FRIULAIR PURESTREAM CWB FC, Руководство пользователя и по обслуживанию

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7425MUM661 Model: CWB FC - Use and Maintenance Manual Rev02
Attention! Never work with an open flame near or inside the unit when making
connections to the water system.
Important! If the machine charged with pure water, is stopped during the winter,
you drain water from the chiller (see paragraph 3.4.2) to avoid damage
due to ice.
Important! When charging water, purge air for circuit of free cooling coils (see
vent valve on image at page 8 – point 27). Plug definitely the vent
valve with the screw tap once the water circuit is filled (see picture
below).
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 -12 -15 -25 -30
Outside air temperature [°F] 32 23 14 10,2 5 -13 -22
Percentage of ethylene glycol [%] 10 15 20 25 30 40 50
Attention! Maximum concentration of ethylene glycol allowed: 50% . Anyway, for glycol
concentrations higher than 30%, 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