Nibe F2030, Installer Manual, Page: 23 / 56

Optional connections
NOTE
The following pages about thermostats, addi-
tional heat, common alarms and downtime,
do not apply when F2030 is controlled by a
NIBE indoor module.
Thermostat control
You can use a basic thermostat or a closing potential-
free contact to switch the compressor on and off. This
thermostat should be of the breaking type (NC) when
the set temperature has been reached. The contactor
should be potential free.
Connect the thermostat to terminal block X5:7 and 8
as illustrated below.
8
6
7
5
4
2
3
1
X5
External F2030
Thermostat
Additional heat / Downtime
F2030 is equipped with a potential free contactor in-
tended for additional heat. Max 250V 2A.
The setting of the ambient temperature (balance
temperature) when the additional relay is activated is
made on channel A5, see the section "Control - Channel
description".
External additional heat is connected via the additional
relay terminal block J5:C,NO and NC on control card
AA21.
Conditions for connecting additional heat:
■
the ambient temperature should be lower than the
set balance temperature (channel A5).
■
The compressor must have been operating for the
minimum period that can be set in channel A6. De-
frosting is included in this time.
If the ambient temperature falls to a level below the
set value, stop temperature (downtime), in channel A7
compressor operations are blocked and all heating
must take place using the external additional heat via
the downtime relay, terminal block J6:C,NO and NC on
control card AA21. This function is also activated when
F2030 is de-energized.
If the ambient temperature exceeds 40 °C compressor
operation is blocked and the downtime relay is activ-
ated.
The connection to the additional relay is made as illus-
trated below.
NO
NC
C
NO
NC
C
Tillsatsvärme
Stillestånd
NO
NC
COM
NO
NC
COM
External F2030
AA21-J5
Additional heat
Downtime
AA21-J6
Max load across the relay contactors is 250V 2A.
During operations without the need of the additional
heat or downtime the relay contactors are closed
between COM and NO.
Additional heat and downtime are acquired between
COM and NC.
The contactors are drawn in the deenergized state.
Additional and downtime relays are activated during
normal operating conditions for F2030. Both relays are
deactivated in the event of operating disruptions.
Example of addition connection
Basic electrical circuit diagram for connection of auxili-
ary relays for additional heat and downtime.
LP HP
34
NO O/C NC
Hjälpkontaktor
(ingår ej vid leverans)
12 – 230V
15 88 90 86 41
33
89
93
34
91
Auxiliary contactor
(not supplied)
COM
21 Chapter 5 | Electrical connections NIBE™ F2030