Connection Switch Contacts (Aux Outputs); Low Tariff Mains Connection (Ht/Nt) - Daikin Altherma EHS04P30B Instructions D'installation Et D'utilisation

4.5.17 Connection switch contacts (AUX outputs)

The switch contacts (AUX outputs) can be used for various dif-
ferent functions that can be parametrised.
The switching contact A-A1-A2 switches as configured in the pa-
rameter [AUX Fct] (see operating manual for the control unit).
Fig. 4-41 Connection switching contact (AUX output)
The relays to be used for Variant 2 (switched power > 15 W) must
be suitable for 100 % switch-on duration.
The switch-over contact A-A1-A2 can be used, for example, to
control the heat generator in bivalent heating systems of Daikin
Altherma EHS(X/H) and oil or gas boiler. Examples of the hy-
draulic system incorporation are shown in chapter 9.

4.5.18 Low tariff mains connection (HT/NT)

If the outdoor unit is connected to a reduced tariff mains con-
nection, the voltage-free switching contact S2S of the receiver
which evaluates the low tariff input signal emitted by the elec-
tricity supply company (EVU) must be connected to the plug J8,
connection EVU on the RoCon BM1 circuit board
(see fig. 4-42).
When the parameter [HT/NT Function] > 0 is set, certain system
components are switched off during peak tariff times
(see operating manual of the control unit).
The following types of reduced tariff mains connection are
standard:
– Type 1: With this type of low-tariff mains connection, the
power supply to the heat pump exterior unit is not discon-
nected.
– Type 2: With this type of low-tariff mains connection, the
power supply to the heat pump exterior unit is discon-
nected after a certain period of time.
– Type 3: With this type of low-tariff mains connection, the
power supply to the heat pump exterior unit is discon-
nected immediately.
The potential-free switching contact S2S can be designed as a
normally-closed or a normally-open switching contact.
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1441399_02 – 01/2021 – EN
4 x Set-up and installation
a) If it is designed as an open switching contact, then the
parameter [HT/NT Contact] = 1 must be set.
If the EVU transmits the reduced tariff signal, switching con-
tact S2S is opened. The system switches to "Mandatory
OFF". If the signal is sent again, the potential-free switching
contact S2S closes and the system resumes operation.
b) If it is designed as an closed switching contact, then the
parameter [HT/NT Contact] = 0 must be set.
If the EVU transmits the reduced tariff signal, switching con-
tact S2S is closed. The system switches to "Mandatory OFF".
If the signal is sent again, the potential-free switching contact
S2S opens and the system resumes operation.
[HT/NT Contact] = 1
1 Mains connection boxes for reduced-tariff mains connection
2 Recipient for evaluation of the HT/NT control signal
3 Power supply to heat pump exterior unit (see relevant instruction
manual for the heat pump exterior unit)
4 Potential-free switching contact for heat pump interior unit
Fig. 4-42 Connection HT/NT switching contact
[HT/NT Contact] = 0
Installation and operating instructions
35