21
Room is filled of leakage refrigerant
(All refrigerant has leaked out.)
4/6kW
Outdoor Unit
Indoor Unit
10 TEST RUNNING
Operate according to "key points for test running" on the electric control box cover.
CAUTION
● Test running can not start until the outdoor unit has been connected to the power for 12 hours.
● Test running can not start until all the valves are affirmed open.
● Never make the forced running .(Or the protector sits back, danger will occur.)
11 PRECAUTIONS ON REFRIGERANT LEAKAGE
When the refrigerant charge in appliance is more than 1.842kg, following requirements should be complied with.
● Requirements for charge limits in unventilated areas:
The maximum refrigerant charge in appliance shall be in accordance with the following:
m
max
= 2.5 x (LFL)
5/4
x 1.8 x (A)
1/2
or the required minium floor area Amin to install an appliance with refrigerant charge mc shall be in accordance with following:
Amin=( mc / ( 2.5 x (LFL)
5/4
x 1.8))
2
where
m
max
is the allowable maximum charge in a room,in kg
A
is the room area, in m
2
A
min
is the required minimum room area ,in m
2
m
c
is the refrigerant charge in appliance,in kg
LFL
is the lower flammable limit in kg/m
3
,the value is 0.306 for R32 refrigerant
● Install mechanical ventilator to reduce the refrigerant thickness ,under critical level. (ventilate regularly).
● Install leak alarm facility related to mechanical ventilator if you can not regularly ventilate.
Fig.11-1
1
3
2
16
7
6
5
4
8
9
10
11
12
13
14
15
17
18
19
20
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26
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24
27
