Part 4: Installation and Start-up
Commissioning
57
Designation Value
range
Standard
IV
MF (1-4) Func
00 – 34
00,00,01,02
T-MF(1-4) Setpoint
30°C – 90°C
30°C
MF(1-4) Hyst
2K – 10K
5K
MF(1-4) Hyst Off
2K – 10K
2K
F15 Function
00 – 05
00
BUS ID HC1
00 – 15
01
BUS ID HC2
00 – 15
02
5k Sensors
5k, 1k
5k
Auxiliary relay functions
The multifunction relays = MF relay is assigned one basic
function respectively
MF-1: Mixing Valve HC1 OPEN (MF 1 Func = 00)
MF-2: Mixing Valve HC1 CLOSED (MF 2 Func = 00)
MF-3: Collector pump (MF 3 Func = 01)
MF-4: Circulation (time) (MF 4 Func = 02)
If this basic function of a MF relay is not required
(configuration of the installation in Installation level), any
one of the functions described below may be selected for
any unused relay.
The MF-relay 1-4 (A8-A12) is always assigned with a
sensor 1-4 (F11-F14) (applies for functions starting from
"20" only). If a further sensor is required for a function,
this sensor must be connected as F17
(connector III, Pin 2+3).
Must be observed!
!
Operation as 1144: Selectable MF functions => 02,
03, 12, 13, 20, 21, 24, 25, 33, 34
!
Operation as 1144: The circulation pump is not
started automatically during the Hot water short
time heating function.
!
If an MF solar function (07, 08, 09, 23, 27, 28, 29)
is activated, no further external solar controller may
be connected.
The functions that may be selected for the MF relays 1-
4 are described using MF relay 1 as an example.
MF 1 Func
(function selection relay MF1)
00 = No MF function
01 = Collector pump
ON: When heat is requested by a consumer
OFF: Without consumer heat request
If at least one consumer in the system requests heat the
pump is switched on. The after-run function runs after the
burner has been switched on.
02 = Circulation (time)
Switching the relay according to the time program for the
circulation pump
03 = Booster pump
ON: When heat is requested by an internal consumer
OFF: When no heat is requested by an internal
consumer. Follow-up pump action occurs.
05 = Pump HS1
The relay may be used to control boiler pump for heat
generator 1.
(Relay switches with burner relay 1; run-down =5 min)
06 = Pump HS2
The relay may be used to control boiler pump for heat
generator 2.
(Relay switches with burner relay 2; run-down =5 min)
07 = Switch-over valve Storage 2 (buffer)
The valve changes solar production over from hot-water
tank to buffer storage if it is not possible for any more
collectors to feed the hot-water tank.
08 = Switch-over valve Storage 3 (swimming pool)
!
The F15 function must stand on 5.
The valve changes solar production over from buffer
storage to storage tank 3 [F15] if it is not possible for any
more collectors to feed the buffer storage.
09 = Switch-over valve Storage 3 (swimming pool)
!
The F15 function must stand on 5.
(only for systems without solar buffer charging)
The valve switches the solar production from the hot-
water tank to Storage 3 [F15] as soon as no collector is
able to charge into the hot-water tank.
12 = Remote-controlled output Heatcircuit 1
The relay can be switched from the control unit of the
heating circuit via the BUS (for function, refer to control
unit manual).
13 = Remote-controlled output Heatcircuit 2
The relay can be switched from the control unit of the
heating circuit via the BUS (for function, refer to control
unit manual).
14 = Not used
15 = Not used
16 = Not used
17 = Not used
18 = Not used
19 = Not used
20 = Temperature-controlled circulation pump
T-CIRCL = Return flow temperature of circulation line
ON: T-CIRCL < T-MF1 SETPOINT
OFF: T-CIRCL > [T-MF1 SE MF 1 HYST]
The circulation pump is switched on when the return flow
temperature drops below the temperature setting limit (T-
MF1 SETPOINT).
The pump is switched off again when the return flow
temperature exceeds the set limit temperature by the
Hysteresis (MF 1 HYST).
The set circulation program and the "Circulation with hot
water" setting have an overriding function
=> Switching on only takes place during enable periods.