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Piping installation
Installer reference guide
78
A
2.4
2.1
1.8
1.5
1.2
1
0.9
0.6
0.3
20
70
A Pre-pressure (bar)
B Maximum water volume (l)
Water
Water + glycol
Example: Maximum water volume and expansion vessel pre-pressure
Installation
height
(a)
difference
≤7 m
No pre-pressure adjustment is
required.
>7 m
Do the following:
▪
Increase the pre-pressure
according to the required
installation
difference. The pre-pressure
should increase by 0.1 bar
for each metre above 7 m.
▪
Check if the water volume
does
maximum
volume.
(a)
This is the height difference (m) between the highest point of the water circuit and the
outdoor unit. If the outdoor unit is at the highest point of the installation, the installation
height is 0 m.
(b)
The maximum water volume is 200 l in case the circuit is only filled with water, and 120 l in
case the circuit is filled with water and glycol.
Minimum flow rate
Check that the minimum flow rate (required during defrost/backup heater
operation (if applicable)) in the installation is guaranteed in all conditions.
If operation is...
Cooling
Heating/defrost when outdoor
temperature is above –5°C
200 220
270 290
120
170
Water volume
(b)
≤200/120 l
height
NOT
exceed
the
allowed
water
Then the minimum required flow rate
320
B
(b)
>200/120 l
Do the following:
▪
Decrease the pre-pressure
according to the required
installation
difference. The pre-pressure
should decrease by 0.1 bar
for each metre below 7 m.
▪
Check if the water volume
does
NOT
exceed
maximum
allowed
volume.
The expansion vessel of the
outdoor unit is too small for
the installation. In this case, it
is recommended to install an
extra vessel outside the unit.
is...
20 l/min
EBLA09~16D + EDLA09~16D
Daikin Altherma 3 M
4P620241-1B – 2022.05
height
the
water
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