Water Connections; Electrical Connection - Stiebel Eltron DHC-E 8 Utilisation Et Installation

INSTALLATION

WATER CONNECTIONS

7. Water connections
Damage to the appliance and the environment:
!
Excessive heat from soldering on copper pipes near the
DHC may cause damage.
All plumbing work must comply with national and applicable
state and local plumbing codes.
A pressure reducing valve must be installed if the cold water
supply pressure exceeds 150 psi (10 bar).
Make certain that the cold water supply line has been flushed
to remove any scale and dirt.
Install an isolating valve in the cold water line as shown in
the diagram in section 6.1 "Mounting the appliance", pg.
5. This allows the appliance to be isolated for maintenance
purposes.
Cold water connection (inlet) is on the right side of the ap-
pliance, hot water connection (outlet) is on the left side of
appliance.
Tankless water heaters such as the DHC-E are not required to
be equipped with a Temperature and Pressure Relief Valve
(T&P). If the local inspector will not pass the installation
without a T&P, it should be installed on the hot water outlet
side of appliance.
The DHC-E's hot water outlet is designed for connection to
copper tubing, PEX tubing or a braided stainless steel hose
with a ½˝ NPT female tapered thread.
The plumbing on the cold water inlet side needs to be such
that it can easily be removed to allow access to the inlet filter
screen. The easiest way to achieve this is to use a stainless
steel braided hose connector. If soldering near the unit is
necessary, please direct the flame away from the housing of
the unit in order to avoid damage.
When all plumbing work is completed, check for leaks and
take corrective action before proceeding.
8.

Electrical connection

DANGER: Electrocution
Carry out all electrical connection and installation work
in accordance with relevant regulations.
DANGER: Electrocution
Only use a permanent connection to the power supply.
The appliance must be able to be separated from the
power supply by an isolator that disconnects all poles
with at least 1/8˝ (3 mm) contact separation.
DANGER: Electrocution
Before beginning any work on the electric installa-
tion, be sure that main breaker panel switch is "off"
to avoid any danger of electric shock. All mounting and
plumbing must be completed before proceeding with
electrical hook-up. Where required by local, state or
national electrical codes the circuit should be equipped
with a "ground fault interrupter".
6 | DHC-E
DANGER: Electrocution
As with any electric appliance. failure to electrically
ground appliance may result in serious injury or death.
Damage to the appliance and the environment:
!
Observe the type plate. The specified voltage must match
the mains voltage.
The appliance should be connected to a properly grounded
dedicated branch circuit of proper voltage rating. In installa-
tions with several appliances, each appliance requires an
independent circuit. Please refer to the technical data table
for the correct wire and circuit breaker size.
The wire must be fed through the rubber seal located be-
tween the hot and cold water connections. Then feed wires
through strain relief clamp and tighten clamp down on wire.
The "live" wires must be connected to the slots on the ter-
minal block marked L and L (L and N). The ground wire must
be connected to slot marked with the ground symbol. Strain
relief clamp with screws and rubber seal are provided.
8.1 DHC-E 8/10 switchable power output
For the DHC-E 8/10 model, the power output is adjustable in 2
stages. The factory default setting is Stage 1 (7.2 kW @ 240 V).
1 coding plug
If the heater needs to be installed with a different power output,
take the following steps:
Insert the coding plug to select the desired power output.
Stage 1 208 V
5.4 kW
Stage 2 208 V
7.2 kW
Mark the selected power output and voltage on the type plate
with a permanent marker.
4˝ (100 mm)
1
220 V 230 V 240 V
6.0 kW 6.6 kW 7.2 kW
220 V 230 V 240 V
8.1 kW 8.8 kW 9.6 kW
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