4 Set-up and installation
Installation and maintenance instructions
27
Daikin Altherma EHS(X/H)(B)-D
Heat pump (indoor unit) with integrated heat accumulator
008.1444099_01 – 11/2018 – EN
Fig.4-41 Connection of the HP convector (max. 2) to the indoor
unit
Fig.4-42 Connection of the HP convector (max. 3) to the indoor
unit
4.7.13 Connecting switching contacts (AUX
outputs)
The switching contacts (AUX outputs) can be used for various para-
metrisable functions.
Switchover contact A-A1-A2 switches under the conditions set in
parameter [AUX switching function] [→Main menu →Settings →In-
puts/Outputs] (see controller operating instructions).
Fig.4-43 Connection of switching contact (AUX output)
The relays user for variant 2 (switched output >15W) must be suit-
able for a 100% power-on time.
Connection terminals B+B1 are not occupied for these devices or
are available for additional functions.
The relays user for variant 2 (switched output >15W) must be suit-
able for a 100% power-on time.
Switchover contact A-A1-A2 can be used, for example, to control the
heat generators in bivalent heating systems consisting of an indoor
unit and an oil- or gas-fired boiler. Examples of the integration of the
hydraulic system are described inChap. 6.
INFORMATION
If an A2 or G-plus condensing boiler is connected, the
[AUX switching function] parameter and [AUX delay time]
parameter must be set according to the desired function
[→Main menu →Settings →Inputs/Outputs].
See Controller operating instructions → chapter Parameter
settings.
Precise information on the electrical connection and the re-
quired parameter settings for such bivalent heating sys-
tems are available on the Internet (www.daikin.com) or
from your service partner.
4.7.14 Off-peak mains connection (HT/NT)
If the outdoor unit is connected to a low rate mains connection, the
S2S potential-free switching contact of the receiver (which evaluates
the low rate input signal output by the electricity supply company)
must be connected to the J8 connector, EVU connection on the Ro-
Con BM2C printed circuit board (see Fig. 4-44).
When setting the [HT/NT function] parameter > 0 [→Main menu
→Settings →Inputs/Outputs], certain system components are
switched off during peak periods (see controller operating instruc-
tions).
The following types of low rate mains connection are common:
▪ Type 1: With this type of low rate mains connection, the power
supply to the heat pump outdoor unit is not interrupted.
▪ Type 2: With this type of low rate mains connection, the power
supply to the heat pump outdoor unit is interrupted after a certain
period of time.
▪ Type 3: With this type of low rate mains connection, the power
supply to the heat pump outdoor unit is interrupted immediately.
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