Daikin FXL25LVE [17/56] Explanation of different systems

Daikin FXL40LVE [17/56] Explanation of different systems
• Introduction
5
Systems • Introduction
16
5 Explanation of different Systems
5-2 Inverter cooling only / heat pump systems
EXTENDED REFRIGERANT PIPING
The ability to sustain refrigerant piping in lengths up to 100m (120m equivalent) for K series, 120m for L series, allows systems to be designed with level
differences of 50m between indoor and outdoor units and 15m between individual indoor units. Thus, even with installations in 15 storey buildings, all
outdoor units can be located at rooftop level.
•MODULAR & LIGHTWEIGHT
Modular design enables units to be joined together in rows with an outstanding degree of uniformity.
The design of the outdoor units (from 5HP to 10HP) is sufficiently compact to allow them to be taken up to the top of a building in a commercial elevator,
overcoming site transportation problem, particularly when outdoor units need to be installed on each floor.
UNIFIED REFNET PIPING
The unified Daikin REFNET piping system is especially designed for simple installation and for use with both R-407C and R-22 refrigerants. Only 2 or 3
main refrigerant pipes are necessary per system and unlike conventional water based schemes, VRV systems do not require strainers, stop valves, 2 and
3 way valves, oil traps, anti freeze treatment or air purging.
The use of REFNET piping in combination with electronic expansion valves, results in a dramatic reduction in imbalance in refrigerant flowing between
indoor units, despite the small diameter of the piping. REFNET joints and headers (both accessories) can cut down on installation work and increase system
reliability.
Actual pipin
g
lengt
h
*
1
*
2
(
Plus
)
Inverter Serie
s
L
e
v
e
l
d
iff
e
r
e
n
ce
and outdoor unit
s
between
i
unit
Actual pipin
g
lengt
h
*
1
(Plus) heat recover
y
Serie
s
L
e
v
e
l
d
iff
e
r
e
n
ce
between indoor
and outdoor unit
s
L
e
v
e
l
d
betwe
e
unit
Actual pipin
g
len
g
t
h
Hei
g
ht differenc
e
*
4
*5
NOTES
1 This value is based on the case where the outdoor unit is located above the indoor unit. If the outdoor unit is located underneath the indoor unit
the level difference is a maximum of 40m.
2 The maximum actual piping length between the indoor unit and the first branch is 40m.
3 The BS unit can be located anywhere between the indoor unit and outdoor unit, if installing after the first branch (REFNET JOINT or HEADER), the
piping limit is less than 40m. This value is based on the case where the outdoor unit is located above the indoor unit.
4Equivalent piping length 140m
5 Total length = no special restrictions
Refnet header
Attached insulators for Refnet header

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