Shuttle Valves; Valve Positions; Valve Position Checks - Nibe HPAC 28 Instrucciones De Instalación Y Mantenimiento

Shuttle valves

Valve positions

The heating/cooling modes are controlled by 4 shuttle
valves, which, depending on the outdoor temperature,
switch between the different modes.
129 130 131 132 133
The lamp on each valve
will be extinguished or lit,
depending on the heating
or cooling mode. A lit
lamp indicates that the
valve is in its output posi-
tion, i. e. it is open in the
direction labelled 1.
Heating
Passive cooling
Active cooling
The above applies when switching on the installation
and in the operating mode in question.

Valve position checks

3 1
129 130
1 3
There are signs at the sides of the valves where it can
be checked that the valve outlets point in the directions
described above.
121
123 124
129
5 4
lit
lit
not lit
1 3
131 132
3 1
HPAC 28
122 134
130 131
71 70
lit
lit not lit
not lit not lit
NOTE!
When changing the heating/cooling
mode, there is a delay of approximately
60 seconds before the valves change their
Shuttle valves
132
lit lit
not lit
not lit
positions.
GB
31