Rendamax E8.1121, Operating Instructions Manual, Page: 25 / 44

Auxiliary relay functions
The sensor 1 (connector VIII,
pin 1+2) is assigned to the relay 1
(temperature -controlled) (also see
page 7). If a further sensor is required
for a function, this sensor must be
connected to connector III, pin 2+3.
Functions which do not require a
sensor are assigned to relay 2
(timer-controlled).
RELAY FUNC 1 (function selection
relay 1)
!
If the parameter "CHARGE-
THROUGH" is activated at the
level EXPERT=>HOT WATER, the
additional functions with sensor
integration are not possible
(function 20 – 32)
T-RELAIS 1 (Switching temperature
relay 1)
HYST RELAYS 1
(Hysteresis relay 1)
00 = no 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 is effective after
the heat generator is switched on.
02 = Circulation (time)
The circulation pump is switched on
according to the circulation or hot water
program (parameter "CIRCL-P-DHW“
at the level USER=>HOT WATER).
03 = Booster pump
ON: In the event of a heating request
from an internal consumer OFF:
Without internal consumer heating
request A pump after-run occurs.
Operation
Overview of display values and settings
Installation
Designation Value range Default IV
RELAY FUNC 1 00 - 32 02
RELAY-TEMP 1 30°C – 90°C 30°C
HYST RELAY1 2K – 10K 5K
RELAY FUNC 2 00 - 06 00
RETURN Exit level using
Ä
05 = Pump heat generator 1
When using the controller to control two
heat generators the relay may be used
to control the heat generator pump for
heat generator 1.
(Relay switches with burner relay 1;
run-down =5 min)
06 = HS pump heat generator 2
When using the controller to control two
heat generators the relay may be used
to control the heat generator pump for
heat generator 2.
(Relay switches with burner relay 2;
run-down =5 min)
20 = Temperature-controlled
circulation pump
CIRCL TEMP = Return flow tempera-
ture of circulation line
ON: T-CIRCL < T- RELAY1
OFF: T-CIRCL > [T- HYST
RELAY1]
The circulation pump is switched on
when the return flow temperature drops
below the set limit temperature
(T-RELAY 1).The pump is switched off
again when the return flow temperature
exceeds the set limit temperature by
the Hysteresis (HYST RELAY1).
The set circulation program and the
"Circulation with hot water" setting
have an overriding function
=> Switching on only takes place
during enable periods.
21 = Pulsed circulation pump
ON: In the event of short circuit at
multifunction sensor input
OFF: After 5 minutes
If a short-cut occurs at the multifunction
sensor input the circulation pump is
switched on for 5 minutes. Switching on
takes place on the edge (once only).
The set circulation program and the
"Circulation with hot water" setting
have an overriding function
=> Switching on only takes place
during enable periods.
22 = Integration of the heat
generator for solid fuel
SOLID FUEL-T = Temperature of the
heat generator for solid fuel
BUFFER-T-LOW = Temperature of
the storage tank at the inlet area
(connector III, pin 2+3)
ON:
SOLID FUEL-T >
[BUFFER-T-LOW + HYST
RELAY 1 + 5K]
OFF: SOLID FUEL-T <
[BUFFER-T-LOW
+ HYST
RELAY 1]
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