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Unit installation
Installer and user reference guide
46
FXMQ-A
VRV system air conditioner
4P701548-1 – 2022.07
▪
Pipe size.
Keep the pipe size equal to or greater than that of the connecting pipe
(vinyl pipe of 25 mm nominal diameter and 32 mm outer diameter).
▪
Slope.
Make sure the drain piping slopes down (at least 1/100) to prevent air
from being trapped in the piping. Use hanging bars as shown.
1~1.5 m
a
a
Hanging bar
Allowed
Not allowed
▪
Condensation.
Take measures against condensation. Insulate the complete drain
piping in the building.
▪
Combining drain pipes.
It is possible to combine drain pipes. Use drain pipes and
T-joints with the correct gauge for the operating capacity of the units.
≥100
a
a
a
T-joint
To connect the drain piping to the indoor unit
NOTICE
Incorrect connection of the drain hose might cause leaks, and damage the
installation space and surroundings.
a b
a
Drain pipe connection
b
Refrigerant pipes
Drain piping connection
1
Pull out the drain plug.
2
Install the adapter for the drain hose (field supply).
3
Push the drain hose as far as possible over the adapter for the drain hose.
4
Tighten the metal clamp until the screw head is less than 4 mm from the
metal clamp part.
5
Check for water leaks (see
6
Install the insulation piece (drain pipe).