CTC Union GSi 16, Installation And Maintenance Manual

Page: 113 / 120

113 CTC GSi 16
i
If you do not have
radiator thermostats
on the upper floor,
you may need to
install them.
A correctly operating heating circuit is of significant importance to the heat
pump’s operation and affects energy savings.
When adjusting the system, always do so with all radiator thermostats fully
open. The thermostats can be individually adjusted after a few days in the
other rooms.
If you do not achieve the set room temperature, check:
• That the heating circuit is correctly adjusted and is functioning normally.
That radiator thermostats are open and the radiators are equally warm
all over. Touch the entire radiator surface. Bleed the radiators. In order
for the heat pump to run economically, the heating circuit must function
well in order to provide good savings.
• That the heat pump is operating and no error messages are displayed.
• That there is sufficient electrical power available. Increase if necessary.
Also check that the electric power output is not limited due to
excessively high electricity loads in the property (load monitor).
• That the product is not set to the “Max. permitted primary flow
temperature” mode with a too low value.
• That “Primary flow temperature at -15°C outdoor temperature” is set
sufficiently high. Increase if necessary. More can be read about this in
the section entitled “The property’s heating curve”. However, always
check the other points first.
• That the temperature reduction is set correctly. See Settings/Heating
circuit.
If heating is uneven, perform a check (if room sensor installed):
• That the placement of the room sensors is appropriate for the house.
• That the radiator thermostats don’t interfere with the room sensor.
• That no other heat sources/cold sources interfere with the room sensor.