Use and Care Manual

4.5.3 Precautions When Using a Riser Pipe Type Drain System

(1). Make sure that the entire drain pipe is completely insulated to prevent any

possible water leakage due to condensation.

1). Connect drain pipe to the riser pipe, and insulate completely.

2). Connect unit drain outlet/port to the riser pipe, and insulate completely.

Drain lift pipe

≤1000mm(39-3/8inch)

≤300mm(11-3/4inch)

1~1.5m

(39-3/8~59inch)

Fig. 4.27

(2). Make sure the riser pipe is 280mm (11inch) maximum.

(3). Stand the riser pipe vertically, and make sure it is not further than 300mm (12inch) from

the base of the drain outlet.

(4). Secure a downward gradient of 1/100 or more for the drain hose. To accomplish this, mount

supporting brackets at an interval of 1~1.5 m(40-60inch).

1-1.5 m

(40 - 60inch)

(wrong)

(Correct) 1/100 or more gradient

Fig. 4.28

(5). The incline of attached drain hose should be 75mm(3inch) or less so that the drain outlet

does not have to withstand additional force.

below75mm(3inch)

below1000mm(40inch)

Drain hose(attachment)

Fig. 4.29

4.5.4 Testing of Drain Piping

After piping work is nished, verify water flow.

Shown in the Fig. 4.30, add approximately 1 liter or 1 quart of water slowly into the unit drain pan

and check drainage ow under COOL mode.

U-match Series Cassette Type Unit