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6 Preparation
Installer reference guide
28
EBLQ+EDLQ011~W1 + EK(2)CB
EKMB9W1
Daikin Altherma low temperature monobloc
4P522034-1 – 2018.01
(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:
FHL1
FHL2
FHL3
M1
T1
T3
T2
M2
M3
f
g
d
d
a
e
b c
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
"7.7.6 To protect the water circuit
.
Use the following graph to determine the maximum water volume for
the calculated pre-pressure.
20
2,4
2,1
1,8
1,5
1,2
0,9
1
0,6
0,3
70
120
170
150
105
185
220
270
A
B
A
Pre-pressure (bar)
B
Maximum water volume (l)
Water
Water + glycol
Example: Maximum water volume and expansion vessel pre-
pressure
Installation
height
difference
(a)
Water volume
≤185/105 l
(b)
>185/105 l
(b)
≤7 m
No pre-pressure
adjustment is required.
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.
>7 m
Do the following:
▪ Increase
the
pre-
pressure according to
the
required
installation
height
difference. The pre-
pressure
should
increase by 0.1 bar for
each metre above 7 m.
▪ Check if the water
volume
does
NOT
exceed the maximum
allowed water 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.
(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
15 l/min
The system does NOT contain a backup heater /
DHW tank with recirculation pump
(a)
/ glycol
20 l/min
(a)
If an EKHWP tank is installed, no recirculation pump is
required.
See the recommended procedure as described in
during commissioning" on page 77
.
Summary of Contents for Altherma M EDLQ011-016CW1
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