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Fig. 4-42 Connection of the Daikin FWXV-ATV3 (min. 3) to the Daikin
Altherma M ECH
O
2
4.5.13 Connecting switching contacts (AUX outputs)
The switching contacts (AUX outputs) can be used for various
parameterisable functions.
When the Daikin Altherma M ECH
mode, switching contact B-B1 closes. Switching contact B-B1 is
used e.g. to connect an external status display ("Cooling mode
active") or as a switchover contact (heating/cooling), e.g. on the
basic module of the floor heating controller.
Switchover contact A-A1-A2 switches under the conditions set in
the parameter [AUX Fct] (see controller operating instructions).
≤ 15 W
max.1A
B
B
1
A
max.1A
2
A
1
A
> 15 W
250V, max. 63 mA
B
B
1
A
2
250V, max. 63 mA
A
1
A
Fig. 4-43 Connection of switching contact (AUX output)
Daikin Altherma M ECH
O
2
Solar storage tank with heating controller
008.1446799_00 – 07/2019 – EN
O is in [Cooling] operating
2
250V, max. 63 mA
L
N
250V, max. 63 mA
L
N
L / +
N / -
L / +
N / -
4
x
Set-up and installation
The relays to be used according to variant 2 (switched output
> 15 W) must be suitable for a 100% on time.
Switchover contact A-A1-A2 can be used e.g. to control the heat
generators in bivalent heating systems consisting of a Daikin
Altherma M ECH
O and an oil-or gas-fired boiler. Examples of
2
hydraulic system integration are described in chapter 9.
If an A1 or G-plus condensing boiler is connected, the
parameter [AUX Fct] and the parameter [AUX time]
must be set according to the desired function.
See "Daikin RoCon mb controller" operating instructions >
Parameter settings chapter.
Precise information on the electrical connection and the
required parameter settings for such bivalent heating systems
are available on the Internet (www.daikin.com) or from your ser-
vice partner.
4.5.14 Off-peak mains connection (HT/NT)
If the outdoor unit is connected to an off-peak mains connection,
potential-free switching contact S2S of the receiver, which
evaluates the off-peak input signal output by the electricity com-
pany (EVU), must be connected to connector J8, EVU connec-
tion on the RoCon BM2C printed circuit board (see fig. 4-44).
If parameter [HT/NT Function] > 0 is set, certain system com-
ponents are shut off during peak periods (see controller operating
instructions).
The following types of off-peak mains connection are common:
– Type 1: with this type of off-peak mains connection, the
power supply to the heat pump outdoor unit is not inter-
rupted.
– Type 2: with this type of off-peak 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 off-peak mains connection, the
power supply to the heat pump outdoor unit is interrupted
immediately.
Potential-free switching contact S2S can be implemented as a
normally closed or normally open switching contact.
a) If implemented as a normally closed switching contact,
parameter [HT/NT Contact] = 1 must be set.
When the EVU sends the off-peak signal, switching contact
S2S is opened. The system switches to "Mandatory OFF". If
the signal is sent again, potential-free switching contact S2S
closes and the system resumes operation.
b) If implemented as a normally open switching contact,
parameter [HT/NT Contact] = 0 must be set.
When the EVU sends the off-peak signal, switching contact
S2S is closed. The system switches to "Mandatory OFF". If
the signal is sent again, potential-free switching contact S2S
opens and the system resumes operation.
Installation and maintenance instructions
29
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