Nibe VPB series User's And Installer's Manual page 18

Electrical installation
NOTE
Electrical installation and service must be carried
out under the supervision of a qualified electri-
cian, and in accordance with applicable electrical
safety regulations.
Sensors
VPB 300 can be supplemented with up to two hot water
sensors, one for display and one for control. The display
sensor is positioned in the submerged tube for the dis-
play sensor (UA1) and the control sensor is positioned
in the submerged tube for the control sensor UA2. In
cases where it is only possible to connect one sensor, use
the submerged tube for the control sensor (UA2).
VPBS 300 can also be supplemented with a solar sensor.
This is placed in a submerged tube for the solar sensor
(UA3).
Use the sensors provided with the heat pump/control
module. When no heat sensors have been provided these
must be ordered from the manufacturer of the heat
pump/control module.
18 Chapter 3 | For the Installer
The figure shows VPBS 300.
UA1
UA4
UA5
UA2
UA3
VPB/VPBS