Daikin Altherma EDLQ011-016CW1 Installer's Reference Manual page 28

6 Preparation
(a) The internal water volume of the outdoor unit NOT
included.
(b) If an EKHWP tank is installed, no recirculation pump is
required.
INFORMATION
In critical processes, or in rooms with a high heat load,
extra water might be required.
NOTICE
When circulation in each space heating/cooling loop is
controlled by remotely controlled valves, it is important that
the minimum water volume is guaranteed, even if all of the
valves are closed.
The following illustration shows a setup with remotely controlled
valves:
a b c d e
d
a Outdoor unit
b Heat exchanger
c Pump
d Shut‑off valve
e Backup heater kit (optional)
f Collector (field supply)
g By‑pass valve (field supply)
FHL1...3 Floor heating loop (field supply)
T1...3 Individual room thermostat (optional)
M1...3 Individual motorised valve to control loop FHL1...3 (field
supply)
Maximum water volume
NOTICE
The maximum water volume depends on whether glycol is
added to the water circuit. For more information on the
addition of glycol, refer to
against freezing" on page 38.
Use the following graph to determine the maximum water volume for
the calculated pre-pressure.
A
2,4
2,1
1,8
1,5
1,2
1
0,9
0,6
0,3
20 70 120
105
A Pre-pressure (bar)
B Maximum water volume (l)
Water
Water + glycol
Example: Maximum water volume and expansion vessel pre-
pressure
Installer reference guide
28
f g
T1 T2 T3
M1 M2 M3
FHL1
FHL2
FHL3
"7.7.6 To protect the water circuit
170 220 270
150 185
B
Installation
height
≤185/105 l
(a)
difference
≤7 m No pre-pressure
adjustment is required.
>7 m Do the following:
▪ Increase the
pressure according to
the
installation
difference. The
pressure
increase by 0.1 bar for
each metre above 7 m.
▪ Check if the water
volume does
exceed the maximum
allowed water 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 185 l in case the circuit is
only filled with water, and 105 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) in the installation is guaranteed in all conditions.
NOTICE
If glycol was added to the water circuit, and the
temperature of the water circuit is low, the flow rate will
NOT be displayed on the user interface. In this case, the
minimum flow rate can be checked by way of the pump
test (check that the user interface does NOT display error
7H).
NOTICE
When circulation in each or certain space heating loops is
controlled by remotely controlled valves, it is important that
the minimum flow rate is guaranteed, even if all valves are
closed. In case the minimum flow rate cannot be reached,
a flow error 7H will be generated (no heating or operation).
Minimum required flow rate
The system contains a backup heater / DHW tank
with recirculation pump / glycol
The system does NOT contain a backup heater /
DHW tank with recirculation pump
(a) If an EKHWP tank is installed, no recirculation pump is
required.
See the recommended procedure as described in
during commissioning" on page 77.
EBLQ+EDLQ011~016CAV3+W1 + EK(2)CB07CAV3 +
Daikin Altherma low temperature monobloc
Water volume
(b) (b)
>185/105 l
Do the following:
▪ Decrease the pre-
pressure according to
the required installation
height difference. The
pre-pressure should
decrease by 0.1 bar for
each metre below 7 m.
▪ Check if the water
volume does NOT
exceed the maximum
allowed water volume.
The expansion vessel of
the outdoor unit is too
pre-
small for the installation.
In this case, it is
required
recommended to install
height
an extra vessel outside
pre-
the unit.
should
NOT
15 l/min
20 l/min
(a)
/ glycol
"9.4 Checklist
EKMBUHCA3V3+9W1
4P522034-1 – 2018.01