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
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.
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 the lead time set
by qualified contractor for the fan, and checks whether the con-
ditions 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 the lead time set by
qualified contractor for the fan, and checks whether the conditions
for restarting the compressor have been fulfilled. If the air temper-
ature 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 (approx.
1 K).
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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.
3.5

Frost protection

The appliance activates a frost protection function if the temper-
ature captured by the integral sensor is below a certain limit. See
chapter "Specification / Appliance parameters". The appliance then
heats the water by means of the heat pump and the electric emer-
gency/booster heater. The heat pump and electric emergency/
booster heater switch off when the temperature 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
automation systems, the following conditions must be
adhered to:
- 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 fuse protection requirements (see chapter
"Specification / Data table").
SHP-F 220-300 Premium | 7