Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates; Preparing Refrigerant Piping; Refrigerant Piping Requirements; Refrigerant Piping Insulation - Daikin AZAS71M2V1B Installer's Reference Manual

5 Preparation
5.2.2 Additional installation site requirements
of the outdoor unit in cold climates
Protect the outdoor unit against direct snowfall and take care that the
outdoor unit is NEVER snowed up.
c
a Snow cover or shed
b Pedestal (minimum height=150 mm)
c Prevailing wind direction
d Air outlet
5.3

Preparing refrigerant piping

5.3.1

Refrigerant piping requirements

INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
Refrigerant piping material
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping temper grade and thickness:
Outer diameter Temper grade
(Ø)
6.4 mm (1/4") Annealed (O)
9.5 mm (3/8")
12.7 mm (1/2")
15.9 mm (5/8") Annealed (O)
19.1 mm (3/4") Half hard (1/2H)
(a) Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
▪ Flare connections: Only use annealed material.
Refrigerant piping diameter
Use the same diameters as the connections on the outdoor units:
L1 liquid piping
L1 gas piping
Refrigerant piping length and height difference
The piping length and height difference must comply with the
following requirements:
Installer reference guide
10
a
c
b
(a)
Thickness (t)
Ø
≥0.8 mm
t
≥1.0 mm
Ø9.5 mm
Ø15.9 mm
L1
Requirement
1 Minimum total one‑way piping
length
2 Maximum total one‑way piping
length
3 Maximum height between indoor
and outdoor
(a) Parenthesised figure represents the equivalent length.
5.3.2

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 120°C
▪ Insulation thickness
Ambient Humidity
temperature
≤30°C 75% to 80% RH
>30°C ≥80% RH
5.4

Preparing electrical wiring

5.4.1

About preparing electrical wiring

INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
INFORMATION
Also read "6.7.5 Specifications of standard wiring
components" on page 20.
WARNING
▪ If the power supply has a missing or wrong N-phase,
equipment might break down.
▪ Establish proper earthing. Do NOT earth the unit to a
utility pipe, surge absorber, or telephone earth.
Incomplete earthing may cause electrical shock.
▪ Install the required fuses or circuit breakers.
▪ Secure the electrical wiring with cable ties so that the
cables do NOT come in contact with sharp edges or
piping, particularly on the high-pressure side.
▪ Do NOT use taped wires, stranded conductor wires,
extension cords, or connections from a star system.
They can cause overheating, electrical shock or fire.
▪ Do NOT install a phase advancing capacitor, because
this unit is equipped with an inverter. A phase
advancing capacitor will reduce performance and may
cause accidents.
Limit
Limit≤L1 5 m
(a)
L1≤Limit 30 m (50 m)
H1≤Limit 30 m
Minimum thickness
15 mm
20 mm
AZAS71~140M_V1+Y1
Sky Air Active-series
4P486048-1A – 2017.08