Adapting the unit to the heating installation 8
0020149561_01 ecoCRAFT exclusive Installation and maintenance instructions
21
+
▶
Press the
i
and
+
buttons simultaneously or wait 4
minutes before pressing any buttons.
◁
The current heating flow temperature or (if this option
has been selected) heating installation filling pressure
will reappear on the display.
8.2
Setting the maximum flow temperature
You can set the maximum flow temperature for heating
mode under
D.71
.
You can set the maximum flow temperature for cylinder char-
ging mode under
D.78
.
8.3
Setting the pump overrun and pump
operating mode
You can set the pump overrun time under
D.01
.
You can set the pump overrun for a cylinder charging pump
that is directly connected to the product under
D.72
.
If the cylinder charging pump is connected to a VRC 630/700
or VRS 620 control, set the overrun time on the control.
You can set the
Eco
(intermittent) or
Comfort
(continuous)
pump operating modes under
D.18
.
In
Comfort
mode, the external heat generator pump is
switched on if:
–
The room temperature control requests heat via terminal
3-4-5
and
–
The room temperature control or built-in control specify
a target value for the flow temperature via terminal 7-8-9
that is greater than 30 °C or via eBUS that is greater than
20 °C
and
–
The product is in winter mode (the rotary knob for the
heating flow temperature is not at the anti-clockwise end
stop)
and
–
The surface-mounted thermostat is closed.
The pump is switched off if:
–
One of the above-mentioned conditions is no longer be-
ing met
and
–
The pump overrun has ended.
The burner anti-cycling time has no effect on the pump. If
one of these conditions is missing during the overrun time,
this time ends regardless.
Eco
is useful for removing residual heat after domestic hot
water generation when the heat demand is extremely low
and large target temperature spreads exist between the do-
mestic hot water generation and heating mode target val-
ues. This prevents living rooms from being under-supplied.
If there is a heat demand, the pump is switched on for five
minutes within 30 minutes in each case once the overrun
time has elapsed .
If a temperature sensor is connected in the return:
If the return temperature for the heating water drops rapidly,
the pump runs (within those 30 minutes) for longer than the
minimum running time of five minutes. The "intermittent"
operating mode can be interrupted at any time by starting
the burner, and the pump runs in the normal heating mode.
8.4
Setting the burner anti-cycling time and
partial load
To prevent frequent switching on and off of the burner and
thus prevent energy losses, an electronic restart lockout
is activated for a specific period each time the burner is
switched off. You can adjust the burner anti-cycling time to
the conditions of the heating installation. The burner anti-
cycling time is only active for the heating mode. You can set
the maximum burner anti-cycling time under
D.02
.
The product is equipped with an automatic heating and cyl-
inder charging partial load control. If diagnostics codes
D.00
or
D.77
are at the maximum value, the relevant partial load is
optimised using the current burner running times. After an in-
terruption in the mains voltage supply or after the
fault clear-
ance
key is pressed, the value that is currently determined is
reset to the maximum output in order to ensure that setting
and test processes can take place. The heating partial load
can be fixed under
D.00
and the cylinder partial load can be
fixed under
D.77
. The automatic function is then not active if
a value smaller than the maximum value is set.
8.5
Start-up behaviour
When there is a heat requirement, the product goes into the
status
S.02
(pump pre-run) for approx. 15 seconds and then
the fan is started (
S.01 ... S.03
).
After reaching the start-up speed, the gas valve is opened
and the burner starts (
S.04
).
The product is now operated at minimum output for 30 to 60
seconds, depending on the boiler temperature. Depending
on the target value deviation, the calculated target speed is
then set.
8.6
Handing the product over to the operator
1.
When you have finished the installation, attach the
sticker supplied (835593) to the front of the product in
the operator's language.
2.
Explain to the operator how the safety devices work and
where they are located.
3.
Inform the operator how to handle the product. Answer
any questions the operator may have. Draw special
attention to the safety instructions which the operator
must follow.
4.
Inform the operator of the necessity to have the product
maintained according to the specified intervals.
5.
Pass all of the instructions and documentation for the
product to the operator for safe-keeping.
6.
Inform the operator about measures taken to ensure the
supply of combustion air and flue gas guiding, and in-
struct the operator that he must not make any changes.
7.
Make the operator aware of the need to keep the in-
structions near the product.
