Water Connections - STIEBEL ELTRON DHX 3.5-1 Trend Operation And Installation

INSTALLATION
Installation
Install wall anchors in the wall, then insert and tighten each
mounting screw partially. Screws and plastic wall anchors for
mounting on drywall or wood are provided.
Hang the unit on the 2 mounting screws, ensuring the rear of
the unit is flush against the wall.
Once the unit is in position, mount the unit securely to the wall
by fully tightening the 2 mounting screws.

11.2 Water connections

CAUTION: DO NOT INSTALL IN A BATH ENCLOSURE OR
!
SHOWER STALL OR CONNECT TO A SALT-REGENERATED
WATER SOFTENER OR A WATER SUPPLY OF SALT
WATER
FOR USE ON AN INDIVIDUAL BRANCH CIRCUIT ONLY
CAUTION: CONNECT ONLY TO A CIRCUIT PROTECTED BY A
CLASS A GROUND FAULT CIRCUIT INTERRUPTER
USE COPPER CONDUCTORS ONLY
USE BONDING CONDUCTOR IN ACCORDANCE WITH THE
CANADIAN ELECTRICAL CODE, PART I
Material losses
!
Carry out all water connection and installation work in
accordance with regulations.
Material losses
!
Excessive heat from soldering on copper pipes near the
DHX may cause damage to the unit or the plastic filter
screen located in the cold water inlet.
NOTICE
The cold water connection to the unit MUST be discon-
nected 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.
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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 DHX Trend 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 the unit.
11.2.1 Permissible water connection materials
The DHX'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.
11.2.2 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).
11.2.3 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).
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 14. This allows the unit to be easily isolated for
maintenance purposes.
DHX Trend & DHX Plus | 15