R410a DC Inverter 60Hz Carrier service manual
138 Installation
pipe must be equipped with water storing elbow.
Function of water storing elbow:
When indoor unit is in motion, prevent generating negative pressure to cause drainage difficulty or blow
water out of the air outlet.
Installation of water storing elbow:
1. Install water storing elbow as shown in following figure: H shall be above 50mm.
2. Install one water storing elbow for each unit.
3. When installation, consider it shall be convenient in future clean.
4.3 Concentrated Drainage Pipe
4.3.1 Pipeline diameter of concentrated drainage pipe
Select drainage pipe diameter according to indoor unit’s combined flow volume.
E.g. If one 1HP unit with 2L/h discharging condensate water, the calculation of the combined flow
volume of three 2HP units and two 1.5HP units is: 2HP×2L/h×3 + 1.5HP×2L/h×2 =18L
4.3.2 Relation between horizontal pipeline diameter and permitted displacement of condensate water
PVC
piping
Inner diameter of
piping(reference
value: mm)
Inner diameter
of piping(mm)
Permitted displacement(1/h)
Remark
Slope 1:50 Slope 1:100
PVC25 19 20 39 27
(Reference value)could not
used for confluence pipe
PVC32 27 25 70 50
PVC40 34 31 125 88
Could be used for
confluence pipe
PVC50 44 40 247 175
PVC63 56 51 473 334
Attention: through converge point need use PVC40 or larger pipe.
4.3.3 Relation between vertical pipeline diameter and displacement of condensate water
PVC
piping
Inner diameter of
piping(reference
value: mm)
Inner diameter
of piping(mm)
Permitted displacement(1/h) Remark
PVC25 19 20 220
(Reference value)could not
used for confluence pipe
PVC32 27 25 410
PVC40 34 31 730
Could be used for
confluence pipe
PVC50 44 40 1440
PVC63 56 51 2760
PVC75 66 67 5710
PVC90 79 77 8280
Attention: through converge point need use PVC40 or larger pipe.
4.3.4 Operation process of concentrated drainage
Install indoor unit → connect drainage pipe → water passing test and overflowing water test → thermal
insulation of drainage pipe
Caution:
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