Drain Piping And Water Supply Work - Daikin VAM-FA8VE Technical Data Manual

• HRV • VKM-GA(M)V1
(6) Attach the accessory duct connecting flanges using the included screws to the outlet and intake
holes (a total of four).
When attaching, make sure the alignment markings on the unit match up with the triangle on the each
duct connecting flange. (Refer to Fig. 6)
9.5

Drain Piping and Water Supply Work

(1) Install the drain piping.
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Do not connect the drain piping directly to sewage pipes that smell of ammonia. The ammonia in the
sewage might enter the indoor unit through the drain pipes and corrode the heat exchanger
(Direct expantion coil).
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Water accumulating in the drain piping can cause the drain to clog.
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• HRV • Heat Reclaim Ventilation
Duct connecting flange marking
Unit alignment
(RA is a φ3 indentation)
Make sure the drain works properly.
In case of the direct duct connection system, there is negative pressure inside the unit relative to
atmospheric pressure when the unit is running, so be sure to provide drain frap on the drain outlet.
(See Fig. 7-1)
CAUTION
Keep the drain pipe short and sloping downwards at a gradient of at least 1/100 to prevent air pockets
from forming. (Refer to Fig. 7-2)
If converging multiple drain pipes, install according to the procedure shown below.
(Install a drain trap for each indoor unit.)
(Install with a downward slope of at least 1/100)
CAUTION
The diameter of the drain pipe should be greater than or equal to the diameter of the connecting pipe.
(pipe size: PT3/4B)
When piping passes indoors, always insulate it all the way to the base of the drain socket.
In areas where freezing may occur, always take steps to prevent the pipes from freezing.
Make sure water doesn't leak from the drain pipes.
Avoid bends and curves in the pipes to prevent them getting clogged.
If you are using central drain piping, follow the procedure outlined in the figure 7-2.
Select central drain pipes of proper size according to the capacity of the connected unit.
Make sure the tip of the drain pipes opens out into a location where the drainage can be safely
processed.
Screws (accessory)
(6pcs.×4, total 24pcs.)
Duct connecting
flange
Duct connecting flange
Attached drain hose
Bottom of unit
Central drain piping
2
9
Fig. 6
Fig. 7-1
Fig. 7-2
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