Aerator Installation At Connected Faucet; Electrical Connection - Stiebel Eltron DHC 3/3.5-1 Trend Manual Del Usuario

INSTALLATION
Installation
NOTICE
The cold water connection to the unit MUST be disconnected
periodically in order to clean the filter screen. It is required
to use water connections that are easily detachable such as
braided steel flex connectors.
NOTICE
Hard water or water with a high mineral count may dam-
age the unit. Damage to the unit caused by scale or a high
mineral count is not covered under the warranty.
NOTICE
Tankless water heaters such as the DHC Trend are not re-
quired 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 the unit.
10.2.1 Permissible water connection materials
The DHC's hot water outlet (left) 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 (right) 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 braided
steel flex connector with a ½˝ female NPT connection.
Material losses
!
If plastic pipework systems are used, take into account the
maximum inlet temperature and the maximum permissible
pressure.
10.2.2 Flow rate
Ensure that the minimum activation flow rate for switching on
the water heater is met: 0.264 gal (1.0 l/min).
If the required minimum activation flow rate is not met when
the draw-off valve is fully opened, increase the water line pres-
sure. Minimum supply pressure is 26.1 psi (1.8 bar).
10.2.3 Water connection instructions
Material losses
!
If soldering near the unit is necessary, please direct the
flame away from the housing of the unit in order to avoid
damage. Note that excessive heat from soldering (not rec-
ommended) near the cold water inlet fitting may damage
the plastic filter screen located inside it.
All plumbing work must comply with national and applicable state
and local plumbing codes.
Cold water connection (inlet) is on the right side of the unit, hot
water connection (outlet) is on the left side of unit.
A pressure reducing valve must be installed if the cold water
supply pressure exceeds 150 psi (10 bar).
10 | DHC Trend
Make certain that the cold water supply line has been flushed
to remove any scale and dirt.
Install shut-off valve in cold water line as shown in the illus-
tration on page 8. This allows the unit to be easily isolated for
maintenance purposes.
Connected braided steel flex connectors (recommended for hot
outlet, required for cold inlet, not supplied) to the twin ½˝ NPT
male connectors.
Open the shut-off valve in the cold water inlet line.
When all plumbing work is completed, check for leaks and take
corrective action before proceeding.

10.3 Aerator installation at connected faucet

DHC 3/3.5-1 Trend ships with a 0.5 gpm (1.9 l/min) pressure com-
pensating flow-reducer/aerator that must be installed on the faucet
the water heater is connected to. Failure to install the aerator may
result in lower water temperatures than desired.
DHC 4/6-2 Trend ships with a 1.0 gpm (3.8 l/min) aerator and
2 x 0.5 gpm (1.9 l/min) aerators, allowing for maximum installation
flexibility. A single 0.5 gpm or 1.0 gpm aerator (depending on re-
quired temperature rise) should be installed when the unit is used
at the [low] power output setting (jumper position 1). At the [high]
power output setting (factory default, jumper position 2), the unit
may be plumbed to a single sink using the 1.0 gpm aerator, or to two
sinks using the 2 x 0.5 gpm aerators. Failure to install the aerator(s)
may result in lower water temperatures than desired.

10.4 Electrical connection

WARNING: Electrocution
Before beginning any work on the electric installation,
be sure that main breaker panel switches are "Off" to
avoid any danger of electric shock. All mounting and
plumbing must be completed before proceeding with
electrical hook-up.
The unit must be properly grounded in accordance with
state and local codes, or in absence of such codes, in
accordance with national electric code or the Canadian
electric code. Failure to electrically ground the product
could result in serious personal injury or death.
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