Pfannenberg EB 210, Инструкция по эксплуатации и техническому обслуживанию

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Operating and Maintenance Instructions - Chiller - Series EB 210 - EB 440 © Pfannenberg GmbH Page 81 / 293
EN
WARNING
Malfunction due to incorrect sequence of commissioning steps
Remove tank cap [3] , which is located at the front of the chiller (external).
Fill tank with coolant (water-glycol mixture in the appropriate concentration) until the
minimum level (check level indicator [4] ) is reached (water quality and treatment
should be established according to the application specifications).
Remove the caps inside the hydraulic fittings connection before to connect the chiller to
your device.
Hydraulic connections are the first ones to be assembled during installing operation, to
be followed by electric connections.
5.5 Fill the tank and the hydraulic circuit
Fill tank with coolant (water-glycol mixture in the appropriate concentration) until the minimum level (check level
indicator [4] ) is reached (water quality and treatment should be established according to the application
specifications).
Chiller circuit is designed with non-ferrous materials: stainless steel, brass, copper, bronze, polyethylene, rubber,
etc.
To speed up the filling procedure it is recommended to fill-in the user circuit as well.
5.5.1 Process Water / Fluids
PFANNENBERG chillers should be filled to the proper level with an inhibited glycol designed for Industrial chiller
systems. Do not use automotive antifreeze! The inhibitors used in automotive antifreeze can break down quickly
and accelerate the degradation of the coolant base (glycol); as well as promote corrosion in a system. Silicates
used in automotive antifreeze coat heat exchangers, resulting in reduced heat transfer. Also, silicates can gel
causing fouling and plugging of a system.
The ratio of inhibited glycol to water should be adequate to prevent freezing at the lowest ambient temperature.
Check the level with all lines filled.
The glycol mixture should be checked periodically (3 to 6 months) for
proper concentration . When filling the system, always use a pre-mixed solution in the proper ratio to maintain
freeze and corrosion protection. Demineralized/deionized water is recommended because many municipal water
supplies contain large amounts of chlorine, which can react unfavorably with glycol.
When using water to create or dilute the mixture, please consider the following:
It’s recommended to use demineralized/deionized water (DM/DI) but not distilled water.
If pure water is used, do not exceed these properties:
Fresh water free of contamination
pH-level: 7-9
Hardness: <8 °dH
Conductivity: <300 µS/cm
Chloride: <50 mg/l
Do not allow mechanical contamination to get in the water. Use water filters if this could be an issue.
Watch for chemical contamination. If this is to become an issue, treat the water with passivators and/or inhibitors.
Do not allow biological, slime bacteria and algae contamination. If this does happen, treat the water with biocides.