Appliance Operation Outside The Application Limits; Defrosting; Frost Protection; Minimum Runtime And Minimum Pause Time - Stiebel Eltron SHP-F 220 Premium Utilisation Et Installation

OPERATION
Appliance description
3.3 Appliance operation outside the application
limits
f To guarantee fault-free operation of the appliance, make sure f
you operate the appliance within its application limits (see
chapter "Specification / Data table").
3.3.1 Application limits for heat pump operation
Air intake temperature lower than the application limit
If the air intake temperature falls below the lower application
limit, the appliance blocks the compressor. The compressor sym-
bol flashes. This means the compressor receives a DHW demand,
but the compressor is blocked by the control unit. Heating oper-
ation is now only possible with the electric /emergency booster
heater.
After one hour, the appliance starts the fan for two minutes and
checks whether the conditions for restarting the compressor have
been fulfilled. If the air temperature is higher by the hysteresis
value than the lower application limit, the compressor is released
for operation.
The electric emergency/booster heater remains operational until
the set DHW temperature is reached or until the lower application
limit is exceeded by the hysteresis value (approx. 1 K).
Air intake temperature higher than the application limit
If the air intake temperature exceeds the higher application limit,
the appliance blocks the compressor. Heating operation is now
only possible with the electric /emergency booster heater. After
one hour, the appliance starts the fan for two minutes and checks
whether the conditions for restarting the compressor have been
fulfilled. If the air temperature is lower by the hysteresis value
than the higher application limit, the compressor is released for
operation.
The electric emergency/booster heater remains operational until
the set DHW temperature is reached or until the temperature falls
below the higher application limit by the hysteresis value (ap-
prox. 1 K).
3.4

Defrosting

Low air intake temperatures may result in the formation of hoar
frost on the evaporator, subject to relative humidity and DHW
temperature. The appliance is equipped with an electronic de-
frost monitor. DHW heating is interrupted during the defrosting
process. The appliance switches off the fan during the defrosting
process. The compressor continues to run. The defrosting process
is shown on the appliance display.
A maximum defrost time is stored in the appliance. If the maxi-
mum defrost time is exceeded, the appliance stops the defrosting
process and releases the electric emergency/booster heater.
Note
Heat-up times are longer while the evaporator is defrost-
ing.
Note
The appliance starts the defrosting process as soon as
the compressor runtime reaches the "Defrost required"
time span stored in the appliance.
www.stiebel-eltron.com
3.5

Frost protection

The appliance activates the frost protection function if the integral
sensor in the DHW cylinder captures a temperature below 10 °C.
The appliance then heats the water by means of the heat pump
and the electric emergency/booster heater. The heat pump and
electric emergency/booster heater switch off when the tempera-
ture captured by the integral sensor reaches 18 °C.
3.6

Minimum runtime and minimum pause time

Material losses
!
When operating with external switching devices that can
interrupt the power supply to the appliance, such as time
switches, energy management systems or home automa-
tion systems, observe the following conditions:
- The minimum ON time is 60 minutes.
- The minimum pause time following a shutdown is
20 minutes.
- The appliance should not be switched on/off more
than 10 times per day.
- The breaking capacity of the switching actuator
must meet the protection requirements (see chapter
"Specification / Data table").
3.7

Connection of an external signal transmitter

Note
This type of connection must only be carried out by a
qualified electrician.
External signal transmitters can be integrated via the built-in con-
tact input, e.g. a PV system to make use of solar power generated
on site.
The appliance has a second set temperature preselected at the
factory. This is activated in the event of an external switching
signal. Set temperature 2 is higher ranking than the standard set
temperature while there is an external switching signal. Following
a one-off activation (signal is present for at least 1 minute), set
temperature 2 applies for at least 20 minutes and is ranked higher
than set temperature 1.
You can change set temperature 2 on the appliance (see chapter
"Settings/Settings/Set temperature 2").
SHP-F 220-300 Premium | 7