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Siemens Building Technologies
HVAC Products
15.8
Frost protection for d.h.w.
The d.h.w. circuit is protected against frost. Frost protection for the d.h.w. is activated
when the d.h.w. temperature drops below 5 °C, independent of the operating mode.
The charging pump will be activated and a d.h.w. temperature of at least 5 °C main-
tained.
Frost protection is ensured
• when d.h.w. heating is ON (operating mode button
• when d.h.w. heating is OFF (operating mode button
• when the holiday function is active in one of the heating circuits (operating mode
button
flashes)
With all plant types x–4, frost protection for the d.h.w. is not possible.
15.9
Switching d.h.w. heating off
The d.h.w. functions can be deactivated by pressing button "D.h.w. heating ON / OFF"
(LED in the button not lit). Frost protection for the d.h.w. remains active; the d.h.w.
pump(s) will be deactivated.
Manual d.h.w. heating will be terminated, however.
Basic documentation RVD240
15 Function block D.h.w. heating
lit)
dark)
CE1P2384en
27.05.2004
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