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FA ROTEX HPSU monobloc compact • 09/2017
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 ROTEX
HPSU monobloc compact and an oil-or gas-fired boiler. Exam-
ples of hydraulic system integration are described in chapter 9.
4.5.16 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. 4-42).
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.
4.5.17 Connecting an intelligent controller
(Smart Grid - SG)
As soon as the function is activated through the parameter
[SMART GRID] = 1 (see controller operating instructions), the
heat pump is switched to Stand-by, standard or a mode with
higher temperatures depending on the utility company signal.
To do this, the intelligent controller's
potential-free switching
contacts SG1/SG2
must be connected to
connector J8
,
Smart Grid and EVU connection, on the
RoCon BM2C
printed
circuit board
(see fig. 4-43).
As soon as the Smart Grid function is active, the HT/NT function
is automatically deactivated. The heat pump is operated differ-
ently depending on the value of the parameter [Mode SG] (see
controller operating instructions).
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 "ROTEX RoCon mb controller" operating instructions >
Parameter settings chapter.
Precise information on electrical connection and the required
parameter settings for such bivalent heating systems are avail-
able in the Internet or from your service partner.
1
Mains connection box for off-peak mains connection
2
Receiver for evaluating the HT/NT control signal
3
Heat pump outdoor unit power supply (see respective installation
instructions for the heat pump outdoor unit)
4
Potential-free switching contact for heat pump indoor unit
Fig. 4-42 Connection of HT/NT switching contact
Fig. 4-43 Smart Grid connection
[HT/NT Contact] = 1
[HT/NT Contact] = 0
