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8 Preparation
Installer reference guide
26
EJHA EHY32AA
Daikin Altherma Hybrid hydrosplit heat pump
4P531180-1 – 2018.06
WARNING
▪ Do NOT pierce or burn.
▪ Do NOT use means to accelerate the defrosting
process or to clean the equipment, other than those
recommended by the manufacturer.
▪ Be aware that R32 refrigerant does NOT contain an
odour.
WARNING
The appliance shall be stored so as to prevent mechanical
damage and in a well-ventilated room without continuously
operating ignition sources (example: open flames, an
operating gas appliance or an operating electric heater).
WARNING
Make sure installation, servicing, maintenance and repair
comply with instructions from Daikin and with applicable
legislation (for example national gas regulation) and are
executed only by authorised persons.
8.2.2
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
b
c
d
a
Snow cover or shed
b
Pedestal
c
Prevailing wind direction
d
Air outlet
In any case, provide at least 300 mm of free space below the unit.
Additionally, make sure the unit is positioned at least 100 mm above
the maximum expected level of snow. See
for more details.
In heavy snowfall areas it is very important to select an installation
site where the snow will NOT affect the unit. If lateral snowfall is
possible, make sure that the heat exchanger coil is NOT affected by
the snow. If necessary, install a snow cover or shed and a pedestal.
8.3
Preparing water piping
8.3.1
Water piping lengths and height
difference
In case of EHY32AA gas boiler
e
d
a
H1
b
D1
D2
D3
D1
c
M
a
Outdoor unit
b
EHY32AA gas boiler
c
3-way valve
d
Space heating circuit
e
DHW tank (if applicable)
What?
Distance
H1
Maximum height difference between
outdoor unit and
EHY32AA gas boiler
Depends on the
expansion vessel
(option on
EHY32AA
gas boiler)
—
Maximum total length of the water
piping (indoor part + outdoor part)
Depends on the
external static pressure
(ESP) of the system.
D1
Maximum length of the outdoor part
of the water piping (to prevent
freeze-up of the water piping)
30 m
D2
Maximum distance between
EHY32AA gas boiler and
DHW tank (if applicable)
10 m
D3
Maximum distance between outdoor
unit and EHY32AA gas
boiler
See table below.
If...
Then D3...
Glycol?
Ø
Condition
(a)
ESP 25 kPa ESP 35 kPa
Water
(without
glycol)
3/4" ΔT 5°C → 11.5 l/min
16 m
8.5 m
ΔT 8°C → 7.2 l/min
63 m
45 m
1" ΔT 5°C → 11.5 l/min
89 m
54 m
ΔT 8°C → 7.2 l/min
304 m
224 m
Water +
glycol
1" Start-up with glycol
at –15°C → 7.0 l/min
38 m
25 m
ΔT 5°C with glycol at
20°C → 12.8 l/min
2 m
—
ΔT 8°C with glycol at
20°C → 8.0 l/min
134 m
85 m
(a)
Based on capacity of 4 kW
ESP
External static pressure calculated with 10×(90° elbow)
Hydronic Piping Calculation tool
For other cases the maximum water piping length can be determined
using the Hydronic Piping Calculation tool. The Hydronic Piping
Calculation tool is part of the Heating Solutions Navigator which can
be reached via
https://professional.standbyme.daikin.eu
. Please
contact your dealer if you have no access to Heating Solutions
Navigator.
This recommendation ensures good operation of the unit, however,
local regulations may differ and shall be followed.
Содержание Altherma EHY2KOMB28AA
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