Danfoss Akva Lux II TDP-F Instructions For Installation And Use Manual page 6

Instructions for installation and use
4.0 Enduser instructions, General
Instructions
Please read these instructions carefully.
The manufacturer accepts no liability for loss or damage resulting
from failure to comply with these instructions. Read and follow these
instructions carefully to prevent the risk of physical injury and/or
damage to property. Exceeding the recommended operating pa-
rameters appreciably increases the risk of personal injury and/or
damage to property.
Installation, commissioning and maintenance must be carried out
by quali ed and authorised personnel (both plumbing and electri-
cal work).
Once the station has been installed and is operating, there is nor-
mally no need to alter the settings or other functions. The district
heating substation is very reliable and easy to operate.
If necessary, you can change the temperature settings as described
on page 9. For more detailed information about the substation,
see the sections concerning installation and commissioning.
Description
These instructions apply to substation types Akva Lux II TDP-F, which
are district heating substations for direct heating for single-family,
semi-detached and terraced houses as well as ats. With one heat-
ing circuit and instantaneous water heater for domestic hot water
heating.
Akva Lux II TDP-F substations are tted with a di erential pressure
controller that maintains a constant pressure in the heating circuit.
The supply temperature to the radiators is always identical to the dis-
trict heating supply temperature. The room temperature is adjusted
solely using the radiator thermostats.
The Akva Lux II TDP-F are supplied with bypass thermostat mount-
ed before heat meter (bypass consumption is registered by the heat
meter).
The Akva Lux II TDP-F o ers variable and exible connection pos-
sibilities, as connection of pipes can be established both in the top
and bottom of the at station. Optional pipe sets with 4 and 7 pipes
contributes to promote the station's exible connection possibilities.
The Akva Lux II TDP-F variants are designed for wall mounting, and
available only as mount on wall variant.
The Akva Lux II TDP-F is wired and tested in the factory and internal
electrical components are prewired into an electrical terminal box.
We recommend regular inspections of the substation - ideally in
connection with readings of the district heating meter.
Pay special attention to any leaks and an excessively high return
temperature in the district heating circuit (poor cooling of the district
heating water). Cooling – i.e. the di erence between the supply and
return temperature of the district heating water – has a signi cant ef-
fect on the overall economy. Therefore, it is important to focus on the
supply and return temperature in the heating system.
The di erence should typically be 30–35°C in systems that operate
with radiators. In systems that feature oor heating, the di erence
is typically 5–10°C. In these systems, it is important that the supply
temperature does not exceed 35°C.
Please note that a low district heating return temperature is directly
dependent on the return temperature from the heating/ oor heating
circuit and the return temperature of the domestic hot water.
6 DKDHR
Akva Lux II TDP-F, top/bottom connections
Cooling from the water heater alone:
During tapping, the level of cooling will typically be 30–35°C. When
domestic hot water is not being tapped, it is completely normal for the
return temperature from the water heater to rise slightly. In this situa-
tion, the district heating meter will register very modest consumption
as the volume of water is very small.
On substations with recirculation, the heat meter registers the heat
loss in the recirculation pipe.
Irregularities
When reading the meters, check all joints and connections for leaks.
If you identify any irregularities/leaks, contact your professional
provider for assistance.
Check the troubleshooting section before contacting your
professional provider.
Warning! Hot surfaces
Parts of the substation may be very hot and can cause burn in-
juries. Be very careful when you are in the immediate vicinity of
the unit.
Warnings about high pressure and high temperature
The maximum supply temperature in the district heating net-
work can be up to 90°C and the operating pressure can be up
to 10 bar. This may result in a risk of scalding from touching the
substation and from out ow of the medium (water/steam). Ex-
ceeding the substation design data and operating parameters for
pressure and temperature carries an appreciable risk of personal
injury and/or damage to property.
Emergencies
In the event of re, leaks or other hazards, immediately shut o
all sources of energy to the substation, if possible, and call for
appropriate assistance.
If the domestic hot water is discoloured or malodorous, shut o
all ball valves on the substation notify all users and call for profes-
sional assistance without delay.
VI.HE.T1.12 Danfoss District Energy