Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates; Preparing Water Piping; Water Piping Lengths And Height Difference - Daikin Altherma EJHA04AAV3 Installer's Reference Manual
Hybrid hydrosplit heat pump
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Also See for Altherma EJHA04AAV3:
- Installation manual (36 pages) ,
- Operation manual (16 pages) ,
- Installer's reference manual (112 pages)
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8 Preparation
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
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
outdoor unit" on page 31
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.
Installer reference guide
26
a
c
b
"9.3 Mounting the
8.3
Preparing water piping
8.3.1
Water piping lengths and height
difference
In case of EHY2KOMB28+32AA gas boiler
D1
D3
H1
a
D1
a
Outdoor unit
b
EHY2KOMB28+32AA gas boiler
c
3-way valve
d
Space heating circuit
e
DHW tank (if applicable)
What?
H1 Maximum height difference between
outdoor unit and
EHY2KOMB28+32AA gas boiler
— Maximum total length of the water
piping (indoor part + outdoor part)
D1 Maximum length of the outdoor part
of the water piping (to prevent
freeze-up of the water piping)
D2 Maximum distance between
EHY2KOMB28+32AA gas boiler and
DHW tank (if applicable)
D3 Maximum distance between outdoor
unit and EHY2KOMB28+32AA gas
boiler
If...
Glycol?
Ø
Condition
Water
3/4" ΔT 5°C → 11.5 l/min
(without
ΔT 8°C → 7.2 l/min
glycol)
1" ΔT 5°C → 11.5 l/min
ΔT 8°C → 7.2 l/min
Water +
1" Start-up with glycol
glycol
at –15°C → 7.0 l/min
ΔT 5°C with glycol at
20°C → 12.8 l/min
ΔT 8°C with glycol at
20°C → 8.0 l/min
(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.
Daikin Altherma Hybrid hydrosplit heat pump
b
c
M
d
D2
e
Distance
Depends on the
expansion vessel
(option on
EHY2KOMB28+32AA
gas boiler)
Depends on the
external static pressure
(ESP) of the system.
30 m
10 m
See table below.
Then D3...
(a)
ESP 25 kPa ESP 35 kPa
16 m
8.5 m
63 m
45 m
89 m
54 m
304 m
224 m
38 m
25 m
2 m
—
134 m
85 m
EJHA04AAV3 + EHY2KOMB28+32AA
4P531180-1 – 2018.06
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