Mitsubishi Heavy Industries SRRM40HENG-L, Руководство пользователя

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461
FDEN-C
Table of bypass factor
Model
Item
Max.one way piping length
Max.vertical height difference
FDEN208, 258 type
30m 50m
20m(Outdoor unit is higher)
15m(Outdoor unit is lower)
30m(Outdoor unit is higher)
15m(Outdoor unit is lower)
FDEN308, 408, 508 type
(2) Correction of cooling capacity in relation to flow rate control (fan speed)
Coefficient: 1.00 at High, 0.95 at Low
(3) Correction of cooling capacity in relation to one way length of refrigerant piping
It is necessary to correct the cooling capacity in relation to the one way equivalent piping length between the indoor and outdoor
units.
Note (1) Equivalent piping length can be obtained by calculating as follows.
208, 258, 308 series [
φ
15.88(5/8
″
)]: Equivalent piping length = Real piping (0.10
×
Number or bends in piping)
408, 508, series [
φ
19.05(3/4
″
)]: Equivalent piping length = Real piping (0.15
×
Number of bends in piping)
[Equivalent piping length < Limitation length of 5m]
(4) When the outdoor unit is located at a lower height than the indoor unit in cooling operation, the following values
should be subtracted from the values in the above table.
Piping length limitations
How to obtain the cooling capacity
Example : The net cooling capacity of the model FDENP308CEN-S with the air flow “High”, the piping length of 15m, the outdoor
unit located 5m lower than the indoor unit, indoor wet-bulb temperature at 19.0 ˚C and outdoor dry-bulb temperature 35 ˚C
is
Net cooling capacity = 7100
×
1.00
×
(0.98 - 0.01)
×
1.0 = 6887 w
Note (1) Values in the table indicate the one way piping length between the indoor and outdoor units.
Equivalent length
(1)
m 5 10 15 20 25 30 35 40 45 50 55
FDEN208 type
Cooling
FDEN258 type
FDEN308 type
FDEN408 type
FDEN508 type
1.0
1.0
1.0
1.0
1.0
0.995
0.995
0.99
0.995
0.99
0.995
0.99
0.98
0.985
0.975
0.99
0.985
0.97
0.98
0.965
0.985
0.98
0.96
0.97
0.95
0.985
0.975
0.95
0.965
0.94
0.98
0.97
0.94
0.955
0.925
_
_
0.93
0.95
0.915
_
_
0.92
0.94
0.9
_
_
0.91
0.935
0.89
_
_
0.9
0.925
0.875
Height difference between the indoor unit and
outdoor unit in the vertical height difference
Adjustment coefficient 0.01
5m
0.02
10m
0.03
15m
Factor by air
temperatures
FDENP308CEN-S Air flow
“High”
Length 15m.
Height difference 5 m
Item
Air flow
Hi 0.031 0.030 0.036 0.018
Lo 0.016 0.013 0.018 0.010
Model
FDEN208C FDEN258C FDEN308C FDEN408,508C