Dantherm HCV 3, Installation And Service Manual

Page: 54 / 166

52
How to balance the unit,
continued
Procedure,
continued
Step
Action
8 Balance the nominal air flow rate on the
exhaust air side by adjusting the potenti-
ometer for the exhaust fan until the pres-
sure difference determined on the graph
is achieved. The potentiometers are
placed on the back of the control panel.
Wait approximately two minutes before
the next adjustment of potentiometers, in
order to let the unit stabilise the air flows.
Strong wind against the building
might affect balancing the unit.
9 Check the pressure difference over heat exchanger on the supply air side one
more time, as it might has changed due to the adjustment on the exhaust air
side. Make an adjustment if necessary.
10 Adjust the balancing of the valves in every room in order to make sure that the
desired air flow rate can be supplied in every room.
11 Check the nominal air flow rates based on earlier instructions in this proce-
dure as radical adjustments (balancing) will influence the nominal air flow
rates.
12 Write down the final set-ups for the potentiometers, pressure losses over the
heat exchanger and air flow rates in the table
on the unit
:
After balancing
Deactivate Installation Mode by pressing Manual + Auto for 6 seconds.
The operational modes are described closely in the user’s guide.
[m
3
/h]
[m
3
/h]