Connecting Switching Contacts (Aux Outputs); Low Rate Mains Connection (Ht/Nt) - Daikin Altherma 3 R ECH2O Installation Und Betriebsanleitung

3‒41 FWX(V/M)-AATV3 connection
3.7.13 Connecting switching contacts (AUX
outputs)
The switching contacts (AUX outputs) can be used for various
parametrisable functions.
Switchover contact A-A1-A2 switches under the conditions set in
parameter [AUX switching function] [→ Main menu → Settings
→ Inputs/Outputs] (see controller operating instructions).
3‒42 Connection of switching contact (AUX output)
Connection terminals B+B1 are not occupied for these devices or
are available for additional functions.
The contacts in variant 1 (switched power ≤15 W) can be directly
integrated as shown in " 3‒42 Connection of switching contact
(AUX output)" [ 4 27].
The relays user for variant 2 (switched output >15 W) must be
suitable for a 100 % power-on time.
Daikin Altherma EHS(X/H)(B)-D
Daikin Altherma 3 R ECH₂O
008.1451099_00 – 07/2020
3 Set-up and installation
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 boiler. Examples of hydraulic system
integration are described in "Hydraulic connection" in the reference
manual for the fitter.
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 Operating instructions → chapter Parameter settings.
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 service partner.
3.7.14

Low rate 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
connected to plug J8, electricity supply company connection on the
RoCon BM2C PCB (see
connection" [ 4 28]).
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
instructions).
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
normally 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 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.
▪ If implemented as a normally open switching contact, the [HT/NT
contact] parameter=0 must be set [→ Main menu → Settings
→ Inputs/Outputs]. 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.
" 3‒43 HT/NT contact
Installation and operating manual
27