Nibe VST 11 User manual

When hot water control is used without the accessory
Electrical Supplement FIGHTER 1110 the variable
XHW stop in the service menu must be changed to 50
°C. See the Installation and Maintenance Instructions
FIGHTER 1110 for information. If the Electrical
Supplement accessory is fitted additional functionality
is available for temporary and periodic increase of the
hot water temperature. This increase occurs to
approx. 60 °C where the increase above 50 °C is han-
dled by the Electrical Supplement. The duration for the
temporary increase is 24 h, and the periodic
increase interval is between 1 and 90 days.
The functions are activated using the “Extra Hot
Water” button on FIGHTER 1110’s front panel.
Pressing the button once activates the temporary
increase, and pressing it twice activates the periodic
increase.
AV Shutoff valve
SF Particle filter
VVG Hot water sensor
VXV Threeway valve
VVB/ACK Water heater/accumulator
El VVB Electric hot water heater
19 Motor valve, radiator/heater
88 Temperature sensor,
supplied with FIGHTER 1110
List of components
MAV GB 0321-1 611775
VST 11
R
INSTALLATION INSTRUCTIONS
Hot water control VST 11
This accessories provides the heat pump FIGHTER
1110 with the possibility to prioritise hot water charg-
ing on systems with floating condensing. This also
requires a hot water accumulator, for example, NIBE
VPA. When the hot water temperature sensor (88) is
connected the control system is automatically activat-
ed for the charging functions. When there is a demand
for hot water, the heat pump gives this priority and
devotes its entire output to water heating. No room
heat is produced in this mode. When there is a
demand for hot water the maximum time for water
heating is 60 minutes. After this, room heating is pro-
duced for 15 minutes before further water heating can
take place. Hot water charging starts when the hot
water sensor (88) has fallen to the set start tempera-
ture (30 – 49 °C). The 3-way valve (19) is fitted so that
it switches between the heating system and the water
heater, i.e. when the accumulator/water heater is
charged the valve switches over to the radiators/floor
heating system.
General
Voltage 230 V, 50 Hz, 6 VA
Connections Ø28mm, Compression ring
Technical specifications
Extra hot water
IP40
El VVB
VVG
KV
VV
VXV
B
AB
A
SF
AV
AV
VB-fram
VB-retur
Givarkabel till Värmepump
19
88
VVB / ACK
VST 11
19
88
Component key
Components
In order to reach the maximum hot water temperature,
hot water charging is stopped by the operating pres-
sure switch on the heat pump. The water heater is
equipped with the requisite safety equipment.
Forward
Return
Connected to the heat pump

R
VST 11
The sensor (88) is connected to terminal block 21 at
positions 5and 6. The sensor cable is routed through
the right-hand cable duct and out to the accumulator
tank/water heater. The sensor (88) is supplied with
FIGHTER 1110 and is not included with this accesso-
ry.
Connection of the
hot water sensor
123456
21
88
VVG
VB retur
VB fram
The 3-way valve is connected to terminal block 6.
Component placement, electrical connection area
6
19
563412
M
Brun
Blå
Svart
1
R
0
+2
-2
max
min
LEK
621 Cable duct for
sensors.
Cable duct for the
electrical supply.
Wiring diagram, shuttle valve
FIGHTER 1110 4 kW shown with the extra equipment
NOTE!
The electrical installation must be
carried out by a qualified electrician.
The electrical installation and wiring
must conform to current regulations.
Brown
Blue
Black
RG
FG
NIBE AB
SWEDEN
Box 14
Järnvägsgatan 40
SE-285 21 MARKARYD
Tel: +46 - (0)433 - 73 000
Fax: +46 - (0)433 - 73 190
www.nibe.com