4 Preparation
Installation and operation manual
7
RWEYQ8~RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452190-1A – 2017.04
3.2
System layout
Heat recovery system
k
m
e
c
k
l
e
e
e
f
h
b
a
k
l
c
c
k
k
k
j
c
e
i
k
k
c
d
1
3
2
5
4
e
g
c
a
Unit
b
Refrigerant piping
c
BS unit
d
Multi BS unit
e
VRV DX indoor unit
f
LT Hydrobox unit
g
Cooling only VRV indoor unit
h
HT Hydrobox unit
i
EKEXV kit
j
AHU
k
User interface
l
Wireless user interface
m
Water system connection
Heat pump system
g
c
g
g
h
g
g
c
c
c
d
f
e
i
j
b
a
a
Unit
b
Refrigerant piping
c
VRV DX indoor unit
d
LT Hydrobox unit
e
BP box (required to connect Residential Air (RA) or Sky Air
(SA) direct expansion (DX) indoor units)
f
Residential Air (RA) direct expansion (DX) indoor units
g
User interface
h
Wireless user interface
i
Cool/heat changeover remote control switch
j
Water system connection
Water system
c
g
d
f
e
b
a
a
Unit
b
Connection to refrigerant system
c
Water piping
d
Dry cooler
e
Brine loop
f
Closed cooling tower
g
Boiler
4
Preparation
4.1
Preparing installation site
4.1.1
Installation site requirements of the
outdoor unit
Mind the spacing guidelines. See the "Technical data" chapter.
CAUTION
Appliance not accessible to the general public, install it in a
secured area, protected from easy access.
This unit, both indoor and outdoor, is suitable for
installation
in
a
commercial
and
light
industrial
environment.
NOTICE
This equipment is compliant with Class A of EN55032/
CISPR 32. In a residential environment this equipment
may cause radio interference.
4.2
Preparing refrigerant piping
4.2.1
Refrigerant piping requirements
NOTICE
Refrigerant R410A requires strict cautions for keeping the
system clean and dry. Foreign materials (including mineral
oils or moisture) should be prevented from getting mixed
into the system.
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
▪ Temper grade: use piping with temper grade in function of the
pipe diameter as listed in table below.
Pipe Ø
Temper grade of piping material
≤15.9 mm
O (annealed)
≥19.1 mm
1/2H (half hard)
