Viessmann VITOCELL 300-H Operating instructions

Service instructions
for contractors
VIESMANN
Vitocell 300-H
Type EHA
DHW cylinder with internal indirect coil
160 to 500 l
VITOCELL 300-H
5677315 GB 9/2019 Please keep safe.

2
Please follow these safety instruc-
tions closely to prevent accidents
and material losses.
Safety instructions explained
Danger
This symbol warns against the risk
of injury.
!Please note
This symbol warns against the risk
of material losses and environmen-
tal pollution.
Note
Details identified by the word "Note"
contain additional information.
Target group
These instructions are exclusively inten-
ded for qualified contractors.
■Work on electrical equipment may only
be carried out by a qualified electrician.
■The system must be commissioned by
the system installer or a qualified per-
son authorised by the installer.
Regulations to be observed
■National installation regulations
■Statutory regulations for the prevention
of accidents
■Statutory regulations for environmental
protection
■Codes of practice of the relevant trade
associations
■Relevant country-specific safety regu-
lations
Working on the system
■Isolate the system from the power sup-
ply (e.g. by removing the separate fuse
or by means of a mains isolator) and
check that it is no longer live.
■Safeguard the system against recon-
nection.
!Please note
Electronic assemblies can be dam-
aged by electrostatic discharge.
Prior to commencing any work,
touch earthed objects such as heat-
ing or water pipes to discharge
static loads.
Danger
Hot surfaces can cause burns.
■Before maintenance and service
work, switch OFF the appliance
and let it cool down.
■Never touch the hot surfaces of
uninsulated pipes and fittings.
Safety instructions
Safety instructions
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Danger
Floors that are wet or damp with
water or glycol based liquids can
cause injury due to slipping and fall-
ing.
■Keep the floor clean and dry dur-
ing installation and maintenance
work.
■Wear non-slip shoes.
Danger
Broken-off fragments of insulation
material can cause death by suffo-
cation if inhaled or swallowed.
■Do not let children play in the
installation room.
■Keep the installation room clean
after installation and maintenance
work.
Repair work
!Please note
Repairing components that fulfil a
safety function can compromise the
safe operation of the system.
Replace faulty components only
with genuine Viessmann spare
parts.
Auxiliary components, spare and wearing parts
!Please note
Spare and wearing parts that have
not been tested together with the
system can compromise its func-
tion. Installing non-authorised com-
ponents and making non-approved
modifications or conversions can
compromise safety and may invalid-
ate our warranty.
For replacements, use only original
spare parts supplied or approved by
Viessmann.
Safety instructions
Safety instructions (cont.)
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1. Information Symbols ................................................................................................. 5
Intended use .......................................................................................... 5
Product information ................................................................................ 6
Inspection and maintenance .................................................................. 6
System examples .................................................................................. 6
Spare parts lists ..................................................................................... 6
2. Commissioning, inspec-
tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 7
3. Commissioning/service
reports
................................................................................................................ 10
4. Specification ................................................................................................................ 11
5. Appendix Final decommissioning and disposal ..................................................... 12
6. Declaration of Conformity ................................................................................................................ 13
Index
Index
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Symbol Meaning
Reference to other document containing
further information
1.
Step in a diagram:
The numbers correspond to the order in
which the steps are carried out.
Warning of material losses and environ-
mental pollution
Live electrical area
Pay particular attention.
■Component must audibly click into place.
or
■Acoustic signal
■Fit new component.
or
■In conjunction with a tool: Clean the sur-
face.
Dispose of component correctly.
Dispose of component at a suitable collec-
tion point. Do not dispose of component in
domestic waste.
The steps in connection with commissioning, inspec-
tion and maintenance are found in the "Commission-
ing, inspection and maintenance" section and identified
as follows:
Symbol Meaning
Steps required during commissioning
Not required during commissioning
Steps required during inspection
Not required during inspection
Steps required during maintenance
Not required during maintenance
Intended use
The appliance is only intended to be installed and
operated in sealed unvented systems that comply with
EN 12828 / DIN 1988, or solar thermal systems that
comply with EN 12977, with due attention paid to the
associated installation, service and operating instruc-
tions. DHW cylinders are only designed to store and
heat water of potable water quality. Heating water buf-
fer cylinders are only designed to hold fill water of pot-
able water quality. Only operate solar collectors with
the heat transfer medium approved by the manufac-
turer.
Intended use presupposes that a fixed installation in
conjunction with permissible, system-specific compo-
nents has been carried out.
Commercial or industrial usage for a purpose other
than heating the building or DHW shall be deemed
inappropriate.
Any usage beyond this must be approved by the man-
ufacturer for the individual case.
Incorrect usage or operation of the appliance (e.g. the
appliance being opened by the system user) is prohibi-
ted and results in an exclusion of liability.
Incorrect usage also occurs if the components in the
system are modified from their intended use (e.g.
through direct DHW heating in the collector).
Adhere to statutory regulations, especially concerning
the hygiene of potable water.
Information
Symbols
5677315
Information

