Daikin VRV Plus Series General Information Manual page 42

Si33-003.book Page 38 Monday, June 25, 2001 9:06 AM
Installation
Piping Diameter for
Grouped Drain
Pipes
1. Relationship between horizontal pipe diameter and allowable drainage (for extended ventilation
JIS nominal
Notes:
2. Relationship between riser diameter and allowable drainage (for extended ventilation system)
JIS nominal
Notes:
38
Select piping diameter from the below table in accordance with the amount of condensation drained by
all units with a common drain pipe.
Consider 2 l/hr of drainage for every 1 HP. For example, drainage from 3 units running at 2 HP and 2
units running at 3 HP is calculated as follows.
2 (l/hr) × 2 (HP) × 3 (units) + { 2 (l/hr) × 3 (HP) × 2 (units) = 24 l/hr
system)
Vinyl chloride pipe
diameter (mm)
Piping gradient 1:50
VP20 20
VP25 25
VP30 31
VP40 40
VP50 51
Calculations have been made with water area inside the pipe as 10%.
Allowable flow rate figures below the decimal have been discarded.
Use VP30 or larger pipe after the convergence point.
Vinyl chloride pipe Allowable flow rate
diameter (mm)
VP20 20
VP25 25
VP30 31
VP40 40
VP50 51
VP65 67
VP75 77
Allowed flow rate figures below the decimal have been discarded.
Use VP30 or larger pipe in risers.
Use the same drain pipe for the humidifier as the indoor unit.
Allowable flow rate (l/hr)
Piping gradient 1:100
39 27
70 50
125 88
247 175
473 334
Remarks
(l/hr)
220
(Reference value) Cannot
be used in grouped piping.
410
730
1440
Can be used in grouped
2760
piping.
5710
8280
: http://splitoff.ru/tehn-doc.html
SiE33-003
Remarks
(Reference value) Cannot
be used in grouped piping.
Can be used in grouped
piping.
General Information