Nibe FIGHTER 1330 - Description of Functions - Expansion Card 2

Description of functions - Expansion card 1
FIGHTER 1330
40
A shunt valve (SV-V2) and a circulation pump (VBP4)
can be connected to a second heating circuit with a
lower temperature requirement.
The circulation pumps for heating circuits 1 and 2
(VBP3 and VBP4) are controlled together. These are
activated in standby mode.
The flow temperature is controlled via the shunt valve's
increase/decrease signal and the sensor FS2.
The possibility to set the period and pulse times for the
shunt are located in menus 3.8 and 3.9.
The calculation of the flow temperature is done in the
same way and with the same type of settings as for
heating circuit 1.
Connection of the sub shunt
The flow line sensor 2 (FS2) is fitted on the flow line
towards heating circuit 2. The sensor must make good
contact with the measurement area to give the best
function. When a submerged tube is not available, use
the supplied copper tube. The sensor is connected to
screw terminals X4:7 and X4:8 on the EBV-card”.
The return sensor 2 (RG2) is fitted on the flow line
towards heating circuit 2. The sensor must have good
insulation and make good contact with the measure-
ment area to give the best function. The sensor is con-
nected to screw terminals X4:5 and X4:6 on the EBV-
card”.
The pump's (VBP4) control signal is connected to the
terminal blocks X6:19 (230 V), X6:20 (N), i. e. same
connection as VBP3.
The shunt valve (SV-V2) is connected to the terminal
blocks X6A:5 (230 V decrease signal), X6A:6 (N) and
X6A:7 (230 V increase signal).
Note that FIGHTER 1330 delivers 230 V control sig-
nals intended to control external contactors and
not to drive pumps.
LEK
X6 X6A
X4
Sub shunt
+EBV-card
X4