Nibe S735 - Adjusting Ventilation; Dimension and Ventilation Connections

The ventilation flow must comply with the applicable national
standards.
For optimum heat pump performance, the ventilation flow
should not be less than 25 l/s (90 m³/h).
The ventilation capacity is set in the heat pump’s menu
system (menu 7.1.4 - "Ventilation").
If the exhaust air temperature falls below 10 °C, the com-
pressor is blocked and electric additional heat is permitted.
No energy is recovered from the exhaust air when the
compressor is blocked.
Adjusting ventilation
To obtain the necessary air exchange in every room of the
house, the exhaust air devices must be correctly positioned
and adjusted and the fan in the heat pump adjusted.
Immediately after installation adjust the ventilation so that
it is set according to the projected value of the house.
Incorrect adjustment of the ventilation may lead to reduced
installation efficiency and thus poorer operating economy,
a poorer indoor climate and moisture damage in the building.
Dimension and ventilation
connections
Exhaust air
Extract air
Ø125
620
430
Ø160
560
2005
20-50
440
180
445
600
315
120
60
35
600
NIBE S735Chapter 4 | Pipe and ventilation connections20