Kaysun KMF-400 DN3, Installation Manual

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5.5 Examples
The do wnstream inner units of the main pipe L2 are N1, N2, and
its total capacity is 80×2=160, the size of pipe L2 isΦ15.9/Φ9.5,
and the branch pipe B should be FQZHN-01C.
The downstream inner units of the main pipe L4 are N3, N4, and
its total capacity is 71×2=142, the size of pipe L4 isΦ15.9/Φ9.5,
and the branch pipe D should be FQZHN-01C.
Outdoor unit
N
1
(80)
The downstream inner units of the main pipe L5 are N5, N6, and
its total capacity is 71×2=142, the size of pipe L5 isΦ15.9/Φ9.5,
and the branch pipe E should be FQZHN-01C.
The indoor unit below to the main pipe L3 are N3
～
N6, and its
total capacity is 71×4=284, the size of pipe L3 isΦ22.2/Φ9.5,
and he branch pipe C should be FQZHN-02C.
The indoor unit below to the main pipe A are N1
～
N6, and its
total capacity is71×4+80×2=444, and the branch pipe should be
FQZHN-02C, and because the total piping length of air
side is ≥90m, check Table.5-5, and the first branch pipe should
apply FQZHN-03C, and according to the principle of maximum
value, it should apply FQZHN-03C.
(450)
a
Indoor unit
L
2 L
1
B
A
b
N
2
(80)
N
3
(71) L
3
c
L
4
L
5
First manifold
D
N
4
(71)
C
d
e
E
f
N
5
N
6
(71)
(71)
3. Main pipe (please refer to Table 5-5 and Table 5-7)
In Fig.5-5 , main pipe L1, its outdoor unit capacity is 45kW. Its
gas/liquid pipe diameter is Φ25.4/Φ12.7 according to Table 5-7.
Because total piping length of air side is ≥90m, according
to Table 5-5, its gas/liquid side is Φ28.6/Φ12.7. By maximum
principle, adopt Φ28.6/Φ12.7.
Fig.5-5
CAUTION
Suppose in the displayed piping system, the total equivalent
piping length of air side + liquid side is longer than 90m.
Connecting method
Table 5-10
Gas side Liquid side
Flare/welding
Flare/welding
1. Indoor unit branch pipe
Outdoor unit 40kW
Outdoor unit 45kW
Flare/welding
Flare/welding
Inner branch pipes are a~f, the size selection please refers to
Table 5-6. Note: The max. length of the branch pipe should not
longer than 15m.
Indoor unit
Manifold
Flare Flare
2. The main pipes of indoor unit and the indoor unit branch pipe
components
Flare/welding Flare/welding
Allowable length and altitude difference of refrigerant pipe
Table 5-11(Liquid side pipe only)
Piping
Pimitted value
Total Pipe Length(Actual) ≤250m
≤100m
≤120m
L1+L2+L3+L4+L5+a+b+c+d+e+f
Maximum
Piping(L) Actual Length
Equivalent Length
L1+L2+L3+L4+L5+f (The first connect methond)
or L1+L3+L5+f (The second connect methond)
Pipe Length(from the first line branch
pipe to the furhtest indoor unit)(m) L2+L3+L4+L5+f (The first connect methond)
or L3+L5+f (The second connect methond)
≤40m
≤15m
40 kW
45 kW
Pipe Length(from the nearest branch
pipe equivalent length(m)
a,b,c,d,e,f
Outdoor Unit up ≤30m
≤20m
≤8m
Indoor Unit-Outdoor
Unit Drop Height(H)
Indoor Unit Down
Indoor Unit to Indoor Unit Drop Heihgt(H)
CAUTION
When the total equivalent piping length of gas side is ≥90m, it must increase the size of air side main pipe.
Besides, according to the distance of refrigerant pipe and the over matched state of inner unit, when the capacity is decreasing it still can
increase the gas side main pipe size.
installation manual