REMKO RVS 130 DC, Инструкции по эксплуатации и монтажу

Страница: 23 / 44

Anti-freeze protection (accessories)
As a medium for a cold water
system, a water-glycol mixture
is used as a rule. Depending on
the use to which the glycol type
and quantity is put, the viscosity
changes, the loss in pressure
increases and the unit's cooling
or heating capacity reduces.
All system components must be
approved for use with glycol.
As a rule, the addition to the
water of ethylene glycol, in a
proportion of 34%, with inhibitors
for corrosion protection is
recommended.
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.
The unit's standard equipment includes
one diaphragm expansion vessel.
The preliminary pressure must be set
on the system; an increase in volume
or, in the event of the realisation of a
cooling-heating system, the installation
of another diaphragm expansion vessel
may be necessary.
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.
The standard scope of delivery
for the unit includes a safety
valve; an additional valve may
be necessary at a suitable point.
Compensators
Compensators are used to connect
lines to the unit to prevent vibration
in the chiller from transmitting
to other system components.
Compensators
Shut-off valve Compensator
Static fasten-
ing Unit connection
Air bleeding valves
The unit has manual air bleeding
valves. The unit can be bled here
after the system has been filled.
Automatic bleeding valves must
also be installed at the highest
point in the collector line.
Dirt trap
A rinsable dirt trap must be
installed upstream from the unit
intake. The mesh size should not
be less than 10 mesh/cm². Shut-
off valves should be installed
upstream and downstream from
the dirt trap.
External medium storage tank
If, for example, the required
capacity of the cold water
consumer is significantly less
than the cooling capacity
generated by the chiller, an
increase in the medium content
is recommended. As an example,
the medium piping can be
oversized or an additional
storage tank installed to increase
compressor operating time.
A storage tank should, as a rule,
be provided if the minimum
medium volume is not reached.
Shut-off valves
As a rule, in cold water systems,
shut-off valves with full admission
should be used. For the purpose
of servicing, medium inlet and
medium outlet must be equipped
with shut-off valves (if necessary
safety valves).
Glycol-tolerant air bleeding
valves are necessary when
using media that contain
glycol.
CAUTION
!
Improperly installed or missing
dirt traps can cause fouling
of the plate heat exchanger.
CAUTION
!
During use and
disposal, product and safety
data sheets for the glycol
type being used as well
as applicable local ordinances
(e.g. Water Resources Act)
must be observed.
CAUTION
!
Use the required type and
mix ratio appropriate for
the application area to ensure
the freezing point.
CAUTION
!
23