Daikin VRV II Series, Инструкции по проектированию, установке и тестированию, Страница: 46 / 242

Installation Si39-303
40 General Information
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)
Notes: !
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)
Notes: !
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.
3.2.9 Drain Piping for Each Model
Ceiling Mounted
Cassette Type
(FXCQ-M Double
flow)
1. Rig drain piping
!
The diameter of the drain pipe should be greater than or equal to the diameter of the connecting pipe
(vinyl tube, pipe size: 25 mm; outer dimension: 32 mm).
!
Keep the drain pipe short and sloping downwards at a gradient of at least 1/100 to prevent air pockets
from forming.
!
If the drain hose cannot be sufficiently set on a slope, execute the drain raising piping.
!
To keep the drain hose from sagging, space hanging wires every 1 to 1.5 m.
!
Use the attached drain hose and clamp metal.
Insert the drain hose into the drain socket, up to the white tape. Tighten the clamp until the screw head
is less than 4mm from the hose.
!
Wrap the attached sealing pad over the clamp and drain hose to insulate.
JIS nominal
Vinyl chloride pipe
diameter (mm)
Allowable flow rate (l/hr)
Remarks
Piping gradient 1:50 Piping gradient 1:100
VP20 20 39 27
(Reference value) Cannot
be used in grouped piping.
VP25 25 70 50
VP30 31 125 88
Can be used in grouped
piping.
VP40 40 247 175
VP50 51 473 334
JIS nominal
Vinyl chloride pipe
diameter (mm)
Allowable flow rate
(l/hr)
Remarks
VP20 20 220
(Reference value) Cannot
be used in grouped piping.
VP25 25 410
VP30 31 730
Can be used in grouped
piping.
VP40 40 1440
VP50 51 2760
VP65 67 5710
VP75 77 8280