4
Set-up and installation
Installation and maintenance instructions
25
Daikin Altherma EHS(X/H)(B)-D
Heat pump (indoor unit) with integrated heat accumulator
008.1444099_01 – 11/2018 – EN
For heating support or as an alternative to an electric backup heater,
an external heat generator (e.g. gas- or oil-fired boiler) can be con-
nected to the indoor unit. To connect an external heat generator, the
connection set for external heat generators must be installed (see
Chap. 4.5
).
The heat supplied by the external heat generator must be fed to the
unpressurised storage tank water in the hot water storage tank of the
indoor unit.
▪ Implement the hydraulic connection according to one of the two
following options:
▪
unpressurised via the connections (solar inflow and solar
return flow) of the hot water storage tank
▪
for …Biv indoor unit device types, via the integrated pres-
surised solar heat exchanger.
▪ Comply with the instructions on hydraulic connections
(see
Chap. 1.2
)
▪ Examples of the hydraulic connection (see
Chap. 6
).
The external heat generator request is connected via a relay on prin-
ted circuit board RTX-EHS (see
Fig. 4-38
). Electrical connection to
the indoor unit is possible as follows;
▪ External heat generator has a potential-free switching contact con-
nection for heat request:
▪ Connection to K3 if the external heat generator is responsible
for the domestic hot water preparation and the backup heating
(setting of the [Config. of external heat source] parameter =
DHW + heating support [→ Main menu → Settings → Ext.
source])
or
▪ Connection to K1 and K3 if two external heat generators are
used (setting of the [Config. of external heat source] parameter
= Two external heat generators [→ Main menu → Settings
→ Ext. source])). In this case, K1 connects the external heat
generator (e.g. gas-fired or oil-fired boiler) for heating support
and K3 connects the external heat generator (EKBUxx) for do-
mestic hot water preparation.
or
▪ Connection to AUX connection A (see
Chap. 4.7.13
)
▪ External heat generator can only be connected via mains voltage:
Connection (~230 V, maximum load 3000 W) to K1 and K3.
CAUTION
Danger of voltage flash-overs.
▪ The connections of the RTX-EHS printed circuit board
must not be used simultaneously for connecting mains
voltage (~230 V) and SELV ("Safety Extra Low
Voltage").
Fig. 4-38
Connection on the RTX-EHS printed circuit board
1
Refer to the external heat generator's respective installation in-
structions for a suitable electrical connection.
2
Installing the connection set for external heat generators (see
Chap. 4.5
).
3
Make suitable connections on the RTX-EHS printed circuit board
of the connection set (see
Fig. 4-38
).
4
Fix cables that are fed into the connection set from the outside
using the strain relief clips and cable ties included (see steps 7
and 8 in
Chap. 4.7.4
).
4.7.10
Connecting the room thermostat
INFORMATION
A separate manual containing instructions about installa-
tion and operation is included with this component.
Summary of Contents for Altherma 3 ECH2O
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