Daikin VRV III REMQ72PBYD Engineering Data page 88

Installation
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 operation
• Check that all work for the BS, indoor unit are finished and there
are no danger to operate.
13-2 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
corresponding 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
controller to see if they operate properly.
NOTE
• Heating is not possible if the outdoor temperature is 75°F 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 installation, the
malfunction code "U3" will be displayed in the remote controller.
Perform the check operation following "11-2-2 Procedure of Check
Operation".
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
INDICATION" 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 electrical components box lid, the inspection door, and the
unit casing are all attached.
88
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 follow-
ing standards may be applicable if local regulations are not avail-
able.
The VRV System, like other air conditioning systems, uses
R-410A as refrigerant. R-410A 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
that 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 lb/ft
weight in lb of the refrigerant gas in 1 ft
occupied space).
Compliance to the local applicable regulations and standards
for the maximum allowable concentration level is required.
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 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2 below and take whatever action is necessary to
comply.
1. Calculate the amount of refrigerant (lb) charged to each
system separately.
amount of refriger- additional charging
ant in a single unit + amount (amount of
system (amount of refrigerant added
refrigerant with locally in accordance
which the system is with the length or
charged before diameter of the refrig-
leaving the factory) erant piping)
NOTE
Where a single refrigerant facility is divided into 2 entirely
•
independent refrigerant systems then use the amount of
refrigerant with which each separate system is charged.
Follow local code requirements (ASHRAE-15 2007 &
ASHRAE-34 2007).
EDUS391004-N
3
(the
3
volume of the
total amount
= of refrigerant
(lb) in the
system
Installation of Outdoor Units