Dhw Heating - Stiebel Eltron SHP-F 220 Premium Utilisation Et Installation

OPERATION
Appliance description
If a compressor is required, the appliance does not start the
compressor immediately; only once the fan's initial runtime has
elapsed. During the fan's initial runtime the appliance checks if all
the conditions required to start the compressor have been met.
Note
Following an interruption of the power supply, the
compressor operation remains blocked for at least one
minute. The PCB delays electronic starting by a minute,
during which the appliance goes through its initialising
process.
If the compressor subsequently fails to start, it may be
locked out by additional safety devices (motor overload
relay or high pressure switch). This block should lift after
1 to 10 minutes.
After the power supply has been re-established, the ap-
pliance continues to operate with the parameters that
were selected before the power supply was interrupted.
3.2

DHW heating

1
2
1 Cylinder top sensor
2 Integral sensor
The appliance is equipped with two temperature sensors.
- The cylinder top sensor captures the water temperature in
the upper section of the cylinder.
- The integral sensor is a temperature sensor affixed over the
entire cylinder height. The integral sensor determines the
average cylinder temperature.
The appliance display indicates the temperature in the upper sec-
tion of the cylinder, which is captured by the cylinder top sensor.
The appliance control unit uses the average cylinder temperature
captured by the integral sensor.
DHW heating is started when the average cylinder temperature
has fallen and the cylinder holds only 40 % of the thermal energy
it held when it was heated fully to the set temperature.
The temperature captured by the sensor at the cylinder top may
still correspond to the set temperature.
For information on the heat-up time, see chapter "Specification".
The calculation of the available amount of mixed water is based
on the average cylinder temperature. The amount of mixed water
is only calculated if the water temperature in the upper section of
the cylinder is higher than 40 °C.
DHW is normally heated by the heat pump of the appliance within
the application limits (see chapter "Specification / Data table").
Electric emergency/booster heater
Heat pump operation will be interrupted if the application lim-
its are exceeded or undershot in heat pump mode. The electric
emergency/booster heater takes over DHW heating to the selected
6 | SHP-F 220-300 Premium
set temperature. Once the appliance is back within the application
limits, the electric emergency/booster heater switches off and
DHW heating continues with the heat pump.
In the event of an appliance fault, the electric emergency/booster
heater can be activated in emergency mode if the symbol "ser-
vice/fault" is flashing. See chapter "Operation/'Rapid heat-up' key/
Emergency heating mode".
In the event of a higher hot water demand on a single occasion,
use the rapid heat-up key to activate the emergency/booster heat-
er manually for one-off heat-up in addition to the heat pump. See
chapter "Operation/'Rapid heat-up' key/Rapid/comfort heating".
Set temperature adjustment subject to air temperature
If the temperature of the intake air is low, the maximum hot gas
temperature may be reached. In this case the appliance reduces
the set temperature on a temporary basis. Whilst the appliance
is operating at a reduced set temperature, the symbol for set
temperature adjustment is shown in the display.
Runtime-dependent rapid heat-up
The appliance offers runtime-dependent rapid heat-up for im-
proved comfort. When this function is enabled, and the adjusted
set temperature is not reached by the heat pump after a user-de-
fined period, the appliance switches on the electric emergency/
booster heater in parallel. As a factory default, this function is
disabled.
When the air intake temperature drops, the heat pump's heating
output is reduced and the heat-up time is extended. In the case
of installation with outdoor air intake, we recommend enabling
"runtime-dependent rapid heat-up" during the winter months and
as required in spring/autumn when outside temperatures are low.
Note that DHW heating with the electric emergency/booster heater
uses more power than just using the heat pump.
To prevent excessive power consumption, disable the function in
summer and in spring/autumn if at all possible. When the function
is activated, we recommend only reducing the factory preset of 8
hours if absolutely necessary for the same reason.
SHP-F 300 X Premium: Connection of an external heat
generator
Material losses
!
Even if an external heat generator is connected, do not
disconnect the appliance from the power supply as oth-
erwise it is not protected against frost and corrosion. The
power supply must not be interrupted even in winter,
when it is possible that DHW heating is only being pro-
vided via the external heat generator.
The appliance is equipped with an integral smooth tube heat ex-
changer to which an external heat generator can be connected
(e.g. a solar thermal system or central heating system). The DHW
cylinder has sensor wells available for this in various positions.
Once during commissioning, the qualified contractor must match
the controls between the appliance and the external heat gen-
erator.
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