Siemens RVD230 Basic Documentation page 7

Siemens Building Technologies
HVAC Products
16.6.2 Absolute priority............................................................................................. 64
16.6.3 Shifting priority............................................................................................... 64
16.6.4 No priority ...................................................................................................... 65
16.7 Pump overrun ................................................................................................ 65
16.7.1 General.......................................................................................................... 65
16.7.2 Intermediate circuit pump .............................................................................. 65
16.7.3 Storage tank charging pump ......................................................................... 65
16.8 Frost protection for d.h.w............................................................................... 66
16.9 Switching d.h.w. heating off........................................................................... 66
17 D.h.w. heating................................................................................................ 67
17.1 D.h.w. heating with storage tanks.................................................................. 67
17.1.1 General.......................................................................................................... 67
17.1.2 Maximum charging time ................................................................................ 67
17.1.3 Manual storage tank charging ....................................................................... 67
17.1.4 Forced charging............................................................................................. 67
17.1.5 Protection against discharging ...................................................................... 68
17.1.6 D.h.w. heating with diverting valve ................................................................ 68
17.1.7 Protection against overtemperatures............................................................. 68
17.1.8 Storage tank with electric immersion heater.................................................. 68
17.2 D.h.w. heating with stratification storage tank ................................................. 69
17.2.1 General.......................................................................................................... 69
17.2.2 D.h.w. heating with one flow sensor .............................................................. 69
17.2.3 D.h.w. heating with 2 flow sensors ................................................................ 69
17.2.4 Feeding the circulating water into the heat exchanger .................................. 70
17.3 Direct d.h.w. heating...................................................................................... 70
17.3.1 General.......................................................................................................... 70
17.3.2 D.h.w. heating................................................................................................ 70
17.3.3 Protection against cooling down.................................................................... 70
17.3.4 Siting the sensors .......................................................................................... 71
17.3.5 Flow switch .................................................................................................... 71
17.3.6 Compensation of heat losses through control ............................................... 72
17.3.7 Cold water sensor.......................................................................................... 73
17.3.8 Plant type 8-4................................................................................................ 73
18 Function block Extra legionella functions ...................................................... 74
18.1 Operating lines .............................................................................................. 74
18.1.1 Legionella function......................................................................................... 74
18.1.2 Setpoint ......................................................................................................... 74
18.1.3 Time............................................................................................................... 74
18.1.4 Dwelling time ................................................................................................. 74
18.1.5 Operation of circulating pump........................................................................ 75
18.1.6 Maximum limitation of the return temperature ............................................... 75
Basic Documentation RVD230
Contents
7/130
CE1P2383en
27.05.2004