# Daikin RXYQ5PY1 Service Manual Page 55

R-410a heat pump 50hz/60hz cooling only 50hz.

SiEN34-705
Piping Diameter
! Select piping diameter from the below table in accordance with the amount of condensation
for Grouped
! Consider 2 l/hr of drainage for every 1 HP. For example, drainage from 3 units running at 2
Drain Pipes
1. Relationship between horizontal pipe diameter and allowable drainage (for extended
JIS nominal
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
JIS nominal
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
Drain Pump Kit
Cassette Type
(FXCQ-M Double
FXCQ–M
flow)
Drain Piping Work
〈〈Rig the drain pipe as shown below and take measures against condensation.
Improperly rigged piping could lead to leaks and eventually wet furniture and
belongings.〉〉
General Information
drained by all units with a common drain pipe.
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
ventilation system)
Vinyl chloride pipe
diameter (mm)
VP20
20
VP25
25
VP30
31
VP40
40
VP50
51
system)
Vinyl chloride pipe
diameter (mm)
VP20
20
VP25
25
VP30
31
VP40
40
VP50
51
VP65
67
VP75
77
Indoor unit
Standard (Equipped with indoor unit)
Allowable flow rate (l/hr)
39
70
125
247
473
Allowable flow rate
(l/hr)
220
(Reference value) Cannot
be used in grouped piping.
410
730
1440
Can be used in grouped
2760
piping.
5710
8280
Drain pump kit
Remarks
27
(Reference value) Cannot
be used in grouped piping.
50
88
Can be used in grouped
175
piping.
334
Remarks
Installation
49