Daikin REMQ5T7Y1B, Installation And Operation Manual

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4 Preparation
Installation and operation manual
7
REYQ8~20+REMQ5T7Y1B
VRV IV system air conditioner
4P353996-1E – 2018.04
4 Preparation
4.1 Preparing the 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 is a class A product. In a domestic environment this
product may cause radio interference in which case the
user may be required to take adequate measures.
4.1.2 Additional installation site requirements
of the outdoor unit in cold climates
NOTICE
When operating the unit in a low outdoor ambient
temperature with high humidity conditions, make sure to
take precautions to keep the drain holes of the unit free by
using proper equipment.
In heating:
T
AO
(°C WB)
a b
20
15.5
15
10
5
0
–5
–10
–15
–20
10 15 20 25 27 30
T
AI
(°C DB)
a Warming up operation range
b Operation range
T
AI
Ambient indoor temperature
T
AO
Ambient outdoor temperature
If the unit has to operate for 5 days in this area with
high humidity (>90%), Daikin recommends to install the
optional heater tape kit (EKBPH012T or EKBPH020T) to
keep the drain holes free.
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)
▪ All piping lengths and distances have been taken into
consideration (see About the piping length in the installer
reference guide).
Only use phosphoric acid deoxidised seamless copper.
4.2.2 To select the piping size
Determine the proper size using the following tables and reference
figure (only for indication).
C
A
B
D E
C C
E
a
b
x
y
4 3
1 2
1,2 VRV DX indoor unit
3 BS unit
4 Cooling-only VRV indoor unit
A~E Piping
a,b Indoor branch kit
x,y Outdoor multi connection kit
A, B, C: Piping between outdoor unit and (first)
refrigerant branch kit
Choose from the following table in accordance with the outdoor unit
total capacity type, connected downstream.
Outdoor unit
capacity type (HP)
Piping outer diameter size (mm)
Liquid pipe Suction gas
pipe
High
pressure/low
pressure gas
pipe
5~8 9.5 19.1 15.9
10 9.5 22.2 19.1
12 12.7 28.6 19.1