MULTI/SINGLE
7. Installation
7.4 Indoor Unit Drain Piping
7.4.1 Drain piping of indoor unit with drain pump
•
Drain piping must have down-slope (1/50 to 1/100). Be sure not to provide up-and-down slope to prevent
reversal flow.
•
During drain piping connection, be careful not to exert force on the drain port on the indoor unit.
•
The outside diameter of the drain connection on the indoor unit is 32 mm (1-1/4 inch).
– Piping material: Use the Polyvinyl chloride pipe, 25 mm (1 inch) pipe fittings.
Pipe clamp
Indoor unit
Maintenance
drain port
※ According to type of indoor unit, external appearance could be different.
•
Possible drain head height is upto 700 mm (27-6/19 inch). So the drain head should be installed below 700 mm
(27-6/19 inch).
•
Be sure to install heat insulation on the drain piping.
– Heat insulation material: Polyethylene foam with thickness more than 8 mm (5/16 inch).
Drain Pipe
※ According to type of indoor unit, external appearance could be different.
18
Indoor unit
Upward
routing
not allowed
1/50~1/100
1/50~1/100
Maximum 700mm
(27-9/16 inch)
Drain Pump
Ceiling concealed duct - Low static pressure
Max 300mm
Metal
clamp
Insulation
※ According to type of indoor unit, external appearance could be different.
Unit
Hanger
distance
Hanger bracket
1~15m
1/50~1/100 slope
Flexible drain hose
Thermal insulation
(Local supply)
Drain pipe
(Local supply)
Elbow
Drain pump
