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5.3 Water connections
Damage to the appliance and the environment
Excessive heat from soldering on copper pipes near the DHC
may cause damage.
f All plumbing work must comply with national and applicable
state and local plumbing codes.
f A pressure reducing valve must be installed if the cold water
supply pressure exceeds 150 PSI (10 bar).
f Make certain that the cold water supply line has been flushed
to remove any scale and dirt.
f Install isolating valve in cold water line as shown in illustration
“Mounting the appliance”. This allows the appliance to be iso-
lated for maintenance purposes.
f Cold water connection (inlet) is on the right side of the ap-
pliance, hot water connection (outlet) is on the left side of
appliance.
f Tankless water heaters such as the DHC-E are not required to
be equipped with a Pressure and Temperature Relief Valve
(P&T). If the local inspector will not pass the installation with-
out a P&T, it should be installed on the hot water outlet side of
appliance.
f The appliance is designed for connection to copper tubing, PEX
tubing or a braided stainless steel hose with a ½“ NPT female
tapered thread. If soldering near the appliance is necessary,
please direct the flame away from the plastic housing of the
appliance in order to avoid damage.
f When all plumbing work is completed, check for leaks and take
corrective action before proceeding.
6. Electrical connection
DANGER Electrocution
Carry out all electrical connection and installation work in
accordance with relevant regulations.
Damage to the appliance and the environment
Observe the type plate. The specified voltage must match
the mains voltage.
DANGER Electrocution
Before beginning any work on the electric installation,
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“.
DANGER Electrocution
As with any electric appliance. failure to electrically ground
appliance may result in serious injury or death.
f The appliance should be connected to a properly grounded
dedicated branch circuit of proper voltage rating. In installa-
tions with several appliance, each appliance requires an inde-
pendent circuit. Please refer to the technical data table for the
correct wire and circuit breaker size.
26_02_02_1084
f 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 terminal
block marked L and L. The ground wire must be connected to
slot marked with the ground symbol. Strain relief clamp with
screws and rubber seal are provided.
6.1 DHC-E 8/10 - Appliance with output power op-
tions
For the DHC-E 8/10 instantaneous water heater, the output power
is adjustable in 2 stages. In its delivered condition the appliance is
set to 7.2 kW@240 V.
1
26_02_02_1088
1 coding plug
If the appliance should be installed with a different output power,
take the following steps:
f Select the output power:
1 = 7.2 kW @ 240 V;
2 = 9.6kW @ 240V.
f Set coding plug on the appliance according to the output power
selected. For rated current and fuse, see specification.
f Mark the selected output power on the type
plate with a per-
manent marker.
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