D.h.w. Priority; Frost Protection For The Plant - Siemens RVA63.280 Basic Documentation

Benefit
Setting
Effect
108/184
Siemens Building Technologies
Landis & Staefa Division
2.42

D.h.w. priority

Optimum distribution of heat.
Setting range
0...3
During d.h.w. heating, space heating will be restricted, depending on the setting made.
0 Absolute priority
Mixing and pump heating circuit remain locked until the d.h.w. is heated up, the
system pump remains activated.
1 Shifting priority
If the capacity of the heat source is no longer sufficient, mixing and pump
heating circuit will be restricted until the d.h.w. is heated up.
2 No priority: D.h.w. heating and space heating at the same time.
In the case of tightly sized boilers and mixing heating circuits, the setpoint may
not be reached if the heating load is great, since too much heat is required for
space heating.
3 Mixing heating circuit shifting, pump heating circuit absolute
The pump heating circuits remain locked until the d.h.w. storage tank is heated
up. If the capacity of the heat source is no longer sufficient, the mixing heating
circuits will also be restricted.
2.42.1

Frost protection for the plant

Frost protection for the plant is fully active only in the case of setting 2. With
setting 0 or 1, it will be partly or fully restricted. If the boiler is correctly sized,
frost protection for the plant is also ensured when using setting 1. In the case of
plants where there is a considerable risk of frost (e.g. plants with outdoor
heating), setting 0 should not be used.
Basic Dokumentation RVA63.280, RVA53.280
Unit
Increment
Factory setting
1
CE1P2374E
19.04.2001