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6
Preparation
Installer reference guide
21
ERLQ004~008CA + 08S18CA3VF
Daikin Altherma low temperature split
4P3662261 – 2014.01
6.1.3
Installation site requirements of the
indoor unit
▪ Mind the following measurements guidelines:
Maximum refrigerant piping length between indoor
unit and outdoor unit
30 m
(a)
Minimum refrigerant piping length between indoor
unit and outdoor unit
3 m
Maximum height difference between indoor unit and
outdoor unit
20 m
(a)
Check the outdoor unit installation manual.
▪ Mind the following spacing installation guidelines:
>500
>10
>10
(mm)
Do NOT install the unit in places such as:
▪ Where there is mist of mineral oil, oil spray or vapour.
Plastic parts may deteriorate, and cause them to fall out or water
to leak.
▪ Sound sensitive areas (e.g. near a bedroom and the like), so that
the operation noise will cause no trouble.
▪ The foundation must be strong enough to bear the weight of the
unit. Take the weight of the unit with a domestic hot water tank full
of water into account.
Make sure, in the event of a water leak, water cannot cause any
damage to the installation space and surroundings.
▪ In places with high humidity (max. RH=85%), for example a
bathroom.
▪ In places where frost is possible. Ambient temperature around the
indoor unit should be >5°C.
▪ The indoor unit is designed for indoor installation only and for
ambient temperatures ranging 5~30°C in heating mode.
6.2
Preparing refrigerant piping
6.2.1
Refrigerant piping requirements
▪ Use piping with annealed temper grade, in function of the pipe
diameter.
▪ The minimal pipe thickness should comply with applicable
legislation. The minimal pipe thickness for R410A piping must be
in accordance with the following table.
Pipe for…
Outer diameter
(Ø)
Pipe thickness
(t)
Liquid
6.4 mm (1/4")
≥0.8 mm
t
Ø
Gas
15.9 mm (5/8")
≥1.0 mm
6.2.2
Refrigerant piping insulation
▪ Use polyethylene foam as insulation material:
▪ with a heat transfer rate between 0.041 and 0.052 W/mK (0.035
and 0.045 kcal/mh°C)
▪ with a heat resistance of at least 110°C
▪ Insulation thickness
Pipe outer diameter
(Ø
p
)
Insulation inner
diameter (Ø
i
)
Insulation thickness
(t)
6.4 mm (1/4")
8~10 mm
10 mm
15.9 mm (5/8")
16~20 mm
13 mm
Ø
i
Ø
i
t
Ø
p
Ø
p
6.3
Preparing water piping
6.3.1
Water circuit requirements
▪ Use the indoor unit ONLY in a closed water system.
Using the system in an open water system will lead to excessive
corrosion.
▪ The maximum water pressure is 4 bar.
Provide adequate safeguards in the water circuit to ensure that
the maximum pressure is NOT exceeded.
▪ All installed piping and piping accessories (valve, connections,…)
must withstand the following temperatures:
INFORMATION
The following illustration is an example and may NOT
match your system layout.
M
M
FCU1
FCU2
FCU3
FHL1
FHL2
FHL3
a
b
c
d
e
f
g
f
h
i
i
i
i
j
k
89°C
65°C
a
Outdoor unit
b
Indoor unit
c
Heat exchanger
d
Backup heater
e
Pump
f
Stop valve
g
Motorised 3way valve
h
Motorised 2way valve (field supply)
i
Collector
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