WWW.STIEBEL-ELTRON-USA.COM CF SERIES| 7
ENGLISH
INSTALLATION
ELECTRICAL CONNECTION
6.2 Leakage check
Once all plumbing work is done, check for leaks. If necessary, take
corrective action.
7. Electrical connection
7.1 Safety
DANGER: Electrocution
Before proceeding with any installation, adjustment, al-
teration, or service of the water heater, all circuit break-
er switches servicing the appliance must be turned off.
Make sure that nobody can activate the breaker in the
distribution panel during your service work on the ap-
pliance.
DANGER: Electrocution
The appliance must be properly grounded. Failure to
electrically ground the product could result in serious
personal injury or death.
7.2 Electric supply
Check the electric supply infrastructure:
For delta configuration, a three-phase wire and a ground are sup-
plied. For a Wye configuration, a three-phase wire, a neutral, and
a ground are supplied. The configuration and voltage are declared
on the unit name plate on the enclosure front type plate.
B
A
f Feed the wire through the knockout (A) using a Romex clamp
for strain relief.
f Connect the live wires to the contactor (B).
f Pull the ground wire into the ground terminal.
7.3 Terminal block torque
To tighten wire to the terminal block, use the proper torque value
according to NEC:
Wire gauge (AWG) Torque (lb-in)
8 80
6–4 165
3 275
The appliance should be connected to a properly grounded dedicated
branch circuit of proper voltage rating. In installations with several
CF heaters, each heater requires a separate circuit with wire sizes
according to NEC.
8. Commissioning
f Close the front cover before the electric supply is turned on.
f Before the heater is activated by switching the electric supply
on, run hot water via a hot water faucet for a minimum of 3
minutes to purge all air from the system.
PLQ
1
2
D0000053277
f Turn on the circuit breaker.
f Turn on the heater via the on/off switch.
f Check the water temperature after several minutes of
operation.
f Explain the end user how the heater operates.
f Make the end user aware that hot water can cause injures if it
is more than 125 °F (52 °C).
f Draw special attention to the safety information.
f Hand over the operating manual to the end user.
9. Maintenance
DANGER: Electrocution
Before proceeding with any installation, adjustment,
alteration, or service of the appliance, all circuit break-
er switches servicing the appliance must be turned off.
Make sure that nobody can activate the breaker in the
distribution panel during your service work on the ap-
pliance.
Stiebel Eltron water heaters are designed for a very long service life.
Actual life expectancy depends on water quality and use. To ensure
consistent water flow, remove scale build up on the faucet or any
connected fixtures.
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