated rod to operate the push buttons via the inspection
door of EL. COMPO. BOX lid.
There is a risk of electric shock if you touch any live parts, since this
operation must be performed with the power on.
13. TEST RUN
13-1 Before test run
•
Make sure the following works are completed in accordance with
the installation manual.
Piping work
Wiring work
Air tight test
Vacuum drying
Additional refrigerant charge
•
Check that all work for the indoor unit are finished and there are
no danger to operate.
13-2 Test Run
After check operation is 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.
13-3 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.
14. 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.
Inspection
door
[Service Precautions]
label
EL.COMPO.
BOX lid
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
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