FRIULAIR PURESTREAM MINI-CUBE QBS 001 EAA Option, Руководство пользователя

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7425MUM651 Model: QBS - Use and Maintenance Manual Rev. 02
Key
1 Tap 4 Thermometer
2 Mechanical filter 5 System/unit discharge
3 Pressure gauge
3.4.2 Use of ethylene glycol as a winter anti-freeze
Instead of emptying the system in the 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
Outside air temperature [°F] 32 23 14
Percentage of ethylene glycol [%] 10 15 20
Attention! Maximum concentration of ethylene glycol allowed: 20%. For glycol concentrations
higher than 20%, 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 the system interception devices;
Attention!
Make sure that the tube that draws the inlet water to the pump is almost always
fluid-filled. It is also recommend, at least in the very early re-start phase, to
close the liquid outlet port of the chiller to increase the pump's prevalence.
This will avoid premature failure of the impeller and will extend the life of
mechanical seal. Also, the engine will not overheat.
•
Feed the water from the filling inlet above the machine until the water reaches the required level
(near the transparent level indicator – see diagram). When the pump starts check the level
again and top up if necessary;
• Check for any leaks by examining the circuit.
Water level indicator