Mitsubishi FDT208HEN-S, Instruction Manual

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230
FDTN-H
Equivalent piping length
(1)
m
5 10 15 20 25 30 35 40 45 50 55
Heating 1.0 1.0 1.0 1.0 1.0 0.995 0.995 0.99 0.99 0.985 0.985
FDTN, FDT208 type 1.0 0.995
   
FDTN, FDT258 type 1.0 0.995 0.99 0.985 0.98 0.975 0.97
   
1.0 0.99
0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91 0.9
1.0
0.995 0.985 0.98 0.97 0.965 0.955 0.95 0.94 0.935 0.925
1.0
0.99 0.975 0.965 0.95 0.94 0.925 0.915 0.9 0.89 0.875
1.0 0.99
   
1.0
   
1.0
   
(3) Correction of cooling and heating capacity in relation to one way length of refrigerant piping
It is necessary to correct the cooling and heating 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 and when the outdoor unit is
located at a higher height than the indoor unit in heating operation, the following values should be subtracted from the values in
the above table.
50/60Hz
Height difference between the indoor unit and
outdoor unit in the vertical height difference
5m 10m 15m 20m 25m 30m
Adjustment coefficient 0.01 0.02 0.03 0.04 0.05 0.06
Piping length limitations
Item
Model FDTN, FDT208, 258 FDTN, FDT308~508 FDTN, FDT208~508
Max. one way piping length 30m 50m 30m
Max. vertical height difference
Outdoor unit is higher 20m Outdoor unit is higher 30m
15m
Outdoor unit is lower 15m Outdoor unit is lower 15m
Note (1) Values in the table indicate the one way piping length between the indoor and outdoor units.
How to obtain the cooling and heating capacity
Example : The net cooling capacity of the model FDTN308HEN-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
Factor by air
temperatures FDTN308HEN-S Air flow
“High”
Length 15m.
Height difference 5 m
0.995 0.99 0.985 0.985 0.98
/0.99 /0.985 /0.98 /0.975 /0.97
Cooling
FDTN, FDT308 type
(FDC308 type)
FDTN, FDT408 type
(FDC408 type)
FDTN, FDT508 type
(FDC508 type)
FDTN, FDT308 type
(FDC306 type)
FDTN, FDT408 type
(FDC406 type)
FDTN, FDT508 type
(FDC506 type)
0.98 0.97 0.96 0.95 0.94
/0.975 /0.965 /0.95 /0.94 /0.925
0.995 0.985 0.98 0.97 0.965 0.955
/0.99 /0.98 /0.97 /0.96 /0.95 /0.94
0.99 0.975 0.965 0.95 0.94 0.925
/0.985 /0.97 /0.955 /0.94 /0.925 /0.91
(FDC208, 258 type) (FDC308~508 type) (FDC206~506 type)