EAS Electric VRV EVR Series Instruction Manual page 51

Check point of indoor unit
A
B
Check point of outdoor unit
4.3 Heat Insulation
Do the heat insulation to the pipes of air side and liquid side
separately. The temperature of the pipes of air side and liquid side
when cooling, for avoiding condensation please do the heat
insulation fully.
The air side pipe should use closed cell foamed insulation
material, which the fire-retardant is B1 grade and the heat
resistance over 120°C.
When the external diameter of copper pipe≤Φ12.7mm, the
thickness of the insulating layer at least more than 15mm;
When the external diameter of copper pipe≥Φ15.9mm, the
thickness of the insulating layer at least more than 20mm.
Please use attached heat-insulating materials do the heat
insulation without clearance for the connecting parts of the indoor
unit pipes.
The unit body
4.4 Connecting method
Select refrigerant pipe
Table 4-2
pipe definition pipe connect position
The pipe between outdoor unit to the
main pipe
first branch of indoor unit.
The pipe after the first branch do not
The main pipes of
direct connect with the indoor unit.
indoor unit
The branch pipes
The pipe after the branch connect with
of indoor unit
the indoor unit.
The pipes connect with the main pipe、
Indoor unit branch
the branch pipe and the the main pipe
pipes components
of indoor unit.
The first connect methond
Outdoor Unit
L2
L1 B
A
b
a
The first Line Branch Pipe
D
C
Fig. 4-2
Cut from upward
Site pipe side
Affiliated heat pump belt
Fig. 4-3
L2～L5
a,b,c,
d,e,f
A,B,C,
D,E
f
L4
L5
E
L3
D
e
C
d
c
Fig. 4-4
13
The second connect methond
Outdoor Unit(Take Model 280 for example)
L1
The first Line Branch Pipe
The distance between the first branch to the last indoor unit is
more than 15m,choose the second connect methond.
The pipe between the indoor unit to the closest branch must less
than 15m.
4.4 Confirmation for the diameters of indoor
unit connecting pipes
Size of main pipe and corresponding branch joint and branch
header
1) R410A Indoor unit connecting pipes diameters 4-3。
2) Example 1：In the Fig.4-5,The downstream inner units of the
L4,and its total capacity is 45×2＝90，refers to the Table 4.4,the
air/liquid side of L4 is：Φ15.9/Φ9.5。
R410A Indoor unit connecting pipes diameters
Capacity of the
downstream
indoor unit
code
A＜166
166≤A＜230
L1
230≤A＜330
330≤A＜470
4.5 Confirmation for the diameters of outdoor
unit connecting pipes
R410A outdoor unit connecting pipes diameters
Main pipe size when the tot-
Total capa-
al equivalent piping length
ctiy of The
of liquid + gas side is <90m
outdoor
Gas side
units
(mm)
Φ22.2
20-28KW
Φ25.4
33.5KW
The straight distance between copper pipe turning and the contig-
uous branch pipe is at least 0.5m;
The straight distance between the contiguous branchpipes is at
least 0.5m;
The straight distance which the branch pipes connected to the
indoor unit is at least 0.5m;
N
(56)
a
L2
B
A
b N
2
(56)
L3
c
L4
D
C
d
L5
E
f
NOTE
Main pipe size (mm)
Air pipe Liquid pipe
Φ15.9 Φ9.5
Φ19.1 Φ9.5
Φ22.2 Φ9.5
Φ25.4 Φ12.7
Main pipe size when the tot-
al equivalent piping length
of liquid + gas side is ≥90m
Liquid si-
The first Line Gas side Liquid si-
de(mm) Branch Pipe
(mm) de(mm)
EVRI-BP2
Φ9.5 Φ25.4 Φ12.7
EVRI-BP3
Φ12.7 Φ25.4
NOTE
V.2
1
intdoor Units
N
3
(45)
N
4
(45)
e
N
N
5
6
(45) (56)
Fig. 4-5
Table 4-3
Applicable
manifold
EVRI-BP1
EVRI-BP1
EVRI-BP2
EVRI-BP3
Table 4-4
The first Line
Branch Pipe
EVRI-BP3
EVRI-BP3
Φ12.7