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FA ROTEX HPSU compact (V5) •
4 x Set-up and installation
4.5.18 Connection switch contacts (AUX outputs)
The switch contacts (AUX outputs) can be used for various dif-
ferent functions that can be parametrised.
If the ROTEX HPSU compact is in the [Cooling] operating mode,
the switch contact B-B1 closes. The switch contact B-B1 is used,
e.g. for connecting an external status display ("Cooling Mode
Active") or as a changeover contact (heating/cooling) on the
basic module of the underfloor heating regulation ROTEX
RoCon UFH.
The switching contact A-A1-A2 switches as configured in the pa-
rameter [AUX Fct] (see operating manual for the control unit).
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 ROTEX
HPSU compact and oil or gas boiler. Examples of the hydraulic
system incorporation are shown in chapter 9.
4.5.19 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 pl
ug J8,
connection EVU on the RoCon BM1 circuit board
(see fig. 4-43).
When the parameter [HT/NT Function] > 0 is set, certain system
components are swtiched off during peak tariff times (see oper-
ating manual of the control unit).
The following types of reduced tariff mains connection are
stan
dard:
– 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
po
wer 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
po
wer 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.
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 s
witches to "Mandatory OFF".
If the signal is sent again, the potential-free switching contact
S2S opens and the system resumes operation.
This component has a separate manual attached,
including among other things instructions for installation
and operation.
Fig. 4-42 Connection switching contact (AUX output)
When the 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 operating instructions "ROTEX controller
RoCon HP" > Section Parameter settings.
Detailed information for the electrical connection and
the associated parameter settings for such bivalent
heating systems can be taken from the internet or from
your service partner.
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 instr
uction
manual for the heat pump exterior unit)
4 Potential-free switching contact for heat pump interior unit
Fig. 4-43 Connection HT/NT switching contact
[HT/NT Contact] = 1 [HT/NT Contact] = 0
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