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9. Maintenance
9.1 Maintenance instructions for your safety
WARNING
Danger of accidents due to unlocked main switch
Before carrying out any maintenance work that does not require the unit to be operated, disconnect the power
supply and secure the main switch against reconnection (lock). In addition, the sign "MAINTENANCE IN
PROGRESS" should be affixed next to the main switch.
CAUTION
Legal problems due to improper operation of the unit
It is of utmost importance to comply with Regulation (EU) No 517/2014, regarding mandatory regular leakage-
check program, as described in chapter 2
NOTICE
Early breakdown due to missing maintenance activities
Carrying out the tests and check program listed below will extend the lifespan of the equipment and avoid
possible breakdowns.
Check mechanical working of the compressor. Control the absence of metallic vibrations and not too high noises
and temperatures on the compressor head during running to verify its regular working.
Check the operation of the fan.
Check the electrical alarm systems and controls.
Check the filling of the tank (visual level). If the system is filled with a glycol-mix, refill only with the same mix. Only
water will reduce the concentration of glycol.
Check that pressure, flow rate and temperature values of the hydraulic circuit are in the limits indicated on the type
label or in chapter
Technical
If the chiller is equipped with an air filter, the filter has to be changed/cleaned monthly, or, if required in a shorter
time interval.
Do a visual inspection of the condenser monthly on the external side, to see whether it is clean or not. The fins of
the condenser must not have any dust deposits or residual products or sludges on their surface.
The condenser must be cleaned in monthly intervals, or, if required in shorter time intervals.
If the chiller is equipped with a filter on the hydraulic side, the filter has to be checked/cleaned monthly, or if
required, in a shorter time interval.
To allow best operating conditions it's recommended to change the coolant mixture depending on the glycol
concentration in the following intervals:
o
every year for a glycol concentration of 20 %
o
every 2 years for a glycol concentration of 30 % or 50 %
Longer standstill of the unit requires draining of the tank and the entire hydraulic circuit. Open the ball valve (or the
plug) at the end of the draining hose to drain the circuit. When the drain operation is finished close again.
For a new installation, it is recommended to empty the hydraulic circuit. Please, refer to chapters
Commissioning
for the lifting of the unit, the connection and the start up.
It is recommended to check safety discharge valve (in the refrigerant circuit, where installed) every 24/36 months.
Leakages and/or visible scale may suggest potential malfunction.
Please familiarize with chapter
unit.
No device with internal volume greater than 25 l is installed on the refrigeration circuit, thus no further inspection
from notified bodies is required according to D.M. nr.309 – December the 1
The customer is obliged to comply with all additional local requirements.
Operating and Maintenance Instructions - Chiller - Series EB 210 - EB 440
Safety
of this document.
data.
Electrical and mechanical components
Installation
to identify the main components of the
st
2004.
© Pfannenberg GmbH
and
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