Mitsubishi Heavy Industries SRRM40HENG-L, Руководство пользователя

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668
FDFL-H
(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.
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
FDFL258 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
Note (1) Equivalent piping length can be obtained by calculating as follows.
258, 308 series [
φ
15.88(5/8
″
)]: Equivalent piping length = Real piping (0.10
×
Number or 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.
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
FDFL258 type FDFL308 type
Max. one way piping length 30m 50m
Max. vertical height difference
Outdoor unit is higher 20m Outdoor unit is higher 30m
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 FDFL308HEN-SA 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 FDFL308HEN-SA Air flow
“High”
Length 15m.
Height difference 5 m
Cooling
FDFL308 type
Air flow
Hi 0.030 0.036
Lo 0.013 0.018
(2) Correction of cooling and heating capacity in relation to air flow rate control (fan speed)
Coefficient: 1.00 at High, 0.95 at Low
Item
Model
FDFL 258 type FDFL 308 type
Table of bypass factor