Danfoss VX Solo HWS Instructions For Installation And Use Manual page 20

Instructions for installation and use
Problem
Supply temperature too low
Poor cooling
20 DKDHR
VX Solo HWS substations
Possible cause
Wrong setting of automatic controls.
Defective controller. The controller does
not react as it is should in accordance
with the instructions.
Outdoor sensor mounted or placed
incorrectly.
Strainer clogged.
Too small heating surface/ too small
radiators compared to the total heating
requirement of the building.
Poor utilization of existing heating
surface.
The system is single-pipe.
VI.HE.M1.02
Solution
Adjust automatic controls, see instruc-
tions for automatic controls.
Call in automatic controls manufacturer
or replace controller.
Mount/place outdoor sensor correctly.
Clean strainer.
Increase total heating surface.
Make sure that the heat is distributed
evenly across the full heating surface -
open all radiators and keep the radiator
in the system from heating up at the
bottom. Higher temperature at the top
and lower temperature at the bottom
part of the radiators means that the
system operation is correct.
It is extremely important to keep the
supply temperature to the radiators as
low as ever possible, while maintaining a
reasonable level of comfort.
Danfoss District Energy