sauter EQJW145, Operating Manual

Page: 32 / 110

EQJW145: Heating controller
Commissioning
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7010015003 A
© Fr. Sauter AG
Maximum permitted DHW temperature
This SERVice parameter is used to impose an upper limit on the temperature
for domestic hot water, which can be set with the lower rotary switch. If the
rotary knob used to set the values is turned further to the right (increase
values) although the upper limit value has already been reached, the display
will automatically show the lowest value, which is increased again.
Switching difference DHW
The tank charge is not started as soon as the target temperature for the
DHW is undercut, but when the switching difference that was set here (e.g.
5K) has been undercut. This prevents a fresh charge having to be carried out
shortly after a charge has finished.
Maximum permitted increased DHW temperature
This SERVice parameter is used to set an upper limit for the increased
temperature for domestic hot water, which can be set with the lower rotary
switch. If the rotary knob used to set the values is turned further to the right
(increase values) although the upper limit value has already been reached,
the display will automatically show the lowest value, which is increased
again.
Setpoint boost for domestic hot water
The heating temperature must be higher than the desired tank temperature
for the domestic hot water, otherwise minor temperature losses during
heating would mean that the tank heating never ends. This SERVice
parameter specifies the amount by which the heating temperature should
exceed the desired tank tempe switching difference.
Outdoor temperature limit value for operation of domestic hot water heating
Depending on the outdoor temperature, the EQJW 145 determines whether
heating of the domestic hot water tank is carried out as a priority - i.e. the
heating medium pump is switched off during heating - or in parallel. If the
measured outdoor temperature is below the limit value set with the help of
SP39, parallel operation of heating and tank heating is implemented. If the
outdoor temperature is higher than this limit value, domestic hot water
heating is implemented with priority. If value –30°C is set for SP39, parallel
operation is generally disabled.
After-run time for charge pump for domestic hot water
After the desired tank temperature has been reached, the charge pump is not
switched off immediately. Instead, it continues running for a period that can
be set here (in minutes). In this way, for example, a flow temperature that is
too high for the heating circuit can be reduced. The after-run time for the
charge pump is interrupted prematurely if TFi TWi + 2K or TFi TFs for the
heating circuit.
SP35
SP36
SP37
SP38
SP39
SP40