Intended Use; Product Information - Viessmann EHE Installation And Service Instructions For Contractors

Intended use

This appliance may only be used for auxiliary domestic
hot water heating in sealed unvented vessels (DHW
cylinders). Due to its design, the appliance may only
be installed and operated in a horizontal position.
When operational, the heating rods and sensor tube
must be completely surrounded by domestic hot water
on all sides. Do not impede the natural thermal water
flow. The technical limits specified in these instructions
must be observed.
The appliance is only intended to be installed and
operated in sealed unvented systems that comply with
EN 12 828/DIN 1988, with due attention paid to the
associated installation, service and operating instruc-
tions. DHW cylinders are exclusively designed to hold
fill water of potable quality.
Intended use presupposes that a fixed installation in
conjunction with permissible, system-specific compo-
nents has been carried out.

Product information

Immersion heater EHE
■ Compliant with EN 60335-1 (VDE 0700-1), VDE
0700-253 and respective country-specific standards,
e.g. ÖVE and SEV
■ For heating domestic hot water
Note
Only use the immersion heater EHE with very soft to
medium hard water up to 2.5 mol/m
Max. ambient temperature at the casing: 35 °C
■
Unheated section: approx. 130 mm from sealing face
■
■ For installation in a DHW cylinder under the following
conditions:
– Min. 200 l water content
– Water inlet and outlet pipes must be made of
metal.
All metal parts that come into contact with water
–
must be permanently and securely connected to
the earth conductor.
■ The safety valve must be installed in accordance
with the installation instructions of the manufacturer
and of the DHW cylinder.
Temperature controller:
■
Note
–
To prevent rapid scale build-up on the immersion
heater EHE, we recommend setting the tempera-
ture controller to max. 60 °C (marking on the rotary
selector).
Setting range of the temperature controller:
–
approx. 34 to 75 °C.
– Temperature in frost protection mode: approx.
10 °C.
– Start-up: approx. 34 °C.
Commercial or industrial use for purposes other than
domestic hot water heating shall be deemed inappro-
priate.
Any usage beyond this must be approved by the man-
ufacturer in each individual case.
Incorrect usage or operation of the appliance (e.g. the
appliance being opened by the system user) is prohibi-
ted and will result in an exclusion of liability.
Incorrect usage also occurs if the components in the
system are modified from their intended function.
Adhere to statutory regulations, especially concerning
the hygiene of potable water.
!
3 (14 °dH).
Minimum clearance
When siting the DHW cylinder, ensure there is suffi-
■
cient clearance to install the immersion heater EHE.
■ Allow for the installed length of the immersion heater
EHE plus 150 mm.
Product information
Please note
Temperatures above 90 °C will trigger the high
limit safety cut-out of the immersion heater EHE.
When using the immersion heater EHE in a
DHW cylinder with integral indirect coil, limit the
temperature introduced by the indirect coil to
90 °C.
DHW cylinder installation instructions
3