6
Suitable for systems to DIN 1988, EN 12828 and
DIN 4753
160 and 200 l cylinder capacity:
Stainless steel DHW cylinder with internal indirect coil
for DHW heating in conjunction with boilers
350 and 500 l cylinder capacity:
Stainless steel DHW cylinder with internal indirect coil
for DHW heating in conjunction with boilers, district
heating systems and low temperature heating systems
Inspection and maintenance
DIN 1988 requires a visual inspection and (if neces-
sary) cleaning no later than 2 years after the cylinder
has been commissioned, and thereafter according to
requirements.
System examples
Available system examples: See www.viessmann-
schemes.com.
Spare parts lists
Information about spare parts can be found on the
Viessmann spare parts app.
Information
Product information
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Information

7
Commissioning steps
Inspection steps
Maintenance steps Page
•1. Filling the DHW cylinder...................................................................................................... 8
• • 2. Shutting down the system
• • 3. Checking the safety valve function
• • 4. Cleaning the inside of the DHW cylinder........................................................................... 8
• • 5. Returning the DHW cylinder to use.................................................................................... 9
• • 6. Checking the connections on the water side for tightness
• • 7. For 350 and 500 l: Checking the sensor well for leaks
•8. Instructing the system user................................................................................................ 9
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance
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1. Fill the DHW cylinder on the DHW side.
Note
The cylinder cap does not need to be tightened.
2. Check the fittings on the heating water and DHW
sides for leaks and tighten if required.
3. For 350 and 500 l:
Check the sensor well for leaks and tighten if
required.
4. Check the function of the safety valves according
to the manufacturer's instructions.
Shutting down the system
Checking the safety valve function
Cleaning the inside of the DHW cylinder
Danger
Unchecked leakage of DHW or heating water
can result in scalding and structural damage.
Only open the DHW and heating water connec-
tions after the DHW cylinder has been depres-
surised.
FA B CE G
D
Fig. 1
1. Drain the DHW cylinder on the DHW side.
2. Remove front panel A, thermal insulation mat B,
thermal insulation ring C and thermometer
sensor D.
3. Remove cap E, stainless steel circular blank F
and gasket G.
4. Disconnect the DHW cylinder from the pipework to
prevent cleaning agents and contaminants from
entering the pipework.
5. Remove loose deposits with a pressure cleaner.
!Please note
Pointed or sharp cleaning tools will damage
the cylinder interior.
Only use plastic cleaning equipment to clean
the inside.
6. Use a chemical cleaning agent to remove hard
deposits that cannot be removed with a pressure
cleaner.
!Please note
Cleaning agents containing hydrochloric acid
will attack the DHW cylinder material.
Never use such cleaning agents.
Danger
Cleaning agent residues can cause poison-
ing.
Always observe the information provided by
the cleaning agent manufacturer.
7. Fully drain all cleaning agent.
8. Flush the DHW cylinder thoroughly after cleaning.
Commissioning, inspection, maintenance
Filling the DHW cylinder
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A B CEFG
D
Fig. 2
1. Reconnect the DHW cylinder to the pipework.
2. Insert new gasket G at cap E.
3. Mount cap E with stainless steel circular blank F
and gasket G, and tighten with 160 Nm torque.
4. Fill the DHW cylinder on the DHW side.
5. Fit thermal insulation ring C, thermometer
sensor D, thermal insulation mat B and front
panel A.
Checking the connections on the water side for tightness
For 350 and 500 l: Checking the sensor well for leaks
Instructing the system user
The installer should instruct the user in the operation of
the system.
Commissioning, inspection, maintenance
Returning the DHW cylinder to use
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Commissioning Maintenance/service Maintenance/service
Date:
By:
Maintenance/service Maintenance/service Maintenance/service
Date:
By:
Maintenance/service Maintenance/service Maintenance/service
Date:
By:
Maintenance/service Maintenance/service Maintenance/service
Date:
By:
Maintenance/service Maintenance/service Maintenance/service
Date:
By:
Commissioning/service reports
Commissioning/service reports
5677315
Appendix