Instructions
DH-SMT/PL
VI.KR.Z1.02 ©
Danfoss 09/2006
5
Akva Vita TDP-F - district heating flat station for direct HE and DHW
Control
1. Differential pressure controller
The differential pressure controller reduces the
fluctuating pressure in the district heating network
to a small and invariable operating pressure in
the flat station. The required room temperature
is controlled on your radiator thermostats (fixed
setting throughout the year). It is recommended that
all
radiators are opened a little in each room.
The flat station can be equipped with dp controller
type TD200 or AVPL, depending on customer
demand.
TD200
The differential pressure controller is preset from
factory and
should not be
adjusted afterwards.
AVPL
The AVPL must be mounted in the return. The dp
controller can be set at any differential pressure
between 5 kPa and 25 kPa (0,05 bar and 0,25 bar).
The dp controller is preset on 10 kPa (0,1 bar) and
can be adjusted afterwards.
2. HE temperature control
The HE temperature in the house is controlled
by
radiator thermostats
. As an option the Akva
Vita TDP-F flat station can be equipped with an
electronic programmable room thermostat
and a
zone valve
with
actuator
. In this case
temperature is controlled by the room thermostat
and radiator thermostats. Please note that the room
thermostat keeps the temperature in the whole
apartment according to setting room parameters.
Consult additional maintenance instructions for
room thermostat for further information. It is
recommended to avoid fully opened thermostats
on some radiators and fully shut-off thermostats
on others. Higher temperature at the top and lower
temperature at the bottom part of radiators means
that the system operation is correct. To keep correct
temperature and friendly microclimate for human
beings in the apartment, it is recommended to
ensure regular airing in rooms.
3. Limiting flow controller (return flow)
Optional substation equipment, which is mounted
on district heating company request. Limiting flow
controller should be set to the required maximum
return temperature, in compliance with the local
demands.
Approximate thermostat scale setting:
I = 10 ° C
1 = 20 ° C
2 = 30 ° C
3 = 40 ° C
4 = 45 ° C
I = 50 ° C (max. temp.)
To ensure sufficient cooling and proper operation
the HE return temperature (thermometer indication
on secondary return) must be lower than the
temperature set on the flow controller.
