Figure 22. Typical performance of the heat exchanger, 30 kW heat load
Water specications for the secondary cooling loop
Important:
The water that is being supplied to the heat exchanger must meet the requirements that are described in
this section.
Do not use glycol solutions because they can adversely affect the cooling performance of the heat
exchanger.
Cooling loop requirements
A secondary cooling loop, separate from the main site cooling loop, is required for the rear door heat
exchanger. Cooling distribution units are available from suppliers such as Coolcentric.
The secondary cooling loop must meet the requirements that are outlined in the water chemistry
specication. For more information about water chemistry requirements, see Water cooling system
specication and requirements.
Water-supply requirements for secondary loops
Learn about the specic characteristics of the system that supplies the chilled conditioned water to the
heat exchanger.
Temperature:
The heat exchanger and its supply hose and return hoses are not insulated. Avoid any condition that
might cause condensation. The temperature of the water inside the supply hose, return hose, and
heat exchanger must be kept above the dew point of the location where the heat exchanger is being
used.
Attention:
Typical primary chilled water is too cold for use in this application because building
chilled water can be as cold as 4°C - 6°C (39°F - 43°F).
Important:
Site and hardware planning
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