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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Description of the heating engineer settings 15.07.2002
1. Press the operating line selection buttons to select line 126.
2. Press the + / - buttons to adjust the setpoint boost.
Setting range Unit Factory setting
0...30 °C (K) 16
The setting will raise the boiler temperature setpoint when there is demand for d.h.w.
Increase: Heating up time will become shorter
More overshoot
Decrease: Heating up time will become longer
Less overshoot
Using the two settings, the controller generates the boiler temperature setpoint for
d.h.w. heating.
Setting on operating line
13
Nominal d.h.w. temperature setpoint
Setting on operating line
126
Boost
Total Boiler temperature setpoint
For d.h.w. control, refer to section "Switching differential of d.h.w. temperature” (line 41
OEM
).
4.43 D.h.w. priority
• Optimum allocation of boilers' heat output
Defines the priority of d.h.w. heating over space heating.
1. Press the operating line selection buttons to select line 127.
2. Press the + / - buttons to select the type of d.h.w. priority.
Setting range Unit Factory setting
0...3 Increment 1
During d.h.w. heating, space heating will be restricted, depending on the setting made.
Entry:
0 Absolute priority
The controller-internal heating circuit and the heating circuits of other controllers
connected to the LPB will be locked until the d.h.w. is heated up. The system
pump remains in operation.
1 Shifting priority If the capacity of the heat generating equipment is no longer
sufficient, the amount of heat supplied to the heating circuits will be restricted
until d.h.w. heating is terminated.
2 No priority: D.h.w. heating and space heating at the same time.
Setting
Effect
boiler boost
Note
Benefit
Description
Setting
Effect
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