AEC Glacier Series Air and Water Cooler Portable Chillers - Manual (Page 33)

Page 32 Glacier Series Portable Chillers
3-12 Automatic Water Makeup Option
The Glacier Series Chiller may be connected to an automatic make up system if the optional
package (float switch, pressure regulating, pipe fittings, solenoid valve and ½" NPT City Water
Make Up connection) is factory installed.
Refer to Figure 12 for the additional components necessary for this installation. Your piping
must provide backflow protection and prevent over-pressurization of the reservoir.
Caution!
• Prevent reservoir over-pressurization by setting the required pressure
regulating valve to limit make up water pressure to less than 5 psi. The
reservoir must remain vented to the atmosphere.
• If the automatic make up system is connected to a city water system, make
provisions to prevent backflow contamination. Install an approved backflow
preventer in accordance with local codes. See Figure 12 (Page 26) for a
suggested piping arrangement.
• Adding straight city water into a glycol/water mixture dilutes the solution
and eventually leads to system freeze-up. Damage from freeze-up is not
covered by the AEC, Inc. warranty!
To prevent system freeze-up in automatic makeup applications, use a system to replenish the
glycol. AEC suggests the following methods:
Chemical Feeder
Use a chemical feeder to meter glycol into the makeup water and to maintain the water/glycol
mixture you want. Contact the Application Engineering Sales Department for more information
on this equipment.
Make Up Reservoir
You may mix a glycol/water solution in a tank and use it as a source of makeup fluid. Consult
the Application Engineering Sales Department for more information on this piping
configuration.