Toshiba Carrier MMC-AP0181H2UL, Инженерный справочник

Страница: 25 / 213

3
Refrigerant piping design
24
3-2. Allowable length/height difference of
refrigerant piping
3-2-1. Heat recovery
System restrictions Caution for installation
Allowable length and height difference of refrigerant piping
*1: If “Medium Static Ducted Type (MMD-AP***BH)” is included in the system: Total indoor capacity code must be between 80% and 120% of the capacity of the outdoor unit.
*2: Farthest outdoor unit from the first branching section: Follower unit (C). Farthest indoor unit from the first branching section: indoor unit (o).
*3: If FS unit is connected to multiple indoor units, connect wires of FS unit to one of the indoor unit with main remote control.
*4: Allowable values for length equivalent to furthest pipe are shown below and they vary according to capacity rank of outdoor unit.
072 to 120 type: Equivalent length 605 ft (185 m), Actual length: 540 ft (165 m)
144 to 240 type: Equivalent length 640 ft (195 m), Actual length: 575 ft (175 m)
2
8
8 to 336 type: Equivalent length 656 ft (200 m), Actual length: 591 ft (180 m)
Max. No. of combined outdoor units 3 units Note 1) Install the outdoor units in order of their capacity codes. A (header unit) ≥ B ≥ C
Note 2) The header unit is connected to the branching joint for outdoor unit which is
directly connected to the main pipe.
Note 3) Y-shaped branching joint must be installed horizontally.
Note 4) Make sure to connect the T-shaped branching joint of liquid pipe as <Fig1>.
Do not connect the T-shaped branching joint as <Fig2>.
Max. capacity of combined outdoor units 28 ton
Max. No. of connected indoor units 48 units
Max. capacity of combined indoor units
H2 ≤ 49 ft (15 m) 125% (*1)
H2 > 49 ft (15 m) 105%
Allowable value (ft (m)) Pipes
Pipe length
Total extension of pipe (Liquid pipe) Actual length 985 (300)
La + Lb + Lc + LA + L1 + L2 +L3 + L4 + L5 + L6 + L7 + L8 +
a + b + c + d + e + f + g + h + i + j + k + l + m + n + o
Farthest piping length L (*2)(*4)
Equivalent length 656 (200)
Lc + LA + L1 + L3 + L4 + L5 + L6 + L7 + o
Actual length 591 (180)
Main piping length
H2 > 9.8 ft (3 m)
Equivalent length 330 (100)
L1
Actual length 280 (85)
H2 ≤ 9.8 ft (3 m)
Equivalent length 395 (120)
Actual length 330 (100)
Farthest equivalent piping length from the first
branch Li (*2)
H1 > 9.8 ft (3 m) 165 (50)
L3 + L4 + L5 + L6 + L7 + o
H1 ≤ 9.8 ft (3 m) 215 (65)
Farthest equivalent piping length between outdoor units LO (*2) 49 (15) Lc + LA (Lb + LA)
Maximum equivalent piping length of pipes connected to outdoor units 33 (10) La, Lb, Lc
Maximum actual length of pipes connected to indoor units 98 (30) a + f, b + g, c + h, d + i, e + j, k, l
Maximum actual length between FS unit and indoor unit 49 (15) f, g, h, i, j
Maximum equivalent length between branching sections 165 (50) –
Height difference
Height between outdoor and indoor units H1
Upper outdoor units 165 (50) –
Lower outdoor units 98 (30) –
Height between indoor units H2
Upper outdoor units 130 (40) –
Lower outdoor units 9.8 (3) –
Height between outdoor units H3 0.3 (0.1) –
<In case of two or more indoor units are connected with FS unit>
Max. equivalent piping length in group of the FS unit 98 (30) L5 + L6 + m, L5 + L6 + L7 + n, L5 + L6 + L7 + o
Maximum actual length between FS unit and the wired indoor unit (*3) 49 (15) L6 + m, L6 + L7 + n, L6 + L7 + o
Height difference between indoor units in same FS unit H4 1.6 (0.5) –
La
Height difference
between indoor units
in same FS unit:
H4
≤ 1.6 ft (0.5 m)
Height difference between indoor units:
H2 ≤ 130 ft (40 m)
(If the outdoor unit is installed in
a higher position than indoor unit)
Height difference
between outdoor units
H3 ≤ 0.3ft (0.1 m)
Main
piping
L1
Branching pipe
L2
(a)
Indoor unit connecting pipe
FS unit
Farthest equivalent piping length
between outdoor units: LO ≤ 49 ft (15 m)
Outdoor units
(b)
(c)
Header unit(A) Follower unit(B)
Follower unit(C)
Lb Lc
LA
First branching
section
a
b
L8
c
Indoor unit
f
g h
FS unit
k l
Y-shape branching joint
FS unit
H4
H2
o n
(o)
(n) (m)
m
L7
L6 L5
L4
e
j
i
Branching header
(Cooling only)
Indoor unit
FS unit
FS unit
FS unit
Max.equivalent piping length in group of the FS unit:
Ln
≤ 98 ft (30 m)
The longest piping length from the first branchi: Li ≤ 215 ft (65 m)
The longest piping length:
L
≤ 656 ft (200 m)
L3
H3
FS unit connecting pipe
Height difference
between outdoor
and indoor units:
H1 ≤ 165 ft (50 m)
(If the outdoor unit is
installed in a higher
position than indoor unit)
H1
d
Branching joint
for outdoor units
(Cooling only)