Cooling Circuit; Air Volume Over Evaporator - Dantherm DanX AF Series User Manual

4. COMMISSIONING

4.4. Cooling circuit

To commission the cooling circuit for the first time, the following actions have to be taken:
•
Check if the drain pipes have been installed correctly (see 3.6.1) and if the drip tray
inside the unit is clean.
•
Check that all loss parts/accessories have been removed from the inside of the unit.
•
Start up the compressor(s) and check if the HP and LP gauge are showing reasonable
temperatures.
•
Check the sight glass of the cooling circuit if there is enough refrigerant in the unit. If
refrigerant is missing stop the compressor(s) at once and check for a leakages /
damages.
1. Compressor
2. Evaporator
3. Condenser
4. Expansion valve
5. Receiver
6. Dry filter
8. Sight glass
9. HP/LP gauge
10. LP Pressostat
11. HP Pressostat
12. Safety valve
13. Water cooled cond.

4.4.1 Air volume over evaporator

Over the evaporator you will find a hand operated air damper, which gives you the possibility
to regulate the air volume over the evaporator which has an influence on the evaporating
temperature. If you run the unit without an outdoor damper and the standard air volume,
please open the damper over the evaporator fully. If you use an outdoor damper please do
the following to find the right damper position over the evaporator:
•
Run the unit with the outdoor air damper closed and the damper over the evaporator
fully open for about 5 minutes. Read the evaporation temperature / pressure on the LP
gauge.
•
Open now the out door damper, run the unit again for 5 minutes and watch the LP
gauge. If the evaporation temperature / pressure have fallen you have to close the
damper over the evaporator slowly until you have reached about the same
temperature / pressure as with the out door damper closed.
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