Emerson 3000 User Manual

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 relief valve is a also a necessary piping component.
Depending on the complexity of the system, various other devices may be specified. Pressure gauges, 

flow switches, automatic air separator, tempering valves, standby pumps, sensors for electrical 

controls, and flow switches are just a few of these devices.

Risk of frozen fluids. Can cause piping and system components to rupture and leak, resulting 

in equipment and building damage.
Immediately following the use of water for leak testing or system cleaning, charge the system 

with the proper percentage of glycol and water for your coldest design ambient. Complete 

system drain-down cannot be assured.

It is important to remove any dirt, oil or metal filings that may contaminate the cooling system piping 

in order to prevent contamination of the fresh glycol solution and fouling of the drycooler piping. The 

system should be flushed thoroughly using a mild cleaning solution or high-quality water and then 

completely drained before charging with glycol. Cleaning new systems is just as important as 

cleaning old ones. 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 many cases, in both old and new systems, special cleaners are needed 

to remove scale, rust and hydrocarbon foulants from pipes, manifolds and passages. Clean heat 

transfer surfaces are important in maintaining the integrity of the heating/cooling system. For more 

information on cleaners and degreasers, contact your sales representative. Follow the manufacturer's 

instructions when using these products.
Calculate the internal volume of the system as closely as possible. See Table 14 and Table 16 for 

unit volumes. Use volume in Table 15 for glycol piping volumes.
Table 14

046WG/(045WG) 1.2 

(4.5) 

—

071WG/(070WG) 2.0 

(7.5) 

—

061G/(058G) —

4.0 

(15.1) 

1/2 0.123 

0.008 

0.01 

5/8 0.555 

0.012 

0.15 

3/4 0.666 

0.018 

0.22 

7/8 0.785 

0.025 

0.31 

1-1/8 1.025 

0.043 

0.53