INSTALLATION
Installation
www.stiebel-eltron.com WPL E | WPL cool | 15
10.6.1 Flow rate with buffer cylinder
When using a buffer cylinder, in menu "SETTINGS/ HEATING/
STANDARD SETTINGS", set parameter "BUFFER OPERATION" to
"ON".
The flow rate can be adjusted using the temperature differential
of the buffer circuit. The value must not fall below the minimum
flow rate.
Maximum temperature differential on the heating side with buffer
cylinder:
1
0
2
4
6
8
10
-15 -10 -5 0 5 10 15 20 25 30
D0000063550
1 Nominal flow rate
X Outside temperature [°C]
Y Maximum temperature differential [K]
Make the settings at the circulation pump when the temper-
ature differential between the flow and return temperature
has stabilised.
Compare the resulting temperature difference between the
flow and return at the appliance with the diagram “Maxi-
mum temperature differential on the heating side with buffer
cylinder”.
Set the buffer charging pump so that the maximum tempera-
ture differential is achieved or undershot.
If the appliance will be used for DHW heating, check the set-
ting of the delivery head in DHW mode.
If necessary, adjust the delivery head setting for the DHW
primary pump.
Set the buffer charging pump and the DHW primary pump to
∆p constant.
10.7 Condensate drain
A condensate drain hose is fitted to the defrost pan to enable the
condensate to drain off. The condensate drain hose is delivered
inside the refrigeration unit.
Ensure the condensate drain hose is not kinked.
Ensure the condensate drain hose is not inserted airtight into
a drain. Unhindered drainage requires an ingress of air.
Route the hose with a continuous fall.
Use a suitable condensate pump if there is insufficient fall.
Take the building characteristics into account.
If using a condensate pump, ensure that it delivers at least 6
l/min.
10.7.1 Outdoor installation
D0000068605
1
1 Knock-out "supply line entry"
Route the condensate drain hose downwards through the
knock-out “outlet for supply pipe/cable” and out of the
appliance.
Channel the condensate into a drain or allow it to drain into a
coarse gravel soakaway. Ensure the pipework is free from the
risk of frost.
10.7.2 Indoor installation
You can route the condensate drain hose out of the appliance
towards the left through the knock-out “condensate drain outlet”
(see chapter “Specification/ Dimensions and connections/ Indoor
installation”) or downwards through the floor plate.
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