Daikin FCAHG140FVEB [9/36] Preparing refrigerant piping
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Daikin FCAHG140FVEB [9/36] Preparing refrigerant piping

Daikin FCAHG140FVEB [9/36] Preparing refrigerant piping
5 Preparation
Installer and user reference guide
9
FCAHG71~140FVEB
Split system air conditioners
4P429475-1 – 2015.12
▪ Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
▪ Choose a location where the hot/cold air discharged from the unit
or the operation noise, will NOT disturb anyone.
▪ Air flow. Make sure nothing blocks the air flow.
▪ Drainage. Make sure condensation water can be evacuated
properly.
▪ Paper pattern for installation (upper part of packing)
(accessory). When selecting the installation location, use the
paper pattern. It contains the dimensions of the unit and the
required ceiling opening.
▪ Air flow directions. You can select different air flow directions.
Choose the one best suited for the room. Also make sure the "Air
flow direction" field setting corresponds with the actual situation
(see "7.1Field settings"on page16).
Example:
1
2
3
4
1
2
3
4
1
2
3
a b c
a All-round air flow
b 4-way air flow (with closed corners) (optional blocking pad
kit required)
c 3-way air flow (optional blocking pad kit required)
▪ Ceiling insulation. When conditions in the ceiling exceed 30°C
and a relative humidity of 80%, or when fresh air is inducted into
the ceiling, then additional insulation is required (minimum 10mm
thickness, polyethylene foam).
▪ Spacing. Mind the following requirements:
(mm)
≥1500
≥
2000
≥
4000
≥1500
A
B
C
ba dac
A Minimum distance to the wall (see below)
B Minimum and maximum distance to the floor (see below)
C ≥298mm: In case of installation with standard decoration
panel
≥348mm: In case of installation with fresh air intake kit
≥378mm: In case of installation with self-cleaning
decoration panel
a Indoor unit
b Lighting (the figure shows ceiling-mounted lighting, but
recessed lighting is also allowed)
c Air fan
d Static volume (example: table)
▪ A: Minimum distance to the wall. Depends on the air flow
directions towards the wall.
≥1500 ≥500 ≥200
a
A A A
b c
a Air outlet and corners open
b Air outlet closed, corners open (optional blocking pad kit
required)
c Air outlet and corners closed (optional blocking pad kit
required)
▪ B: Minimum and maximum distance to the floor:
▪ Minimum: 2.5m to avoid accidental touching.
▪ Maximum: Depends on the air flow directions and the capacity
class. Also make sure the "Ceiling height" field setting
corresponds with the actual situation. See "7.1 Field
settings"on page16.
If air flow direction… Then B
FCAHG71 FCAHG100~140
All-round ≤3.5m ≤4.2m
4-way
(a)
≤4.0m ≤4.5m
3-way
(a)
≤3.5m ≤4.2m
(a) Optional blocking kit required
Do NOT install the unit in the following places:
▪ 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.
It is NOT recommended to install the unit in the following places
because it may shorten the life of the unit:
▪ Where the voltage fluctuates a lot
▪ In vehicles or vessels
▪ Where acidic or alkaline vapour is present
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)
9.5mm (3/8") Annealed (O) ≥0.8mm
t
Ø
15.9mm (5/8") Annealed (O) ≥1.0mm
(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
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

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