Installation And Start-Up; Heat Transfer Medium Treatment - Danfoss DSA1 MINI Installation Manual

Danfoss District Energy
7.0 Installation and start-up
The unit may only be installed and commissioned by skilled
personnel that are experienced in installation, commission
and operating of the DSA product series. Proper transport
and professional storage must be ensured.
The controller is intended for use in high voltage systems
(230/240 Vac; 50 hz). Safety regulations must be observed
to ensure a safe installation, operation and maintenance.

7.1 Heat transfer medium treatment

Water in the heating system is primarily used as a heat
transfer medium and therefore plays a decisive role in
the safety and a fault-free system operation. The proper
preparation of the respective water is, however, often
simply forgotten. The Danfoss standard Guideline of Water
Quality for copper brazed Plate Heat Exchangers very
precisely regulates how, the heating medium is optimised
to ensure the product life time.
The consequential damage of not preparing or incorrect
preparation is often expensive for the system operator,
whereby the overall costs of a system interruption cannot
be estimated. Corrosion and general deposits/build-ups in
combination with oxygen cause red rust, which sticks to the
walls and in plastic pipes and causes cross section reduc-
tions, and in many cases flow constriction or interruption.
8
DEN-SMT/PL
DSA 1 MINI - Installation and commisioning
The following must be observed before initial installation:
1. Flush out pipes (use side dummy plugs on primary line).
2. Fill the feed line first before slowly filling the return line.
The consequences:
• Higher energy consumption
• Defective thermostat valves
• Defective control units
• Blocking pumps
• Damage on the heat exchanger
• Boiling noises
• Localised corrosion
• Defective heat meters
Proper water preparation provides extensive system safety
points, ranging from improved operation cost, prevention
of defect components, corrosion damage and reduced
maintenance costs.
Your installation engineer will be happy to advise you!
VM.HE.B2.02 Danfoss District Energy