Gree GRS-CQ4.0Pd/NhG3-E

Air-to-water Heat Pump
19
MONOBLOC
TYPE
6.2.6 Safety operation of ammable refrigerant
(1) Qualication requirement for installation and maintenance
All the work men who are engaging in the refrigeration system should bear the valid certication awarded by the
authoritative organization and the qualication for dealing with the refrigeration system recognized by this industry.
If it needs other technician to maintain and repair the appliance, they should be supervised by the person who
bears the qualication for using the ammable refrigerant.
It can only be repaired by the method suggested by the equipment’s manufacturer.
(2) Installation notes
The unit is not allowed to use in a room that has running fire (such as firesource, working coal gas ware,
operating heater).
It is not allowed to drill hole or burn the connection pipe.
The unit must be installed in a room that is larger than the minimum room area. The minimum room area is
shown on the nameplate or following table.
A leak test is a must after installation.
Minimum
room
area
(m
2
)
Charge amount(kg) ≤1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5
oor location / 14.5 16.8 19.3 22 24.8 27.8 31 34.3 37.8 41.5 45.4 49.4 53.6
window mounted / 5.2 6.1 7 7.9 8.9 10 11.2 12.4 13.6 15 16.3 17.8 19.3
wall mounted / 1.6 1.9 2.1 2.4 2.8 3.1 3.4 3.8 4.2 4.6 5 5.5 6
ceiling mounted / 1.1 1.3 1.4 1.6 1.8 2.1 2.3 2.6 2.8 3.1 3.4 3.7 4
(3) Maintenance notes
Check whether the maintenance area or the room area meet the requirement.
- It’s only allowed to be operated in the rooms that meet the requirement
.
Check whether the maintenance area is well-ventilated.
- The continuous ventilation status should be kept during the operation process.
Check whether there is re source or potential re source in the maintenance area.
- The naked ame is prohibited in the maintenance area; and the “no smoking” warning board should be hanged.
nameplate.
Check whether the appliance mark is in good condition.
- Replace the vague or damaged warning mark.
(4) Welding
If you should cut or weld the refrigerant system pipes in the process of maintaining, please follow the steps as
below:
a. Shut down the unit and cut power supply
b. Eliminate the refrigerant
c. Vacuuming
d. Clean it with N
2
gas
e. Cutting or welding
f. Carry back to the service spot for welding
The refrigerant should be recycled into the specialized storage tank.
Make sure that there isn’t any naked ame near the outlet of the vacuum pump and it’s well-ventilated.
(5) Filling the refrigerant
Use the refrigerant filling appliances specialized for R32. Make sure that different kinds of refrigerant won’t
contaminate with each other.
The refrigerant tank should be kept upright at the time of lling refrigerant.
Stick the label on the system after lling is nished (or haven’t nished).
Don’t overlling.