Air-to-water Heat Pump
14
7.2.6 Safety operation of flammable refrigerant
(1) Qualification requirement for installation and maintenance man7 Installation of Hydraulic Unit
All the work men who are engaging in the refrigeration system should bear the valid certification
awarded by the authoritative organization and the qualification 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 qualification for using the flammable 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 fire source, 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.
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
floor 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 fire source or potential fire source in the maintenance area.
The naked flame 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:
1) Shut down the unit and cut power supply
2)
Eliminate the refrigerant
3)
Vacuuming
4)
Clean it with N
2
gas
5)
Cutting or welding
6)
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 flame near the outlet of the vacuum pump and it’s
well-ventilated.
Содержание GRS-Cm18PdRe/NhA-M
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