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Mitsubishi Electric PURY-WP200 Service Manual page 26

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[ I Read Before Servicing ]
3. Correction by brine concentration
In HYBRID CITY MULTI system, brine should be used to prevent the system from freezing. Refer to the following graphs for the
capacity correction by brine.Refer to (1) for brine concentration, (2) and (3) for capacity correction by brine concentration.
(1) Brine concentration
Use propylene glycol solution for antifreeze.
Refer to the following graph to estimate the brine concentration required for freeze protection.
0
-5
-10
-15
-20
-25
-30
0
10
20
Brine concentration [wt%]
(2) Capacity correction by brine concentration (cooling)
PURY-WP200, 250YJM-A
1
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0.9
0
10
Brine concentration [wt%]
(3) Capacity correction by brine concentration (heating)
PURY-WP200, 250YJM-A
1
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0.9
0
10
Brine concentration [wt%]
HWE1113B
30
40
50
60
20
30
40
20
30
40
70
1
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0.9
50
0
10
1.2
1.18
1.16
1.14
1.12
1.1
1.08
1.06
1.04
1.02
1
50
0
10
- 17 -
20
30
40
Brine concentration [wt%]
20
30
40
Brine concentration [wt%]
50
50
GB
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