Kampmann Katherm QK nano, Assembly And Installation Instructions Manual, Page: 5 / 32

5
Katherm QK nano –
Ultra-small trench heater with EC tangential fan
4.42
Ready-to-install convector-based floor trenches
Assembly and installation instructions
Limits of operation and use
Limits of operation
Min./max. water temperature
°C 15-90
Min./max. air intake temperature °C 15-40
Min./max. air humidity % 15-75
Max. operating pressure bar 10
Min./max. glycol percentage % 25-50
Water quality
pH value
*1
8-9
Conductivity
*1
µS/cm < 700
Oxygen content (O
2
) mg/l < 0.1
Hardness °dH 4-8.5
Sulphur ions (S)
not measurable
Sodium ions (Na
+
) mg/l < 100
Iron ions (Fe
2+
,Fe
3+
) mg/l < 0.1
Manganese ions (Mn
2+
) mg/l <0.05
Ammonia ions (NH
4+
) mg/l < 0.1
Chlorine ions (Cl) mg/l < 100
CO
2
ppm < 50
Sulphate ions (SO
4
2-
) mg/l < 50
Nitrite ions (NO
2
-
) mg/l < 50
Nitrate ions (NO
3
-
) mg/l < 50
We would refer to VDI-2035 Sheets 1 & 2, DIN EN 14336 and DIN EN
14868 with regard to the properties of the medium used to protect the
equipment. The following values provide further guidance.
The water used should be free of contamination, such as suspended
substances and reactive substances.