-

 11 

-

2.5 Selection chart

Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be

obtained in the following way.

   Net capacity = Capacity shown on specification

 ✕ 

Correction factors as follows.

(1)

Coefficient of cooling and heating capacity in relation to temperatures

(2)

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 piping length between the indoor and outdoor
units.

(3)

Correction relative to frosting on outdoor heat exchanger during heating

In additions to the foregoing corrections (1), (2) the heating capacity needs to be adjusted also with respect to the frosting on the
outdoor heat exchanger.

   How to obtain the cooling and heating capacity

Example : The net cooling capacity of the model SRK40HD-S with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C

and outdoor dry-bulb temperature 35˚C is Net cooling capacity =        3600      

✕

        0.975       

✕

       1.0       

=

       3510 w

SRK40HD-S

Length 15m

Factor by air

temperatures

15

ISO-T1 Standard Condition

Outdoor air W.B. temperature 

°

C W.B.

0

10

-10

-5

5

14

16

18

20

22

15

10

27
25

20

15

20

25

30

35

40

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

43

24

20

ISO-T1 Standard Condition

Indoor air W.B. temperature 

°

C W.B.

Heating

Cooling

Applicable range

Coefficient of cooling &

Heating capacity in 

relation to temperature

Cooling operation

Outdoor air D.B.

temperature

°

C D.B.

Heating operation

Indoor air D.B.

temperature

°

C D.B.

Piping length [m]

Cooling

Heating

7

1.0

1.0

10

0.99

1.0

15

0.975

1.0

Air inlet temperature of

outdoor unit in ˚C WB

Adjustment coefficient

-10

0.95

-9

0.94

-7

0.93

-5

0.91

-3

0.88

-1

0.86

1

0.87

3

0.92

5

1.00

Опубликовано TopClimat