Expert area
Part 2: Overview of display values and settings
52
Solar/MF
Designation Value
range
Default
IV
FUNC RELAY (1-4) 00 - 26
00,00,01,02
T-MF(1-4) SETP
30°C - 90°C
30°C
MF(1-4) HYST
2K – 10K
5 K
F15 FUNCTION
00 - 03
00
RETURN
Exit level using
Ä
Auxiliary relay functions
The multifunction relays = MF relay is assigned one basic
function 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 described 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 connected 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.
FUNC RELAY 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
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)
Содержание E8.5064 V1
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