Rendamax E8.1121, Operating Instructions Manual, Page: 27 / 44

Operation
Overview of display values and settings
27
Hot water
Designation Value range Default IV
CP LOCK 00, 01 (OFF/ON) 01 = ON
PARALLEL 00, 01, 02, 03 01
HS-T DHW 00K - 50K 20K
HYST DHW 5K - 30K 5K
DHW FOLLOWUP 00 min - 30 min 00 min
THERM INPUT 00, 01 (OFF/ON) 00 = OFF
WALL HUNG 00, 01 (OFF/ON) 00 = OFF
CHARGE THROUGH 00. 01 (OFF/ON) 00 = OFF
RETURN Exit level using
Ä
~
Hinged cover OPEN Î search for
level to the right with
Ç
, open with
Ä
CP LOCK
(Charge pump lock)
The charging pump is not switched
until the heat generator temperature
exceeds the storage tank temperature
by 5K. It is switched off when the heat
generator temperature drops below the
storage tank temperature. This
prevents the storage tank from being
cooled by the heat generator when hot
water preparation starts.
PARALLEL (Pump parallel running)
00 => Hot water priority operation
The heating circuits are blocked during
hot water preparation. The mixers close
and the heating circuit pumps switch
off.
01 => HW partial priority
The heating circuits are blocked during
hot water preparation. The mixers close
and the heating circuit pumps switch
off. The mixer circuits are enabled
again when the heat generator has
reached the temperature of hot water
set tempe heat generator
superheating [DHW-TEMP + HS-T
DHW]. If the heat generator
temperature drops below the enable
temperature by the switching hysteresis
[HYST DHW], the mixer circuits are
blocked again.
02 => Pump parallel running
Only the direct heating circuits are
blocked during hot water preparation.
The mixer circuits continue to be
heated. The hot water preparation is
extended by this function.
03 => Pump parallel running also
for the direct heating circuit:
During hot water preparation all heater
circuits continue to be heated. The hot
water preparation is extended by this
function. When the heat generator
temperature exceeds the maximum
flow temperature of the direct heating
circuit by 8K, the heating circuit pump
for this circuit is switched off
(overheating protection). The heating
circuit pump has already been switched
on again when the heat generator
temperature drops below the
temperature [maximum flow
tempe 5K].
HS-T DHW
(Heat generator superheating during
hot water preparation)
Heat generator set temperature during
hot water preparation = Hot water set
tempe HS-T DHW
!
The heat generator must be run at
a higher temperature during hot
water preparation so that the hot
water temperature in the storage
tank can be reached via the heat
exchanger.
HYST DHW (Hot water charging
hysteresis)
Hot water preparation is started when
the temperature of the hot water
storage tank drops below the
temperature setting by the hysteresis
[HYST DHW]. The hot water
preparation stops when the storage
tank reaches the temperature setting
(the temperature setting is set to 65°C
during hot water short time heating
operation).
DHW FOLLOWUP (pump run-down
time)
00 min => Standard function
The charging pump continues to run for
5 minutes after the burner has switched
off. If heat is requested by a heating
circuit the run-down is cancelled.
The charge pump blocking kicks in and
can also cause the run-down function
to be cancelled.
greater than 00 min => => The charge
pump runs down by the set time when
storage tank charging is complete.
The after-run can only be cancelled by
means of the activated charge pump
blocking.
THERM INPUT (storage tank with
thermostat)
00 => Hot water preparation via storage
tank sensor
01 => Hot water preparation via
thermostat:
The hot water preparation is started by
a short circuit at the storage tank
sensor connecting terminals. It stops
when the short circuit is removed.
WALL HUNG (for modulating HG)
Heat generator set temperature during
hot water preparation = Storage tank
actual tempe HS-T DHW
With this function the exhaust gas
losses occurring during hot water
preparation can be reduced with
modulating heat generator using the
adapted heat generator set
temperature.
CHARGE THROUGH
DHW-TEMP = Temperature of hot
water storage tank at outlet area
Storage tank charging
ON: DHW-TEMP < RATED DHW-T -
HYST DHW
OFF: DHW-T-LOWER > RATED
DHW-T
Charging the storage tank is stopped
when the storage tank set temperature
is measured at the lower sensor.
!
If this function is activated, the
auxiliary functions with sensor
integration ("EXPERT =>
SYSTEM“, parameter "RELAY
FUNC 1“ => 20-32) are not
possible