Daikin REYQ96MTJU, Инструкция по проектированию, установке и испытаниям, Страница: 51 / 236

Si39-406 Installation
General Information 45
Piping Diameter
for Grouped
Drain Pipes
„
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
1. Relationship between horizontal pipe diameter and allowable drainage (for extended ventilation
system)
Note:
„
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.
2. Relationship between riser diameter and allowable drainage (for extended ventilation system)
Note:
„
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.
JIS nominal
Vinyl chloride pipe
diameter in. (mm)
Allowable flow rate (l/hr)
Remarks
Piping gradient 1:50 Piping gradient 1:100
VP20 3/4" (20) 39 27
(Reference value) Cannot be
used in grouped piping.
VP25 1" (25) 70 50
VP30 1 1/4" (31) 125 88
Can be used in grouped
piping.
VP40 1 1/2" (40) 247 175
VP50 2" (51) 473 334
JIS nominal
Vinyl chloride pipe
diameter in. (mm)
Allowable flow rate
(l/hr)
Remarks
VP20 3/4" (20) 220
(Reference value) Cannot
be used in grouped piping.
VP25 1" (25) 410
VP30 1 1/4" (31) 730
Can be used in grouped
piping.
VP40 1 1/2" (40) 1440
VP50 2" (51) 2760
VP65 2 1/2" (67) 5710
VP75 3" (77) 8280