STIEBEL ELTRON HPA-O 7 S Premium - HPA-O 7 S Premium | HPA-O 7 CS Premium



18 | 
 Pivot the terminal area to the side.
D0000075146
 Fix the terminal area in place with the locking mechanism.
 Connect the electric emergency/booster heater if you want to
utilise the following appliance functions:
-



Mono energetic op-
eration
If the dual mode point is undershot, the electric emer-
gency/booster heater safeguards both the heating oper-
ation and the provision of high DHW temperatures.
Emergency mode If the heat pump shuts down due to a fault, the heating
output is covered by the electric emergency/booster
heater.
Heat-up program
(only for underfloor
heating systems)
Where return temperatures are <25°C, the electric
emergency/booster heater must provide the necessary
heat for screed drying.
With such low system temperatures, the heat for screed
drying must not be provided by the heat pump, other-
wise the frost protection of the appliance can no longer
be guaranteed during the defrost cycle.
When the heat-up program has ended, the electric
emergency/booster heater can be disconnected if it is
not required for appliance operation.
Please note that during the heat-up program, emergency
mode is not available.
Pasteurisation
mode
The electric emergency/booster heater starts automat-
ically when pasteurisation mode is active. The DHW is
then regularly heated to 60°C to protect it against the
growth of legionella bacteria.
11.2 HPA-O7SPremium | HPA-O7CSPremium
 Connect the cables according to the following diagram.
BUS
X2
L
H
T
„+“
X5 / DHC X3 / WP X4 / Steuerung
N LL N L N
L
ON
-
ERR
N
3,0 kW L N PE
3,2 kW L N PE
6,2 kW L N L N PE
1/N/PE~230/50
C 32A
1/N/PE~230/50
C 16A
1/N/PE~230/50
C 20A
D0000037825
1
1 Earth terminal for screening the LV lead
X2 
BUS High H
BUS Low L
BUS earth
BUS "+" (is not connected)
X3 
L, N, PE
X4 
-
ON
ERR
Power supply: L, N, PE
X5 
L, N, L, N, PE
 
3.0kW L N PE
3.2kW L N PE
6.2kW L N L N PE
 Earth the LV lead by inverting the screen over the cable
sheath and clamping it under the earth terminal.
 Then check that the strain relief fittings are working as
intended.