Correction Of Cooling And Heating Capacity In Relation To Air Flow Rate Control (Fan Speed); Correction Of Cooling And Heating Capacity In Relation To One Way Length Of Refrigerant Piping; Height Difference Between The Indoor Unit And Outdoor Unit - Mitsubishi Heavy Industries SRK100VNXPZSX Technical Manual

2.7.2 Correction of cooling and heating capacity in relation to air flow rate control
(fan speed)
Fan speed Hi
1.00
Coefficient
2.7.3 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.
Models 100 - 140
Equivalent piping length (m)
Heating
100 model
125 model
140 model
Cooling
100 model
125 model
140 model
Note (1) Calculate the equivalent length using the following formula.
However, install the piping so that the piping length is within +5 m of the limit length (actual length) for the respective types.
• Equivalent length =Actual length + (Equivalent bend length x number of bends in the piping.)
Equivalent length per bend.
Gas pipe diameter (mm)
Equivalent bend length

2.7.4 Height difference between the indoor unit and outdoor unit

When the outdoor unit is located below indoor units in cooling mode, or when the outdoor unit is located above indoor units in
heating mode, the correction coefficient mentioned in the below table should be subtracted from the value in the above table.
Height difference between the indoor unit and
outdoor unit in the vertical height difference
Adjustment coefficient
Piping length limitations
Item
Max. one way piping length
Max. vertical height difference
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
located 5m lower than the indoor unit, indoor wet-bulb temperature at 19.0℃ and outdoor dry-bulb temperature 35℃ is
Net cooling capacity =
Net cooling total capacity
of SRK100VNPZSX
(Outdoor temp. : 35℃DB
Indoor temp. : 19℃WB)
shown in table 2.7.1
Me Lo
0.97 0.95
(1)
7.5 10
1 1
1 0.991
1 0.986
φ15.88
1 0.985
1.016 1.013
1.022 1.018
φ19.05
1.026 1.021
φ 12.7 φ 15.88
0.20 0.25
Model
SRK100VNPZSX
10.0 × 1.00
Air flow : Hi
shown in table 2.7.2
15 20 25 30
1 1 1 0.998
0.978 0.964 0.951 0.937
0.968 0.950 0.932 0.914
0.966 0.946 0.927 0.907
0.991
1.007 1.002 0.996
1.009 1.001 0.992 0.984
1.011 1.002 0.992 0.983
φ 19.05 φ 22.22 φ 25.4
0.30 0.35 0.40
5m 10m 15m
0.99 0.98 0.97
100, 125, 140
Outdoor unit is higher 30m
Outdoor unit is lower 15m
with the air flow "Hi", the piping length of 15m, the outdoor unit
× 0.978 × 0.99
Piping length :15m
(Gas pipe size is φ15.88)
shown in table 2.7.3
176
- -
'17 • PAC-T-257
35 40 45 50
0.993 0.993
0.998 0.988
0.924 0.910 0.897 0.883
0.896 0.878 0.860 0.842
0.888 0.868 0.849 0.829
0.980 0.974 0.969
0.985
0.975 0.967 0.958 0.950
0.973 0.964 0.954 0.945
φ 28.58
0.45
20m 25m
0.96 0.95
50m
. = .
9.7kW
Height diff. :5m
(Outdoor unit : below)
shown in table 2.7.4
55
0.988
0.870
0.824
0.810
0.963
0.941
0.935
30m
0.94