Connecting Switching Contacts (Aux Outputs); Off-Peak Mains Connection (Ht/Nt) - Daikin Altherma 3 H HT ECH2 O Referenzhandbuch Für Den Monteur

Fig. 3-44 FWX(V/M)-AATV3 connection
3.7.13 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. 3-45 Connection of switching contact (AUX output)
The relays user for variant 2 (switched output > 15 W) 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 > 15 W) must be suit-
able for a 100 % power-on time.
Daikin Altherma ETS(X/H)(B)-D
Heat pump (indoor unit) with integrated heat accumulator
008.1447299_00 – 06/2019 – EN
3
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
INFORMATION
If an A2 F or G-plus condensing boiler is connected, the
[AUX switching function ] and [AUX wait time] parameters
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.
3.7.14

Off-peak mains connection (HT/NT)

If the outdoor unit is connected to a low rate mains connection, the
potential-free switching contact S2S of the receiver, which evaluates
the low rate input signal output from the utility company must be con-
nected to plug J8, EVU connection on the RoCon BM2C PCB (see
Fig. 3-46).
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.
Potential-free switching contact S2S can be implemented as a nor-
mally closed or normally open switching contact.
▪ If implemented as a normally closed switching contact, the [HT/NT
contact] parameter = 1 must be set [→ Main menu → Settings
→ Inputs/Outputs]. When the utility company sends the off-peak
signal, switching contact S2S is opened. The system switches to
"Mandatory OFF". If the signal is sent again, potential-free switch-
ing contact S2S closes and the system resumes operation.
▪ If implemented as a normally open switching contact, the [HT/NT
contact] parameter = 0 must be set [→ Main menu → Settings
→ Inputs/Outputs]. When the utility company sends the off-peak
signal, switching contact S2S is closed. The system switches to
"Mandatory OFF". If the signal is sent again, potential-free switch-
ing contact S2S opens and the system resumes operation.
Set-up and installation
in Chap. 9.5.
Installer reference guide
27