Specifications

837
FDC-HKX
(c) Duct installation
1 Supply air duct
Same as FDR series. Refer to page 831.
2 Access door
Access door must be provided without fail.
● Dimensions of access door and service space
( See exterior dimensions in page 740 to 742.)
3 Return air port
An air filter is not included in the indoor unit. Use the return air port with air filter.
4 Return air duct: Use square duct.
5 Return air port with canvas duct
1) Connection of intake and exhaust ducts.
2) Duct connecting position.
< Fresh air intake >
a) Use side air intake port.
b) In case of simultaneous intake and exhaust, the side air intake port cannot be used, therefore, take air from the midway air intake
port along the intake duct.
< Exhaust > Make sure to use suction as well.
c) Use a side exhaust port.
3) Duct connection
Use intake and exhaust duct flange of separately sold (for connection of
⭋125mm round duct) to connect
⭋125mm round duct. The duct clamped by bands must be thermally insulated to prevent dew condensation.
4 Return air duct
(to be purchased locally)
1 Supply air duct
(to be purchased locally)
5 Return air port
with canvas duct
(to be purchased
locally)
3 Return air port
(to be purchased locally)
Supply air port
(to be purchased locally)
Heat insulation
Indoor unit
2 Access door
Looking from top of unit
Exhaust port
Side fresh air intake port
Intake duct
(square duct)
Fresh air intake
port midway
of return duct
Fig.2Fig.1