Design of the Drain Pipe
1. The drain pipe should always keep a downward sloping angle of 5~10° to avoid water
accumulation or improper drainage which could lead to equipment and/or property damage.
2. When connecting the drain pipe to the unit, avoid excessive force on the connection. The pipe
should be as close to the unit as possible.
3. The drain pipe can be ordinary hard PVC pipe which can be purchased locally. During the
connection, insert the end of the PVC pipe to the drain outlet, then tighten it to the drain hose
with a hose clamp. Do not connect the drain outlet and the drain hose with an adhesive.
4. When the drain pipe is used for multiple units, the joined section of the pipe should be 3.9
inches (100mm) lower than the drain hole of each device and it is suggested to use a larger
diameter pipe when connecting multiple units.
Installation of the Drain Pipe
1. The diameter of the drain pipe should be greater than or equal to that of the refrigerant pipe.
(PVC pipe, outer diameter : 1 inch (25mm), wall thickness
≥
0.05 inches (1.5mm).
2. The drain pipe should be as short as possible and with at least a 1/100 degree of slope to
avoid forming air pockets.
3. If the proper degree of slope of the drain pipe is not feasible, a lift bracket should be installed.
4. A distance of 39.4 to 59 inches (1 to 1.5m) should be kept between the hangers to avoid the
drain hose sagging or bending
1~1.5m
39.4-59 inch
CORRECT
INCORRECT with sagging and bending of pipe
14
Ceiling Concealed Unit
