Design Technical Manual

Table Of Contents
IN THE CASE OF TWO OUTDOOR UNITS CONNECTED
c
d
b
a
e
H
1
H
2
H
5
H
6
H
4
H
3
*4
Limitation:
ft. (m)
Diagram
Allowable pipe length
(actual pipe length)
Between master outdoor unit and the farthest indoor unit 541 (165) or less a + b + c
Between the rst separation tube and the farthest indoor unit 197 (60) or less a
Total pipe length 3280 (1000) or less *1 Total
Between outdoor unit and outdoor unit branch kit 9 (3) or less c, d
Between multi type of RB unit 3 (1) or less e
Allowable height di󰀨erence
Between outdoor
unit and indoor unit
Outdoor unit is higher than indoor unit 164 (50) or less
H1
Outdoor unit is
lower than indoor
unit
*2
O.T. ≥ 23°F (-5°C) 131 (40) or less
*2
O.T. < 23°F (-5°C) 16 (5) or less
Between indoor unit 49 (15) or less H2
Between outdoor unit 19-11/16in. (0.5) or less H3
Between RB unit 49 (15) or less H4
Between RB unit and indoor unit 16 (5) or less H5
Between multi type of RB unit 13/16in. (20mm) or less *6 H6
¾
1 : Total pipe length is limited by the condition that total refrigerant amount should not exceed 154lbs. (70kg).
¾
2: O.T. = Outdoor Temperature.
¾
4 : Although "b" does not have limitation. Set to be 541’ (165m) or less in total pipe length of "a+b+c".
¾
5 : The pipe length is 25’ (7.5m) or more, between master outdoor unit and the nearest indoor unit.
¾
6 : The height of "multi type of RB unit by the down stream" should be lower than "multi type of RB unit by the up stream".
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SYSTEM
DESIGN
SYSTEM
DESIGN