WEGER WALTER GMBH DIWER EVO DP80 Series, Installation And Operating Manual

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Installation and Operating Manual Page
49
Printed: 02/2015
Commissioning checklist
Is the filter correctly positioned in the frame?
Is the filter properly secured to the frame?
Does the filter correspond to the filter type specified in the data sheet?
For automatic roll filters: does the conveyor motor work properly?
For filters with differential pressure monitoring: are the differential pressure measuring
instruments filled with the supplied measuring medium and are the indicators correctly
configured?
7.4. Heat exchanger
Check the heat exchanger connections for leakage.
Ensure that all tray drains are equipped with siphons.
The siphon must be designed so that it prevents drying out, and with reference to the actual
static pressure.(refer to 6.4. for details) Never connect the siphon directly to the waste water
system.
FREON
In units with direct evaporators or air-cooled condenser batteries, the system must be filled
with a refrigerant. In this case, the installation of the system and the pipelines must be
performed by a qualified refrigeration technician.
During maintenance, check the evaporator for ice and leakage.
Pumped cold water, pumped hot water
Standard heating and cooling batteries are filled with water to which an anti-freeze agent and
a corrosion inhibitor are added.
- Open the bleeder valve.
- Open the water valve slightly so that the battery is filled slowly with water. This prevents
thermal stress on the system.
- As soon as the battery is filled, close the bleeder valve.
- Open the water valve fully and switch on the fan.
- Bleed the entire pipeline system.
Steam
- Open the bleeder valve and the drain valve at the condensate drain.
- Open the steam valve by a little until steam escapes at the valve.
- Close the drain valve and the bleeder valve and fully open the steam valve.
During operation, regularly check the bleeder valve.
Caution!
During prolonged standstill, ensure that no condensate is left in the pipes. In units with heaters
that have a feed temperature of over 90 °C, shut down the heating medium supply before
shutting down the unit. The fan should have a follow-up time of minimum 3 minutes.
In units with electric heating batteries, ensure that they are connected correctly. To prevent
overheating of the components, set the fan run-on time to minimum 3 to 5 minutes.