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7
Functions of the DHW circuit
Only systems Anl 1 to 3 have their own DHW heating (DHW heating in storage system with
Co5 -> Fb13 = ON).
The systems Anl 4 to 7 do not have their own DHW heating; they are, however, able to process
an external DHW demand (-> section 7.4) and to reduce an excessively high flow temperature
over a DHW forced charging in the external system (-> section 7.2).
7.1
DHW heating in the storage tank system
(Anl 1 to 3)
Operation with storage tank sensor SF1
The controller begins charging the storage tank when the water temperature measured at sen-
sor SF1 falls below the set point
DHW demand ON. The controller stops charging the storage
tank when the water temperature in the storage tank measured at sensor SF1 reaches the value
T =
DHW demand ON + Hysteresis.
The set point
Boiler set point for DHW demand determines the set point at sensor VFg.
Functions
WE
Configuration
Heating circuit with DHW heating
OFF
Co5 -> Fb13 = ON
Storage tank sensor SF1
OFF
Co4 -> Fb03 = ON
Storage tank sensor SF2
OFF
Co4 -> Fb04 = OFF
Parameters
WE
Parameter level / Range of values
Boiler set point for DHW demand
65 °C
PA4 / 20 to 120 °C
DHW demand ON
40 °C
PA4 / 20 to 90 °C
Hysteresis
5 °C
PA4 / 0 to 30 °C
44
EB 5474 EN
KW
WW
SF1
SF2
ZP
SLP
Fig. 4 · DHW heating in a storage tank system
Functions of the DHW circuit
SLP
Storage tank charging pump
SF1
Storage tank sensor 1
SF2
Storage tank sensor 2
ZP
Circulation pump
WW
Hot water
KW
Cold water
Содержание TROVIS 5474
Страница 79: ...System Anl 3 System Anl 4 EB 5474 EN 79 Electrical connection...
Страница 80: ...System Anl 5 System Anl 6 80 EB 5474 EN Electrical connection...
Страница 127: ...EB 5474 EN 127 Index Key number 1732...
Страница 129: ...EB 5474 EN 129...
Страница 130: ...130 EB 5474 EN...