Sanyo SPW-CR703GDCH8 - Page 27

II - 5
Design of W-ECO MULTI SYSTEM
2
TD831077
1. Model Selecting and Capacity Calculation
(Outdoor unit corrected capacity)
(Total rated capacity of the indoor
units of identical system)
100
Indoor / outdoor capacity ratio (%)
608_8132
Increasing ratio of outdoor unit capacity (%)
100
100.75
101
101.75
102
103
104
105
106
107
108
107110 120 130
Heating
Cooling
=
=
7 Outdoor unit capacity when the indoor / outdoor capacity ratio is in the range of 100 % to 130 %
The outdoor unit capacity, in case the indoor / outdoor
capacity ratio is 100 % - 130 %, can be found out from
the table of corrected capacities given the graph shown
on the right.
Ex: When both the indoor / outdoor capacity ratios are
107 % as against the cooling capacity of 28.0 kW
(95,500 BTU/h) and heating capacity of 31.5 kW
(107,500 BTU/h) of the outdoor unit, the outdoor
unit capacity is obtained from the graph on the
right as follows.
• Corrected Cooling Capacity = 1.0175 × 28.0 (95,500)
28.49 kW (97,170 BTU/h)
• Corrected Heating Capacity = 1.0075 × 31.5 (107,500)
31.74 kW (108,310 BTU/h)
The corrected capacity of each indoor unit is found out
from the ratio of the above given outdoor unit corrected
capacity and the total capacity of indoor units.
Corrected capacity of each indoor unit = Rated capacity ×
* The results of above calculation are given on the table on next page (table of corrected capacities). The corrected
capacities of indoor and outdoor units can be found out from the calculation of indoor / outdoor capacity ratio only.
7 Capacity correction by the temperature conditions of indoor / outdoor unit:
22
22
2
The capacity correction value (capacity coefficient
22
22
2 ) according to the temperature conditions of indoor / outdoor unit
can be found out from the graph given on P. II-8, II-10.
7 Capacity correction by tubing length and elevation difference:
33
33
3
The capacity correction value (capacity coefficient
33
33
3) according to the tubing length and elevation difference can be
found out from the graph given on P. II-9, II-11.
7 Heating capacity correction coefficient at the time of frosting / defrosting:
44
44
4
The above value (capacity correction coefficient
44
44
4 ) can be found out from the table given on P. II-8, II-10.