Vertiv Liebert Drycooler - Preparing to Fill the System; Guidelines for Expansion Tanks, Fluid-Relief Valves, Air Management and Other Devices

5.1 Guidelines for Expansion Tanks, Fluid-reliefValves,AirManagementandOtherDevices
An expansion tank must be provided for expansion and contraction of the fluid due to temperature change in this closed
system. Vents are required at system high points to vent trapped air when filling the system. A fluid pressure relief valve is
also a necessary piping component.
All systems must have an air management system to ensure proper component operation and system performance. There
are several methods that can be used to manage the air within a closed loop hydronic system. Depending on the method
chosen, the system may include one or more of the following ancillary components: tank-steel (expansion, compression,
diaphragm or bladder), air separator and air vent.
Consult your local engineer to determine which method will be used and where these components must be installed.
Depending on the complexity of the system, various other devices may be specified—refer to site-specific drawings. Some
of the devices that may be required are: pressure gauges, flow switches, automatic air separator, tempering valves, standby
pumps and sensors for electrical controls.
5.2 Preparing to Fill the System
NOTICE
Risk of improper handling of glycol products. Can cause environmental damage.
Before using any glycol products, review the latest manufacturer's Material Safety Data Sheets and ensure that
you can use the product safely. The installer must read, understand and comply with the information on the
product packaging and in the current Material Safety Data Sheets. Make this information available to anyone
responsible for operation, maintenance and repair of the drycooler and related equipment.
Because government regulations and use conditions are subject to change, it is the user's responsibility to
determine that this information is appropriate and suitable under current, applicable laws and regulations.
NOTICE
Risk of using the wrong type of glycol. Can cause piping damage, coolant fluid leaks, and catastrophic and
expensive building and equipment damage.
Do not use automotive antifreeze as it contains chemicals that can damage the piping system.
Typical inhibited formula ethylene glycol and propylene glycol are supplied with corrosion inhibitors and do
not contain a silicone anti-leak formula. Commercial ethylene glycol and propylene glycol, when pure, are
generally less corrosive to the common metals of construction than water itself. Aqueous solutions of these
glycols, however, assume the corrosivity of the water from which they are prepared and may become
increasingly corrosive with use when not properly inhibited.
Remove any dirt, oil, or metal filings that may contaminate the cooling system piping to prevent contamination of the fresh
glycol solution and fouling of the drycooler piping. Flush the system thoroughly using a mild cleaning solution or high-
quality water and then completely drain before charging with glycol.
Cleaning a new system is just as important as cleaning an old one. New systems can be coated with oil or a protective film.
Dirt and scale are also common. Any residual contaminants could adversely affect the heat-transfer stability and
performance of your system. In most cases, special cleaners are needed to remove scale, rust, and hydrocarbon foulants
from pipes, manifolds, and passages. For more information on cleaners and degreasers, contact your Vertiv representative.
Follow the manufacturer’s instructions when using these products.
Vertiv | Liebert® Drycooler Installer/User Guide
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