Anti-freeze protection (accessories)
A water glycol mix is generally used as medium for
a cold water system. Depending on the glycol type
and quantity used, the viscosity changes, the pres-
sure loss increases and the unit's cooling or
heating output reduces. A
All system components must be approved for use
with glycol.
NOTICE!
The product and safety data sheets of the
glycol type used must be observed during use
and disposal.
Diaphragm expansion vessel (MAG)
To avoid pressure fluctuations during standstill
because of temperature changes, diaphragm
expansion vessels filled with nitrogen (moisture
neutral) must be integrated in the system.
Safety valve
Safety valves limit excess operating pressure due
to excess warming or overfilling of the operating
medium. The valve outlet requires unobstructed
draining into a drain line. Applicable local disposal
ordinances must be observed if glycol is used.
Automatic bleed valves
The unit has one or two manual bleed valves on
the collector pipe of the register
. The unit can be
bled separately after the system has been filled.
Automatic bleed valves must also be installed at
the next highest point in the collective lines.
NOTICE!
Glycol-tolerant air bleeding valves are neces-
sary when using media that contain glycol.
1: Manual bleeding valve
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