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Idiomas disponibles
Idiomas disponibles
Maximum Permissible Concentration of HFC GAS R410A
The refrigerant R410A is an incombustible and non-toxic gas.
However, if leakage occurs and gas fills a room, it may cause suffocation.
Once leakage occurs, it is a must to take effective actions to make the concentration of R410A lower than
0.42 kg/m
3
.
2.
Calculation of Refrigerant Concentration
(1) Calculate the total quantity of refrigerant R (kg) charged in the system connecting all the indoor units of
target rooms.
(2) Calculate the volume of the room installing this unit V (m
3.
Calculate the refrigerant concentration C (kg/m
Please follow local codes or regulations, if any.
8. Test Run
Test run should be performed according to Item 8.2. And use the Table 8.1 for recording test run.
●
Do not operate the system until all the check points have been cleared.
As for the test run of indoor unit and water module, check "Installation & Maintenance Manual" attached to the indoor
unit and water module.
8.1 Before Test Run
(1) Check to ensure that the refrigerant piping and transmission between outdoor unit, SW BOX, indoor units or water
modules are connected to the same refrigerant cycle. If not, it will cause an abnormal operation and a serious accident.
Check that the dip switch setting of the refrigerant cycle number and the unit number for the indoor units and water modules
apply to the system. Confirm that the dip switch setting on the printed circuit board of the indoor units, water modules and
the outdoor units are correct. Especially pay attention to the setting of lift between indoor units and outdoor unit, the
refrigerant No. and the terminal resistance.
(2) Check to ensure that the electrical resistance is more than
terminal of the electrical parts. If not, do not operate the system until the electrical leakage is located and fixed (Refer to
"Caution for Insulation Resistance" for details.). Do not impress the voltage on the terminals for transmission.
(3) Check to ensure that each wire, L1, L2, L3 is correctly connected at the power source. If incorrectly connected, the unit
will not operate and the remote control switch will indicate the alarm code "05". In this case, check and change the phase of
the power source according to the attached sheet on the reverse side of the service cover.
(4)
Check to ensure that the switch on the main power source has been ON for more than 4 hours, to warm up the
compressor oil by the heater. When powered, the outdoor units will not operate (Stoppage Code d1-22) immediately if it is in
protection status due to low compressor oil temperature. In case of operating within 2 hours, release the protection control
as follows:
1. Supply power to the outdoor unit.
2. Wait for 30 seconds
3. Push PSW5 on the outdoor PCB more than 3 seconds in order to release the d1-22.
4. In case of using remote control switch for release, push "Air Flow" and "Auto Louver" simultaneously for 3
seconds.
(5) Main Unit Label
In case of the combination of basic units, attach the main unit label on a visible spot of the main unit (outdoor unit A), so
that the outdoor unit A can be identified easily. Do not attach the main label on the sub unit (outdoor unit B, C and D).
(6) Water circuit check before test run (In case of the water module is utilized in the system)
(A) Before the test run, please check again if all the water pipe construction is in the proper state.
(B) Inject water into the water module and make sure that the plate type heat exchanger is filled with cycling water;
open the water pump and exhaust valve and make sure that air in the unit and pipeline is already exhausted.
(C) Force the running of the water pump, read the value on the pressure gauge and confirm the action of the
flow switch to check if the water cycle system is properly installed. (Refer to installation manual of water module)
CAUTION
3
).
3
) of the room according to the above equation.
WARNING
1MΩ,
by measuring the resistance between ground and the
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