33
Piping System
⑥
Pipe after rst branch (2 pipes portion)
Total Indoor
Unit (kBtu/h)
Gas
(Φin.(mm))
Liquid
(Φin.(mm))
Branch
Pipe Model
Q < 54 5/8(15.88) 3/8(9.53)
HFQ-102F
54≤ Q < 86 3/4(19.05) 3/8(9.53)
86≤ Q < 114 7/8(22.2) 3/8(9.53)
114≤ Q < 154 1-1/8(28.6) 1/2(12.7)
HFQ-162F
154≤ Q < 170 1-1/8(28.6) 1/2(12.7)
170≤ Q < 250 1-1/8(28.6) 5/8(15.88) HFQ-242F
250≤ Q < 344 1-1/4(31.75) 3/4(19.05)
HFQ-302F
344≤ Q < 544 1-1/2(38.1) 3/4(19.05)
544≤ Q < 552 1-5/8(41.3) 7/8(22.2)
HFQ-462F
552≤ Q < 654 1-3/4(44.5) 7/8(22.2)
654≤ Q 2(50.8) 1-1/8(28.6) HFQ-682F
⑦
Pipe between last branch and indoor unit (2-pipe portion)
4-Way Cassette Type and Mini 4-Way Cassette Type
Indoor Unit
(kBtu/h)
Air pipe
(Φin.(mm))
Liquid pipe
(Φin.(mm))
05~19 1/2(12.7) 1/4 (6.35)
22~54 5/8(15.88) 3/8(9.53)
Others
Indoor Unit
(kBtu/h)
Air pipe
(Φin.(mm))
Liquid pipe (Φin.
(mm))
05~17 1/2(12.7) 1/4 (6.35)
18 5/8(15.88) 3/8(9.53)
19 5/8(15.88) 1/4(6.35)
22~54 5/8(15.88) 3/8(9.53)
NOTE:
(1) When the liquid piping length is longer than 49.2ft.(15m),
use Φ3/8in.(9.53mm) pipe and reducer (eld-supplied)
instead of Φ1/4in.(6.35mm)pipe.
(2) The pipe diameter should be the same as the indoor unit
piping connection size.
Piping Branch Restrictions
In the case that the piping length from the rst branch to the farthest indoor unit (L2) is over 131.2ft.(40m), follow the
instructions below when performing the eld-supplied piping work.
Example 1: Installation with Main Piping Branch
In the case that piping length from the rst branch to the terminal indoor units is within 131.2ft.(40m)-295.3ft.(90m).
(1) If the piping length L2 is over 131.2ft.(40m), the diameter of gas and liquid lines “b and c” or “g and h” should be
increased by one size with reducers (eld-supplied).If (a) is smaller than (b) after increasing the size, increase the size of
(a) to the same size as (b).
(2) The dierence between the piping length from the rst branch to the farthest indoor unit and the piping length from the
rst branch to the nearest indoor unit must be within 131.2ft.(40m).
Example 2: Installation without Main Piping Branch
In the case that piping length from the rst branch to the terminal Indoor Units is within 131.2ft.(40m)-295.3ft.(90m),
(1) If the piping length L2 is over 131.2ft.(40m), the diameter size of gas and liquid lines “b, d and f” should be increased by
one size with reducers (eld-supplied). If (a) is smaller than (b) after increasing the size, increase the size of (a) to the
same size as (b).
(2) The dierence between the piping length from the rst branch to the farthest indoor unit and the piping length from the
rst branch to the nearest indoor unit must be within 131.2ft.(40m).
To Next Page
Loading...
Need help?
General
