11
7425MUM753
Model: CWE-Q
- Use and Maintenance Manual
Rev. 15
3.4.2
Use of ethylene glycol as a winter anti-freeze
Instead of emptying the system in winter, you can charge the system with a mixture of water
and a suitable percentage of ethylene glycol, chosen as a function of the lowest expected
temperature of the outside air.
Percentages of ethylene glycol recommended
as a function of the expected temperature of the outside air
Outside air temperature [°C]
0
-5
-10
-12
-15
-20
Outside air temperature [°F]
32
23
14
10.4
5
-4
Percentage of ethylene glycol [%]
10
15
20
25
30
40
Attention!
Maximum concentration of ethylene glycol allowed: 40%. For glycol
concentrations higher than 40%, contact our company's sales offices to make sure that
the mechanical seal and the pump motor are suitable for the type and concentration of
fluid loaded in the hydraulic system
3.4.3
Charging the water circuit
•
Check that the drain taps are turned off;
•
Open all the system’s vent valves;
•
Turn on the system's shut-off devices;
•
Start filling by slowly turning on the system's water-charging tap;
•
When water starts coming out of the vent valves, close them and continue charging
until the manometer shows at least 1 bar; in case of water tank presence, charge fluid
up to maximum level;
•
Bleed the pump using the venting screw on the Archimedes screw;
•
Check the system level again;
•
Check for any leaks by looking at the manometer and inspecting the circuit.
Pump drain screw
Pump venting screws
Summary of Contents for PURESTREAM CHILLERS CWE-Q 041
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