35NIBE F1330
Installation / Adjustment
Hot water circulation pump
A hot water circulation pump (VVC) can be controlled to
circulate the hot water by operating time or period time
within the selected time period.
The Hot water circulation pump (Hw-cp) (VVC) connec-
tion can be made using a T-piece docking to an electric
water heater (peak water heater). This is done especially
on smaller installations. The docking is independent of
how the heat pump works with the double-jacketed water
heater.
When connected to a separate Hw-cp (VVC) outlet on the
double-shelled water heater (e.g. VPA) it is important that
the circulation flow is accurately adjusted and that the
mixing valve on any electric peak water heater is not set
too high. This can result in the stratification in the double
jacket being disturbed and the heat pump knocked out.
This docking is especially used on large installations, which
e.g. use two, double-jacketed water heaters. The sensor
(VVG) is placed in the first water heater and the Hw-cp
(VVC) connection is made to the other.
Connection of hot water circulation pump
There is a potential free relay for the Hw-cp function,
which can be used for the control voltage or power supply
(max 16 A, 250 V). When the relay is used for the con-
trol voltage, you can strap the power supply from X6A:20
to X6A:19, use X6A:21 as N and then get the signal on
X6A:18. Max. current may then be 0.4 A and the control
voltage becomes 230 V. If you take more output from
X6A:20 you can overload the L1-phase causing the fuse
to trip.
The supply to the control signal/power supply to the Hw-cp
(VVC) is connected to the terminal block X6A:19 (Max fuse
16 A and 250 V) and the control signal/power supply out is
on terminal X6A:18.
Description of functions - Expansion card 11
Quick guide - menu settings
hot water circulation pump
Menu 6.1.4 Time of period Hw-cp [U]
Here you select between which times of the day the hot
water circulation pump shall run according to the period
time (menu 6.1.5) and the operating time (menu 6.1.6).
Menu 6.1.5 Periodtime Hw-cp [U]
Here the period time for the hot water circulation pump
is set here. Adjustable between 10 and 60 minutes. The
factory setting is 15 minutes.
Menu 6.1.6 Operatingtime Hw-cp [U]
The operating time per period for the hot water circula-
tion pump is selected here. Adjustable between 1 and 60
minutes. The factory setting is 3 minutes.
The outline diagram with docking instructions is
available at www.nibe.eu
LEK
X6a
The heat pump in the picture is fitted with accessories.
+Exp.card 11
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