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English
9 Technical Data
Model
7(035$b% 7(035$b% 7(035$b% 7(035$b%
7(035$bb3OXV 7(035$bb3OXV 7(035$bb3OXV 7(035$bb3OXV 7(035$bb3OXV 7(035$bb3OXV
Phase 1 1 1 1 1 1
Voltage V 208 240 208 240 208 240 208 240 208 240 208 240
Wattage kW 9 12 10.8 14.4 14.4 19.2 18 24 21.6 28.8 27 36
Max. amp, load A 44 50 2 x 26 2 x 30 2 x 35 2 x 40 2 x 44 2 x 50 3 x 35 3 x 40 3 x 44 3 x 50
Min. required circuit brea-
ker size
A 60 60 2 x 40 2 x 40 2 x 50 2 x 50 2 x 60 2 x 60 3 x 50 3 x 50 3 x 60 3 x 60
Required wire size AWG COPPER 6 6 2 x 8 2 x 8 2 x 8 2 x 8 2 x 6 2 x 6 3 x 8 3 x 8 3 x 6 3 x 6
Inlet temperature, max. °F (°C) 131 (55)
Water flow to activate unit tGPM (tl/min) 0.37 (1.4) 0.58 (2.2) 0.58 (2.2) 0.58 (2.2) 0.87 (3.3) 0.87 (3.3)
Nominal water volume GAL (l) 0.13 (0.5) 0.26 (1.0) 0.26 (1.0) 0.26 (1.0) 0.39 (1.5) 0.39 (1.5)
Working pressure, max. PSI (bar) 145 (10)
Tested to pressure PSI (bar) 290 (20)
Weight lbs. (kg) 13.2 (6.1) 15.4 (7.3) 15.4 (7.3) 15.4 (7.3) 17.6 (8.6) 17.6 (8.6)
Dimensions
height
depth
width
inch (mm)
14 1/2 (369)
4 5/8 (117)
16 5/8 (420)
Water connections NPT 3/4"
– Tankless water heaters are considered a non-continuous load
– Conductors should be sized to maintain a voltage drop of less than 3 % under load
10 Troubleshooting
Symptom 3RVVLEOHFDXVH 6ROXWLRQ
No hot water
– circuit breakers off
– safety thermal cut-out tripped
– not enough flow rate to activate unit
– turn circuit breakers on
– reset safety thermal cut-out
– clean filter screen at unit
– clean faucet aerator or shower head
Not enough hot water – filter screen clogged – clean filter screen at unit
Water not hot enough
– water flow rate too high
– voltage too low
– reduce water flow rate until power light on front
cover stops blinking
– supply correct voltage to unit
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.
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