Instructions for installation and use
Akva Lux II TDP RENO
© Danfoss | Produced by Danfoss Redan A/S | 2015.10 | 5
VI.JV.R1.02
4.
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 instruc-
tions carefully to prevent the risk of physical injury and/or damage to
property. Exceeding the recommended operating parameters appreci-
ably increases the risk of personal injury and/or damage to property.
Installation, commissioning and maintenance must be carried out
by qualified and authorised personnel (both plumbing and electrical
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 8. For more detailed information about the substation, see
the sections concerning installation and commissioning.
Description
These instructions apply to substation Type Akva Lux II TDP RENO,
which ist a district heating substations, which is especially designed
for the exchange of gas boilers in single-family, semi-detached and
terraced houses as well as flats. With one heating circuit and instanta-
neous water heater for domestic hot water heating.
Akva Lux II TDP RENO substations are fitted with a differential pressure
controller that maintains a constant pressure in the heating circuit(s).
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.
Akva Lux II TDP RENO is designed for wall mounting. For this purpose
it is fitted with a height-adjustable cover made of white painted sheet
steel. The existing connections for DHW and DCW as well as supply
and return of secondary heating circuits can be used without major
changes, but it is recommended that the connections for the primary
hot water flow and return are to lead through the chimney. Optionally
the cold water supply can also be connected from above.
As further option it is possible to install a water hammer vessel to
dampen the pressure strokes.
We recommend regular inspections of the substation - ideally in con-
nection with readings of the district heating meter.
Pay special attention to any leaks and an excessively high return tem-
perature in the district heating circuit (poor cooling of the district heat-
ing water). Cooling – i.e. the difference between the supply and return
temperature of the district heating water – has a significant effect on
the overall economy. Therefore, it is important to focus on the supply
and return temperature in the heating system.
The difference should Typeically be 30–35°C in systems that operate
with radiators. In systems that feature floor heating, the difference is
Typeically 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
related to the return temperature from the heating/floor heating circuit
and the return temperature of the domestic hot water recirculation (in
systems with domestic hot water recirculation). It is therefore important
to focus on these return temperatures..
Cooling from the water heater alone:
During tapping, the level of cooling will Typeically 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
situation, the district heating meter will register very modest con-
sumption 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 outflow 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 fire, leaks or other hazards, immediately shut off
all sources of energy to the substation, if possible, and call for
appropriate assistance.
If the domestic hot water is discoloured or malodorous, shut off
