Technical Data; Troubleshooting; Spare Parts - STIEBEL ELTRON DHC 3-1 Installation Instructions Manual

Technical Data

Model
Phase
Voltage
Wattage
Ampere
Min. required circuit breaker size A 30
Recommended wire size
AWG COPPER 8
Min. water flow
to activate unit GPM / l/min 0.32 / 1.2
Pressure loss in unit PSI / bar 2.88 / 0.23
Nominal water volume
Working pressure max.
Tested to pressure
Weight lbs. / kg 4.6 / 2.1
Water connections
– Suitable for supply with cold water
– Tankless water heaters are considered a non-continuous load
– Conductors should be sized to maintain a voltage drop of less than 3 % under load

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 instances, we can resolve the problem over the phone.

Spare parts

No. Spare part
1 Heating system
2 Flow switch
3 Thermostat
4 Switch
5 Housing (back)
6 Plumbing connection
7 Housing (front)
8 Safety thermal cut out
9 Wiring block
10 Copper tube
11 Module chassis
12 Wire strain relief clamp
8
DHC 3-1 DHC 3-2
1 1
V 120 208
kW 3.0 2.5
A 25 12
15
14
0.32 / 1.2
2.88 / 0.23
5.3 / 2.4
Possible cause
– circuit breaker off
– safety thermal cut-out tripped
– water flow too low to activate flow switch
– water flow too high
– voltage too low
Model DHC 3-1 DHC 3-2
16 58 89 16 77 69
16 52 73 16 52 73
16 24 72
16 80 26
16 58 91
16 58 93
16 58 92
16 24 74
16 22 02 16 50 49
16 23 14
16 24 62
05 57 54
DHC 4-2 DHC 4-3
1 1
240 208 240 277
3.3 2.9 3.8 4.5
14 14 16 17
20 20 20 20
12 12 12 12
0.42 / 1.6 0.42 / 1.6
2.88 / 0.23 2.88 / 0.23
0.13 GAL / 0.5 l
150 PSI / 10 bar
300 PSI / 20 bar
5.3 / 2.4 4.6 / 2.1
1/2" NPT
DHC 4-2 DHC 4-3
16 77 70 16 58 90
16 21 62 16 21 62
DHC 5-2 DHC 8-2
1 1
208 240 208 240
3.6 4.8 5.4 7.2
18 20 26 30
30 30
40 40
10 10
8 8
0.42 / 1.6 0.69 / 2.6
2.88 / 0.23 3.13 / 0.25
4.6 / 2.1 5.3 / 2.4
Solution
– circuit breaker on
– reset thermal cut-out .
– clean faucet aerator
– open shut-off valve completely
– open flow adjustment screw
– clean filter screen at DHC unit
– reduce water flow, close flow adjustment
screw
– supply correct voltage to unit
DHC 5-2 DHC 8-2
16 77 71 16 77 72
16 21 62 16 21 64
DHC 10-2
1
208 240
7.2 9.6
35 40
40 50
8 8
0.79 / 3.0
3.75 / 0.30
5.3 / 2.4
DHC 10-2
16 77 73
16 21 65