Siemens RVD230 - Frost Protection for D.h.w; Switching D.h.w. Heating off

66/130
Siemens Building Technologies Basic Documentation RVD230 CE1P2383en
HVAC Products 16 Function block D.h.w. heating 27.05.2004
16.8 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 (plant types 2–11 and 2–12: the diverting valve) will be activated
and a d.h.w. temperature of at least 5 °C will be maintained.
Frost protection is ensured
• when d.h.w. heating is ON (operating mode button
lit)
• when d.h.w. heating is OFF (operating mode button
dark)
• when, in the local heating circuit, the holiday function is active (operating mode button
flashes)
• when, with the RVD230 as a primary controller, the holiday function is active in the
heating circuits of the zone controllers assigned via LPB (operating mode button
lit)
With all plant types no. x–4, frost protection for the d.h.w. is not possible.
16.9 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. charging will be terminated, however.