Carrier X-POWER Series Service Manual page 121

Carrier service manual R410a DC Inverter 60Hz
1) Increase drainage point as much as possible and reduce quantity of connected indoor units, to ensure
horizontal main drainage pipe not be too long.
2) Units with drainage pump and natural drainage shall converge to different drainage system
separately.
3) Add two elbows at air outlet, and make sure its mouth faces down to prevent dirt and so on dropping
into pipe to create blockage.
4.4 Lifting of Drainage Pipe (for the Unit with Lift Pump)
4.4.1 Installation of lift pipe
1. When connecting drainage pipe with indoor unit, use pipe clamp shipped with unit to fix. Glue splicing
is not permitted for ensuring convenience in repairing.
2. To ensure 1/100 slope, total lift height of drainage pipe (H) shall depend on indoor unit's pump, and do
not set vent pipe on the lifting pipe section. After lifting vertically, immediately place down inclined,
otherwise it will cause error operation of switch at water pump. The connecting method is shown as
follows:
Note: Air outlet could not be installed on the lifting part; otherwise water shall be discharged to ceiling or
could not be discharged.
4.5 Overflowing Water Test and Water Passing Test
4.5.1 Overflowing water test
After finishing the construction of drainage pipe system, fill the pipe with water and keep it for 24 hours to
check whether there is leakage at joint section.
4.5.2 Water passing test
1. Natural drainage mode
Infuse water-containing plate with above 600ml water through check port slowly, and observe
transparent hard pipe at drainage outlet to confirm whether it can discharge water.
2. Pump drainage mode
1) Remove plug of water level switch, remove water-finding cover and slowly infuse water-containing
plate with about 2000ml water through water-finding port to prevent touching the motor of drainage
pump.
Installation 139