145
7. CAPACITY TABLES
HEAT SOURCE
WR2
MEE15K036
7-3-3. How to obtain the equivalent piping length
7-4. Correction by port counts of the BC controller
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.
1 PQRY-P200YLM
Equivalent length = (Actual piping length to the farthest indoor unit) + (0.35 × number of bends in the piping) m
2 PQRY-P250,
300YLM
Equivalent length = (Actual piping length to the farthest indoor unit) + (0.42 × number of bends in the piping) m
3 PQRY-P350, 400, 450, 500, 550, 600Y(S)LM
Equivalent length = (Actual piping length to the farthest indoor unit) + (0.50 × number of bends in the piping) m
4 PQRY-P700, 750, 800YSLM
Equivalent length = (Actual piping length to the farthest indoor unit) + (0.70 × number of bends in the piping) m
5 PQRY-P850,
900YSLM
Equivalent length = (Actual piping length to the farthest indoor unit) + (0.80 × number of bends in the piping) m
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