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Indoor unit sizes P200 and P250 must be connected to 2 ports on the BC controller.
Indoor unit sizes from P100 to P140 should normally be connected to 2 ports on the BC controller (set BC controller
DIP-SW 4-6 to its ON position).
In cases whereby indoor unit sizes from P100 to P140 are connected to only 1port on the BC controller (set BC controller
DIP-SW 4-6 to its OFF position), the cooling capacity of the indoor unit should be multiplied by a correction factor of
0.97.
Piping equivalent length (m)
1.00
0.90
0.80
0.95
0.85
0.75
0.65
0.70
Heating capacity correction factor
0
20
40
60
80
100 120 140 160 180
PQRY-P200YHM-A
Piping equivalent length (m)
1.00
0.90
0.80
0.95
0.85
0.75
0.65
0.70
Heating capacity correction factor
0
20
40
60
80
100 120 140 160 180
PQRY-P400, 450, 500YSHM-A
Piping equivalent length (m)
1.00
0.90
0.80
0.95
0.85
0.75
0.65
0.70
Heating capacity correction factor
0
20
40
60
80
100 120 140 160 180
PQRY-P250, 300YHM-A
Piping equivalent length (m)
1.00
0.90
0.80
0.95
0.85
0.75
0.65
0.70
Heating capacity correction factor
0
20
40
60
80
100 120 140 160 180
PQRY-P550, 600YSHM-A
1 PQRY-P200YHM
Equivalent length = (Actual piping length to the farthest indoor unit) + (0.35 × number of bends in the piping) m
2 PQRY-P250, 300YHM
Equivalent length = (Actual piping length to the farthest indoor unit) + (0.42 × number of bends in the piping) m
3 PQRY-P400, 450, 500, 550, 600YSHM
Equivalent length = (Actual piping length to the farthest indoor unit) + (0.50 × number of bends in the piping) m
(1)-6-2 Heating capacity correction
(1)-6-3 How to obtain the equivalent piping length
(1)-6-4 Correction by port counts of the BC controller
