For air-cooled units:
• The water inlet temperature of the energy recovery system
• The water outlet temperature of the energy recovery system
For water-cooled units:
• The water inlet temperature of the energy recovery system
• The water outlet temperature of the energy recovery system
• The cooling water outlet temperature of the compressor
Modifying settings
If the programmed warning settings for the water temperatures are exceeded, a warning indication is shown
on the Elektronikon:
Temperature input Minimum
setting
Nominal
setting
Maximum
setting
Water inlet temperature of energy recovery ˚C 0 50 99
Water inlet temperature of energy recovery ˚F 32 122 210
Energy recovery water outlet temperature ˚C 0 Depends on
application
99
Energy recovery water outlet temperature ˚F 32 Depends on
application
210
To modify a setting, consult the relevant section in the description of the Elektronikon controller.
Recoverable energy
The recoverable energy can be calculated from:
RECOVERED ENERGY (kW) = 4.2 x water flow (l/s) x water temperature rise (˚C)
In the tables below, typical examples are given.
Data for low temperature rise/low water flow systems
Parameter Unit GA 55
GA 55
+
GA 75
GA 75
+
GA 90
Recoverable energy kW 48.4 50.5 66 66 79.2
Recoverable energy hp 64.9 67.7 88.5 88.5 106.2
Water flow l/min 69.3 72.3 94.5 94.5 113.4
Water flow cfm 2.45 2.55 3.34 3.34 4
Temperature at inlet ˚C 50 50 50 50 50
Temperature at inlet ˚F 122 122 122 122 122
Temperature at outlet ˚C 60 60 60 60 60
Temperature at inlet ˚F 140 140 140 140 140
Data for high temperature rise/low water flow systems
Parameter Unit GA 55
GA 55
+
GA 75
GA 75
+
GA 90
Recoverable energy kW 48.4 50.5 66 66 79.2
Instruction book
2920 7109 60 145
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