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FB Function WE Anl Comments
9 Parallel pump
operation
OFF 2, 3,
9
FB9 = ON: Parallel pump operation
Select (Anl 2 and 9):
PU: Parallel pump operation
US: Operation with switchover valve
Function block parameter (on selecting: US):
Stop parallel oper. in case of deviation / 2 to 10 min (10 min)
FB9 = OFF: Intermediate heating after 20 min
Select (FB9 = ON, US or FB9 = OFF):
20: Intermediate heating after 20 min
– –: No intermediate heating
10 Control mode
three-step RK1
ON All FB10 = ON: Three-step signal control mode
Function block parameters:
K
P
(proportional gain) / 0,1 to 50 (0,5)
T
N
(reset time) / 1 to 999 s (200 s)
T
Y
(valve transit time) / 15, 30, 45 to 240 s (90 s)
Pump lag time/1xT
Y
to 10 x T
Y
(2xT
Y
)
FB10 = OFF: On/off control; when FB10 = OFF also FB11 = OFF
Function block parameter:
Hysteresis / 1 to 30 °C (5 °C)
11 Limit deviation for
OPEN signal RK1
OFF All FB11 = ON, only when FB10 = ON: Limitation active
Function block parameter:
Max. deviation / 2 to 10 °C (2 °C)
12 Limit deviation for
OPEN signal RK2
OFF 4
to
11
FB12 = ON, only when FB17 = ON: Limitation active
Function block parameter:
Max. deviation / 2 to 10 °C (2 °C)
13 Room sensor RF OFF All FB13 = ON: Sensor/remote operation activated
Cannot be selected when FB0, FB1 or FB2 = ON;
when FB0, FB1 and FB2 = OFF the room temperature is only
indicated and not used for the control
14 Storage tank sensor
SF1
ON 2, 3,
5, 7,
8, 9,
11
FB14 = ON: Sensor SF1 activated
Storage tank thermostat: FB14 = FB15 = OFF
15 Storage tank sensor
SF2
ON
with
3, 5,
8,11
2, 3,
4, 5,
7, 8,
9,11
FB15 = ON: Sensor SF2 activated
Select: --: Settings for plants with DHW heating in storage tank
charging system with 2 storage tank sensors
CF: Activated for solar circuit
Storage tank thermostat: FB14 = FB15 = OFF
82 EB 5476 EN
Appendix