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Installation level
Input of the basic setting
28
Solar/MF
Designation Value
range
Default
IV
RELAY FUNC (1-4) 00 - 26
00,00,01,02
T-MF(1-4) SETP
30 °C - 90 °C 30 °C
MF(1-4) HYST
2 K - 10 K
5 K
F15 FUNCTION
00 - 03
00
See following pages for continuation
Auxiliary relay functions
The multifunction relays = MF relay is assigned one basic func-
tion respectively
MF-1: Mixer HC1 OPEN (FUNC RELAY 1 = 00)
MF-2: Mixer HC1 CLOSED (FUNC RELAY 2 = 00)
MF-3: Header pump (FUNC RELAY 3 = 01)
MF-4: Circulation (time) (FUNC RELAY 4 = 02)
If this basic function of a MF relay is not required (configuration of
the installation in Installation level), any one of the functions de-
scribed below may be selected for any unused relay.
The MF-relay 1 - 4 (A8-A11) 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 con-
nected as F17 (connector III, Pin 2 + 3).
The functions that may be selected for the MF relays 1 - 4 are
described using MF relay 1 as an example.
RELAY FUNC 1
(function selection relay MF1)
T-MF1 SETP
(switching temperature relay MF1)
MF 1 HYST
(hysteresis relay MF1)
00 = No MF function
01 = Header 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 circula-
tion pump
03 = Booster pump
ON: When heat is requested by an internal consumer
OFF: When no heat is requested by an internal consumer. Fol-
low-up pump action occurs.
05 = Pump HS1
The relay may be used to control boiler pump for heat genera-
tor 1.
(Relay switches with burner relay 1; run-down = 5 min)