STIEBEL ELTRON DHX 15 Select - Troubleshooting; Installation; Safety; General Safety Instructions

INSTALLATION
Troubleshooting
10 | DHX 15 Select www.stiebel-eltron-usa.com
7. Troubleshooting
Problem Cause Solution
The water heater will not
start despite the DHW
valve being fully open
There is no power Check to ensure circuit
breaker in breaker panel
hasn’t tripped. Reset if
necessary
The white AE3 safety
switch has not been en-
gaged during initial start-
up. Activate if necessary
(see section 12.2.1, “Initial
AE3 safety switch activa-
tion”, pg. 14). If the AE3
switch has tripped after
initial installation, contact
a qualified contractor to
fix the cause
The aerator in the tap or
the shower head is scaled
up or dirty
Clean and/or descale the
aerator or shower head
The water supply has
been interrupted
Vent the water heater and
the cold water inlet line
When hot water is being
drawn off, cold water
flows for a short period
The air detector detects
air in the water. It switch-
es off the heating output
briefly
The water heater restarts
automatically after 1min-
ute
Boiling noises are heard
during operation
The water heater has not
been vented
Vent the water heater (see
section 12.2, “Initial start-
up”, pg. 14)
The supply pressure is
too low
Ensure that the minimum
supply pressure of 26.1
psi is met, and that max
pressure doesn’t exceed
145 psi (see section 17.6,
“Data table”, pg. 19)
The required temperature
cannot be set
Internal anti-scalding pro-
tection is active
The internal anti-scalding
protection can only be
adjusted by qualified con-
tractors
If you cannot solve the problem, contact your qualified contractor.
To facilitate and speed up your inquiry, please provide the serial
number from the type plate (000000-0000-000000). For live technical
assistance, please contact us at 800.582.8423. Alternatively, you may
email us at info@stiebel-eltron-usa.com
Nr.: 000000-0000-00000
D0000094552-b
INSTALLATION
8. Safety
Only a qualified contractor should carry out installation, commis-
sioning, maintenance and repair of the water heater.
8.1 General safety instructions
We guarantee trouble-free function and operational reliability only
if original accessories and spare parts intended for the water heater
are used.
!
Material losses
Observe the maximum inlet temperature. Higher tempera-
tures may damage the water heater. You can limit the max-
imum inlet temperature by installing a central thermostatic
valve.
WARNING Electrocution
This water heater contains capacitors which are discharged
when disconnected from the power supply. The capacitor
discharge voltage may briefly exceed60VDC.
8.2 Instructions, standards and regulations
Note
Observe all applicable national and regional regulations
and instructions.
- The electrical resistivity of the water must not fall below that
stated on the type plate. In a linked water network, factor in
the lowest electrical resistivity of the water. Your water supply
utility will advise you of the electrical resistivity or conductivity
of the water in your area.
9. Water heater description
9.1 Standard delivery
The following are delivered with the water heater:
- Filter screen, factory installed in cold water inlet
- Jumper for anti-scalding protection, attached
- Jumper, spare, attached
- 2 x mounting screws
- 2 x wall anchors