KAESER TG 450, Руководство оператора, Страница: 20 / 116

2.8.1.3 Cooling water quality
Characteristics/content Closed cooling sys‐
tem
Open cooling system
pH value 7.5 – 9.0 7.5 – 9.0
General hardness [°dH] 0 – 20 0 – 20
Carbonate hardness* [°dH] <20 <4
Chlorides (Cl) [mg/l] <100 <100
Iron (Fe), dissolved [mg/l] <0.5 <0.2
Sulphate (SO
4
) [mg/l] <300 <300
HCO
3
/SO
4
ratio >1 >1
Electrical conductivity [µS/cm] 10 – 800 10 – 1500
Ammonia (NH
4
+ ) [mg/l]
<1 <1
Manganese (Mn), dissolved [mg/l] <0.1 <0.1
Glycol [%] 20 – 40 —
Solids (particle size) [mm] <0.1 <0.1
Bacterial count [CFU*/ml] 10,000 10,000
Suspended solids [ppm]
(portion of undissolved matter)
<20 <20
* CFU: colony-forming units
Tab. 12 Cooling water quality
2.9 Sound pressure level
TG 450 TG 520 TG 650 TG 780 TG 980
Sound pressure level
[dB(A)]
<70 / <70 2) <70 / <70 2) <70 / <70 2) <70 / <70 2) <70 / <70 2)
Sound pressure level as per EN ISO 11203 and basic standard ISO 9614-2 with d=1 m and
Q2=17.2 / 16.4
2) dB(A), uncertainty: ±3 dB(A)
2)
Option K2
Tab. 13 Sound pressure level
2.10 Power Supply
Basic requirements
The machine is designed for an electrical supply according to National Electric Code (NEC)
NEC-670, particulary NFPA 79, edition 2021, section 4.3. In the absence of any user-specified al‐
ternatives, the limits given in these standards must be adhered to. Consult manufacturer for any
other specific power supply.
The incoming line within the control panel should be as short as possible.
If external sensors or communication lines are to be connected to the machine, use shielded ca‐
bles and insert the same through EMC fittings into the control panel.
2 Technical Data
2.9 Sound pressure level
10
Operator Manual Refrigerated Dryer
TG
No.: 901760 02 USE