Nortek GKU18USV4DH - Connection Pipe Requirement

DC Inverter U-match Series Cassette Type Unit
7
freely during heating operation.
(4). Do not place animals and plants in the path of the warm air.
(5). Check the support structure to verify that it has sufficient load-carrying
capacity to support the weight of the unit. Mount the unit securely to reduce
vibration noise.
(6). Provide the space shown in Fig. 3.2, so that the air flow is not blocked. Also
for efficient operation, leave three of four directions of peripheral
constructions open.
Fig. 3.2
3.3 Connection Pipe Requirement
The maximum length of the connection pipe is listed in the Tabl
e below..
Table 3.4
Item
Model
Size of Fitting Pipe
mm (inch)
Max. Pipe
Length
m (feet)
Max. Height
Difference
between Indoor
Unit and
Outdoor Unit
m (feet)
Drainage
pipe(Outer
Diameter × wall
thickness)
mm (inch)
Liquid
Gas
GKU18(5.3)USV4DH
GXH18(5.3)USV4DH
6(1/4)
12.7(1/2)
50(164)
15(49-1/4
)
Φ25×1.5
(Φ1 X 1/16)
GKU24(7.0)USV4DH
GXH24(7.0)USV4DH
9.5(3/8)
16(5/8)
50(164)
15(49-1/4
)
Φ25×1.5
(Φ1 X 1/16)
GKU30(8.8)USV4DH
GXH30(8.8)USV4DH
9.5(3/8)
16(5/8)
50(164)
15(49-1/4
)
Φ25×1.5
(Φ1 X 1/16
)
GKU36(10.6)USV4DH
GXH36(10.6)USV4DH
9.5(3/8)
16(5/8)
50(164)
15(49-1/4
)
Φ25×1.5
(Φ1 X 1/16
)
GKU42(12.3)USV4DH
GXH42(12.3)USV4DH
9.5(3/8)
16(5/8)
50(164)
15(49-1/4
)
Φ25×1.5
(Φ1 X 1/16)