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INSTALLATION
Commissioning
ENGLISH
www.stiebel-eltron-usa.com DHX Trend & DHX Plus | 17
11.5 Electrical connection with short power cable
If the power cable is not quite long enough, you can install the wiring
block closer to the aperture in the water heater.
f Reposition the wiring block from the top to the bottom. To do
so, unclip the wiring block by pushing it firmly to the left and
pulling it forwards.
D0000095302-b
f Clip the wiring block in at the bottom by pushing it inwards
and to the left until it clicks into place.
11.6 Wiring block
Consult the chart below for the recommended torque amounts on
the wiring block screws.
Screw Size (mm) Min. Torque (N•cm) Min. Torque (lbf•in)
M6 200-250 17.7–22.1
Using the proper torque specifications to secure wire to the wiring
block helps to avoid personal loss or property damage.
12. Commissioning
12.1 Internal anti-scalding protection via jumper slot
For increased safety, the qualified contractor can set an internal an-
ti-scalding temperature limit via the “T
max
” jumper. The anti-scald-
ing protection feature limits the maximum output temperature of
the water heater. This feature overrides the temperature adjust-
ment display on the front cover (both the temperature selection
and temperature limit via software functions). A user can still make
temperature adjustments below the anti-scalding limit using the
display, however, any temperature selected that is higher than the
Tmax limit set will be ignored, and the output temperature will be
limited to the T
max
value.
38°C | 100°F
43°C | 109°F
50°C | 122°F
60°C | 140°F
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Jumper position Description
38 °C | 100 °F Code-compliant hand washing applications (fac-
tory default setting)
43 °C | 109 °F Applications where risk of scalding may be a
concern
50 °C | 122 °F DHW for kitchen sink, utility sink, etc.
60 °C | 140 °F Commercial applications (kitchens, etc.), health
code requirements
No jumper Limit 38 °C | 100 °F
f Install the jumper in the required position on the “T
max
” pin
strip.
CAUTION Burns
If the water supplied to the water heater is preheated, the
internal anti-scalding protection and the user-adjustable
temperature limit may be exceeded.
In such cases, limit the temperature with an upstream
central thermostatic valve.
12.2 Initial start-up
Note
During initial start-up, you MUST engage the AE3 safety
switch by depressing the white reset button before supply-
ing power to the water heater. The unit will NOT operate
until the safety switch has been engaged.
PLQ
1
2
D0000053277
f Open and close all connected draw-off valves at least five times
total. Let water run for at least three minutes, until all air has
been purged from the pipework and the water heater.
f Ensure there are no water leaks from any plumbing
connections.
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