Control, double curves option 4
37
For the Installation engineer
FIGHTER 1310
Shunt should be set to 1 for this system.
The option allows a mixing valve in a secondary circuit
to be controlled. Setting of control curve 2 is done via
menu 5.
This option means additional heat can only be con-
trolled with one step (not boiler shunt).
19
Menu 19
If a temperature set back is required a make contact in
a timer, for example, accessory Room thermostat RT
20, should be connected to terminals 1 and 5 on ter-
minal block 30. The preset value is 8, this can be
changed on menu 2b.
If the room thermostat, RT 20 is connected a room
sensor cannot be connected.
The temperature sensors for the flow FG (89) FG2
(32) and the return RG (94) must make good contact
with the measuring point to provide the best perfor-
mance. If a submerged tube is not available, use the
copper tube supplied on the main pipes to the heating
system. Secure the copper tube with 2-4 turns of alu-
minium tape wound tightly. Now secure the tube using
lashing wire. Insert the temperature sensors and insu-
late using two turns of thermal insulating tape.
A mixing valve, if used, is connected to terminal block
(6) at terminal 13 SH+, terminal 11 SH- and terminal
12 -N. The control voltage is 230 V AC, max 0.5 A.
Control voltage to external supplement is obtained by
strapping terminals 9 and 10. Phase to relays/contac-
tors is connected over terminal 7 and terminal 8 is -N.
The relay card’s relay contactor is potential free and
breaks max 0.5 A, 230 V AC.
Temperature sensor placement
Connection, external
mixing valve
Connection, external
additional heat
If a system with double curves has been selected, the
value in menu 19 is set to 1. The heat pump works
against curve 1, FG1, and the heating system that
requires a higher temperature. The flow sensor
FG2/PG (32) works against curve 2 and the system
that needs a lower temperature. The heat pump's sen-
sor for the flow and return should remain connected.
Terminal 11 SH-IN and terminal 13 SH-OUT on termi-
nal block (6) can be used to control an immersion
heater or gas boiler. The relay (Re2) is potential free
and breaks max 0.5 A 230 V AC.
Control, double curves
with external mixing valve
Temperature set back
Shunt
1