4. checking the Drainage and forming the pipings
1) Checking the drainage
1. To check the drainage.
■Pour a glass of water on the evaporator.
■Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit.
2. Drain piping
■The drain hose should point downward for easy drain flow.
Downward slope
■Do not make drain piping.
| Do not raise |
| Accumulated |
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| drain water |
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| Tip of drain hose |
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| Air |
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| dipped in water | |
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| 50mm gap | |
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Water |
| Water | Waving | Water |
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leakage |
| leakage | leakage | Ditch |
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2) Form the piping
1.Form the piping by wrapping the connecting por- tion of the indoor unit with insulation material and secure it with two kinds of vinyl tapes.
■If you want to connect an additional drain hose, the end of the drain outlet should be routed above the ground. Secure the drain hose appropriately.
2.In cases where the outdoor unit is installed below the indoor unit perform the following.
■Tape the piping, drain hose and connecting cable from down to up.
■Secure the tapped piping along the exterior wall using saddle or equivalent.
Seal small openings around pipings with a gum type sealer.
Taping
Drain hose
Pipings
Connecting cable
Trap is required to prevent water from entering into electrical parts.
3.In cases where the Outdoor unit is installed above the Indoor unit perform the following.
■Tape the piping and connecting cable from down to up.
■Secure the taped piping along the exterior wall. Form a trap to prevent water entering the room.
■Fix the piping onto the wall by saddle or equivalent.
Seal a small opening around the pipings with gum type sealer.
Trap
Trap
