2
DKDHR
VI.GP.N2.02
Danfoss District Energy
Instructions Water
Heaters
2.0 Safety notes
Instructions
This operating manual should be read carefully before installation and
start-up of the water heater. The manufacturer accepts no liability for
damages or faults that result from non-compliance with the operating
manual. Please read and follow all the instructions carefully to prevent
accidents, injury and damage to property. The risk of persons being
injured and equipment damaged increases considerably if the recom-
mended permissible operating parameters are exceeded.
Installation, assembly work, first start-up and maintenance work may be
carried out only by qualified and authorized personnel in compliance
with the safety regulations (both heating and electrical work).
Energy source
The water heater is designed for district heating as the primary source of
energy. However, also other energy sources can be used where the ope-
rating conditions allow it and always are comparable to district heating.
Application
The water heater is designed only to operate with water and other
heating media may not be used.
Connect the water heater to the house piping in a frost-free room,
where the temperature does not exceed 50 °C and the humidity does
not exceed 80%. Do not cover or wall up the water heater or in any
other way block the entrance to the station.
Choice of material
Choice of materials always in compliance with local legislation.
Corrosion protection
The maximum chloride compounds of the flow medium should not
be higher than 300 mg/l. The risk of equipment corrosion increases
considerably if the recommended permissible chloride compounds
are exceeded.
Safety valve(s)
We recommend mounting of safety valve(s), however, always in
compliance with local regulations.
Noise level
≤ 55 dB
PTC2+P controller for domestic hot water
The controller is preset from factory and sealed with a
red sticker. This sealing must not been broken.
The warranty becomes void if the sealing is broken.
Connections
The water heater must be equipped with features that ensure that
the water heater can be separated from all energy sources (also
power supply).
Potential equalization/grounding
Potential equalization is an electrical equalizing connection to se-
cure against user contact with dangerous voltage, which may occur
for example between two piping systems. Potential equalization re-
duces corrosion in heat exchangers, water heaters, district heating
substations and plumbing installations. Equalization of potentials
should be effected according to local regulations.
Warning of hot surfaces
Parts of the water heater may become hot and hot surfaces can
cause serious burns. Please be extremely cautious in close proxi-
mity to the water heater.
Warning of high pressure and high temperature
The stations work at a maximum supply temperature from the dis-
trict heating network of 110°C and the stations work with a operat-
ing pressure of 16 bar, which may put the user at risk of burns from
touching the surface or from the emissions of hot media (water/
steam). The risk of persons being injured and equipment damaged
increases considerably if the recommended permissible operating
parameters are exceeded.
Emergency
In case of danger or accidents - fire, leaks or other dangerous circum-
stances - interrupt all energy sources to the station if possible, and
seek expert help.
In case of discoloured or bad-smelling domestic hot water, close all
shut-off valves on the water heater, inform the operating personnel
and call for expert help immediately.
Warning of transport damage
Before water heater installation, please make sure that the water
heater has not been damaged during transport. Always transport
the water heater with the utmost care and caution.
IMPORTANT - Tightening of connections
Due to vibrations during transport all flange connections, screw
joints and electrical clamp and screw connections must be check-ed
and tightened before water is added to the system. After water has
been added to the system and the system has been put into opera-
tion, re-tighten ALL connections.
(Do not overstrain! - See page 8,
item 10.1
)
3.0 Storage and Handling
If the water heater is stored before installation, make sure that the
place is dry and heated.
(Humidity max. 80% and storage temperature 5-70 °C).
Do not stack the unit higher than factory shipped. Units that are
shipped in cardboard packaging are to be lifted by the carrying
handles of the packaging. Transport / removals over great distances
should be carried out on pallets.
During and after unpacking, the water heater can be lifted by hand
in the mounting plate. Note that lifting in the pipes can cause leaks.
ALWAYS re-tighten.
4.0 Disposal
Dispose of packaging material in accordance with local regulations.
This product consists of materials, which must not be disposed of
together with domestic waste. Switch off the complete power supply
and demount all connection pipes, dismantle the product and sort
the components in various groups before disposal. Always observe
the disposal rules of the local legislation.
Handling
When working on the water heater suitable safety shoes must be
worn.
