Troubleshooting; Flow Adjustment Screw; Safety Thermal Cut-Out Reset Button - STIEBEL ELTRON DHC 3-1 Classic Operation And Installation

INSTALLATION

TROUBLESHOOTING

9. Troubleshooting
Symptom
No hot water but audible click can be heard when
water is turned on.
No hot water and no audible click can be heard when
water is turned on
Water not warm enough
If you are not able to resolve a problem please contact us toll free
at 800.582.8423 before removing the unit from the wall.
Stiebel Eltron is happy to provide technical assistance. In most in-
stances, we can resolve the problem over the phone.
9.1

Flow adjustment screw

To lower the water temperature or increase water flow, open the
flow adjustment screw by turning counterclockwise
creases the water temperature by increasing water volume.
To raise the water temperature or reduce water flow, close the flow
adjustment screw by turning clockwise
temperature by decreasing water volume.
8 | DHC CLASSIC
Possible cause
Circuit breaker off
Safety thermal cut-out tripped
Heater may be undersized
Water flow too low to activate flow switch
Water flow too high
Voltage too low
(-)
. This de-
(+)
. This increases the water
Solution
Circuit breaker on
Reset thermal cut-out
See 11.3, "Temperature increase above ambient water tem-
perature", pg. 10
Clean faucet aerator
Open shut-off valve completely
Increase flow by opening flow adjustment screw (turn coun-
terclockwise)
Clean filter screen at DHC unit. See 10, "Normal maintenance",
pg. 9
Reduce water flow by closing flow adjustment screw (turn
clockwise). See 11.3, "Temperature increase above ambient
water temperature", pg. 10
Supply correct voltage to unit
9.2

Safety thermal cut-out reset button

DANGER: Electrocution
Do not attempt to reset the safety thermal cutout of this
water heater unless power to the unit has been com-
pletely shut off at the circuit breakers.
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