Installation Site Requirements Of The Indoor Unit; Preparing Refrigerant Piping; Refrigerant Piping Requirements; To Select The Piping Size - Daikin SERHQ032BAW1 Installer And User Manual

5 Preparation
In places with weak reception, keep distances of 3 m or more to
avoid electromagnetic disturbance of other equipment and use
conduit tubes for power and transmission lines.
5.2.2 Installation site requirements of the
indoor unit
INFORMATION
Also read the following requirements:
▪ General installation
"General safety precautions" chapter.
▪ Service space requirements. See the "Technical data"
chapter.
▪ Refrigerant piping
difference). See further in this "Preparation" chapter.
▪ Provide sufficient space around the unit for servicing and air
circulation.
▪ Make sure the installation site withstands the unit's weight and
vibration.
▪ Make sure the unit is level.
▪ Select the location of the unit in such a way that the sound
generated by the unit does not disturb anyone, and the location is
selected according the applicable legislation.
▪ Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
▪ During installation, avoid the possibility that anybody can climb on
the unit or place objects on the unit.
▪ All piping lengths and distances have been taken into
consideration (see "5.3.3 About the piping length" on
Do NOT install the unit in the following places:
▪ In potentially explosive atmospheres.
▪ In places where there is machinery that emits electromagnetic
waves. Electromagnetic waves may disturb the control system,
and cause malfunction of the equipment.
▪ In places where there is a risk of fire due to the leakage of
flammable gases (example: thinner or gasoline), carbon fibre,
ignitable dust.
▪ In places where corrosive gas (example: sulphurous acid gas) is
produced. Corrosion of copper pipes or soldered parts may cause
the refrigerant to leak.
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
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.
CAUTION
Appliance NOT accessible to the general public, install it in
a secured area, protected from easy access.
This unit is suitable for installation in a commercial and
light industrial environment.
Indoor unit
SEHVX20BAW
SEHVX32BAW
SEHVX40BAW
SEHVX64BAW
▪ Field piping sizes
Installer and user reference guide
12
site requirements. See the
requirements (length, height
page 13).
Gas Liquid
Ø25.4 mm Ø12.7 mm
Ø25.4 mm Ø12.7 mm
Ø25.4 mm Ø12.7 mm
Ø25.4 mm Ø12.7 mm
5.3

Preparing refrigerant piping

5.3.1

Refrigerant piping requirements

NOTICE
The refrigerant R410A requires strict cautions for keeping
the system clean, dry and tight.
▪ Clean and dry: foreign materials (including mineral oils
or moisture) should be prevented from getting mixed
into the system.
▪ Tight: R410A does not contain any chlorine, does not
destroy the ozone layer, and does not reduce earth's
protection against harmful ultraviolet radiation. R410A
can contribute slightly to the greenhouse effect if it is
released. Therefore pay special attention to check the
tightness of the installation.
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
≤15.9 mm
≥19.1 mm
▪ The pipe thickness of the refrigerant piping shall comply with the
applicable legislation. The minimal pipe thickness for R410A
piping must be in accordance with the table below.
Pipe Ø
6.4 mm/9.5 mm/12.7 mm
15.9 mm
19.1 mm/22.2 mm
28.6 mm
34.9 mm
41.3 mm
5.3.2

To select the piping size

Determine the proper size using the following tables and reference
figure (only for indication).
G
L
Indoor unit
Outdoor unit
▪ Piping connection sizes
Outdoor unit
1× SERHQ020BAW1
1× SERHQ032BAW1
2× SERHQ020BAW1
2× SERHQ032BAW1
Temper grade of piping material
O (annealed)
1/2H (half hard)
Minimal thickness t
0.80 mm
0.99 mm
0.80 mm
0.99 mm
1.21 mm
1.43 mm
G1
L1
G2
L2
Gas Liquid
Ø22.2 mm Ø9.52 mm
Ø28.6 mm Ø12.7 mm
Ø22.2 mm Ø9.52 mm
Ø28.6 mm Ø12.7 mm
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1A – 2018.01
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