Description of functions – Expansion card 2
FIGHTER 1330
44
The cooling system is connected to the heat pump col-
lector circuit, through which cooling is supplied from
the collector via the circulation pump (CP-K) and the
shunt valve (SV-K).
When cooling is required (activated from the outdoor
sensor and any room sensor) the three way valve and
the circulation pump are activated. The shunt valve
regulates so that the cooling sensor (KG) reaches
the current set point value that is equal to the outdoor
temperature and the set min. value for the cooling tem-
perature (to prevent condensation).
For connection of, and function for, room sensors, see
section “Description of functions – Basic functions” >
“Room control”.
Connection of passive cooling with 4
pipe system
The shunt valve (SV-K) is connected to terminal block
X6B:8 (230 V reduce signal), X6B:9 (N) and X6B:10
(230 V increase signal).
There is a potential free relay for the circulation pump
function (CP-K), which can be used as control voltage
or power supply (Max 6 A, 250 V). If the relay is used
as control voltage the supply can be bridged inter-
nally from X13:4 to X6B:22, use X13:9 as N and then
receive the signal on X6B:23. Max current must be 0.4
A and the control voltage is 230 V.
External supply to the control signal/power supply for
the circulation pump (CP-K) is connected to terminal
block X6B:22 (max fusing 6 A and 250 V) and the con-
trol signal/power supply is on X6B:23.
For the cooling sensor (KG) location see docking
instructions. The sensors must have a good contact
with the measuring point for best function. If a sub-
merged tube is not available, use the copper tube sup-
plied.
The sensor is connected to screw terminals J5:7 and
J5:8 on the “measurement card”.
Passive cooling with 4 pipe system
+Measure card
LEK
J5
X6B
X13
+Exp. card 2
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