5 Preparation
Installer reference guide
8
AZQS100~14 AZQS100~140B7Y1B
Split system air conditioners
4P3855291 – 2014.08
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.
a
b
c
c
d
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
(Ø)
Temper grade
Thickness (t)
(a)
6.4 mm (1/4")
9.5 mm (3/8")
12.7 mm (1/2")
Annealed
≥0.8 mm
t
Ø
15.9 mm (5/8")
Annealed
≥1.0 mm
19.1 mm (3/4")
Half hard
(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
Ø9.5 mm
L1 gas piping
Ø15.9 mm
Refrigerant piping length and height difference
The piping length and height difference must comply with the
following requirements:
H1
L1
Total oneway piping length:
5 m≤L1≤50 m (70 m)
(a)
Height difference between the highest
indoor unit and the outdoor unit:
H1≤30 m
(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
temperature
Humidity
Minimum thickness
≤30°C
75% to 80% RH
15 mm
>30°C
≥80% RH
20 mm
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
"6.7.5 Specifications of standard wiring
components" on page 18
.
WARNING
▪ If the power supply has a missing or wrong Nphase,
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 highpressure 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.
WARNING
▪ All wiring must be performed by an authorized
electrician and must comply with the applicable
legislation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on the site and all electrical
construction
must
comply
with
the
applicable
legislation.
WARNING
ALWAYS use multicore cable for power supply cables.
