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14 | Product description
2.8.7
Conditions for hydraulic system and water quality
Operating conditions
Operating pressure
(overpressure)
Permissible site test pressure
Safety temperature limitation by
TR temperature control
Safety temperature limitation by
manual reset high limit (STB)
Water quality
Table 12 System configuration and water quality
6 720 648 162 (2011/08)
Notes – Requirement in greater detail
15 – 58 psi
Maximum 30 psi (2 bar) with the supplied safety valve.
(1,0 - 4,0 bar)
45 – 75 psi
(3,1 - 5,2 bar)
122 – 194 °F
(50 - 90 °C)
212 – 248 °F
On some controls adjustable on site from 212 (100 °C) to 248 °F (120 °C).
(100 - 120 °C)
The heating system may only be filled and topped up with water of domestic water quality.
−
We recommend a pH value of 8.2 – 9.5.
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