Viessmann VITOLADENS 300-T User manual

Installation instructions
for contractors
VIESMANN
Vitoladens 300-T
Type VW3B, 33 to 50 kW
Oil Unit condensing boiler
VITOLADENS 300-T
5729 533 GB 2/2011 Dispose after installation.

2
Please follow these safety instructions closely to prevent accidents and mate-
rial losses.
Safety instructions explained
!Please note
This symbol warns against the
risk of material losses and envi-
ronmental pollution.
Note
Details identified by the word "Note" con-
tain additional information.
Target group
These instructions are exclusively
designed for qualified personnel.
■ Work on gas appliances must only be
carried out by a qualified gas fitter.
■ Work on electrical equipment must
only be carried out by a qualified elec-
trician.
Regulations
Observe the following when working on
this system
■ all legal instructions regarding the pre-
vention of accidents,
■ all legal instructions regarding envi-
ronmental protection,
■ the Code of Practice of relevant trade
associations,
■ all current safety regulations as
defined by DIN, EN, DVGW, TRGI,
TRF, VDE and all locally applicable
standards.
■ Gas Safety (Installation & Use) Reg-
ulations
– the appropriate Building Regulation
either the Building regulations, the
Building Regulation (Scotland),
Building Regulations (Northern Ire-
land),
– the Water Fittings Regulation or
Water Bylaws in Scotland,
– the current I.E.E. Wiring Regula-
tions.
Working on the system
■ Isolate the system from the power sup-
ply and check that it is no longer 'live',
e.g. by removing a separate fuse or by
means of a mains isolator.
■ Safeguard the system against unau-
thorised reconnection.
■ When using gas as fuel, also close the
main gas shut-off valve and safeguard
against unauthorised reopening.
Safety instructions
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Preparing for installation................................................................................... 4
Installation sequence
Siting and levelling the boiler................................................................................ 6
■ Siting without DHW cylinder.............................................................................. 6
■ Siting on a plinth............................................................................................... 6
■Siting on a DHW cylinder.................................................................................. 6
Fitting the thermal insulation................................................................................ 7
Preparing to install the heat exchanger................................................................ 11
Fitting the heat exchanger to the boiler................................................................ 12
■ 33 kW................................................................................................................ 12
■ 40 and 50 kW.................................................................................................... 13
Fitting the thermal insulation................................................................................ 14
Fitting the pipework.............................................................................................. 16
Condensate connection........................................................................................ 18
Connections on the heating water side................................................................ 18
■ Flow and return................................................................................................. 18
■ Filling connection.............................................................................................. 19
Making the safety connections ............................................................................ 19
■ Low water indicator........................................................................................... 19
Making electrical connections and fitting the top panel........................................ 20
■ Connections to the control unit base................................................................. 20
Fitting boiler door and burner............................................................................... 22
■ Installing and adjusting the burner.................................................................... 22
Commissioning and adjustment........................................................................... 22
Index
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Siting
Clearance dimensions
abc
d
CBA D
ACombustion chamber
BBoiler
CDHW cylinder
DSensor well (only for Vitocell,
type EHA (350 l)
Rated output kW 33 40 50
amm 750 850 850
bmm 100 100 100
cmm 450 450 450
dmm 565 645
Preparing for installation
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≥ 250
APlinth
BSiphon
CNeutralising system
Preparing for installation (cont.)
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Siting without DHW cylinder
1. 3.
2.
Level the boiler with a slight incline
towards the back.
Note
Remove and retain the bag containing
the boiler type plate and the adjustable
feet.
The type plate is affixed to the side panel
of the thermal insulation.
Siting on a plinth
Installation instructions on the plinth packaging
Siting on a DHW cylinder
Installation instructions, system connection
Siting and levelling the boiler
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Note
All required components are included in the thermal insulation box.
8.
4.
3.
1.
2.
Fitting the thermal insulation
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Note
Balanced flue operation: Attach the ven-
tilation air line before fitting the thermal
insulation panels.
Installation instructions for acces-
sories for balanced flue opera-
tion
1.
2.
90°
3.
4.
Fitting the thermal insulation (cont.)
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Note
Boiler water temperature sensor § is supplied in the control unit packaging.
Burner cable fA is supplied in the thermal insulation packaging.
8.
8.
8.
8.
8.
1.
5.
3.
41
7.
6.
4.
3
2.
40/50 kW
AControl unit base
§Boiler water temperature sensor
fA Burner cable
Insert the boiler water temperature sen-
sor § and other sensors as far as pos-
sible into the sensor well.
Fitting the thermal insulation (cont.)
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!Please note
Damage to the capillary tubes
can impair the function of the sen-
sors. Never kink the capillary
tubes.
8.
2.
8.
2.
1.
Fitting the thermal insulation (cont.)
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1.
2.
4x
33 kW
40/50 kW
3.
A B
33 kW:
Installation position A or B, depending
whether the pipework is to be connected
(see page 16) on the l.h. or r.h. side of
the boiler.
For non-concentric flue systems (i.e.
routed separately or in parallel), select
installation position B.
40 and 50 kW:
Pipes may be connected on either side.
Tighten nuts evenly and diagonally.
Preparing to install the heat exchanger
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33 kW
Note
■Carry out the required installation work on the drain A prior to fitting the heat
exchanger.
■ Use the installation aid (rectangular hollow section) supplied for inserting the M8
screws with the cramp.
A4.
1.
2.
3.
1.
Fitting the heat exchanger to the boiler
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40 and 50 kW
Note
Carry out the required installation work on the drain A prior to fitting the heat
exchanger.
1.
2.
3.
4.
Fitting the heat exchanger to the boiler (cont.)
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1.
2.
4.
3.
A
AOnly in balanced flue operation with
coaxial flue outlet/ventilation air
inlet.
Fitting the thermal insulation
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1.
2.
4.
3.
Fitting the thermal insulation (cont.)
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4.
1.
3.
6.
5.
2.
■ Manually bend flexible pipe into the
required shape.
■ Fit all connections with matching flat
gaskets.
■ Fit the fill valve.
Note
If the pipework is to be connected on the
opposite side of the boiler, take this into
consideration when preparing for instal-
lation (see page 11).
Fitting the pipework
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4.
3.
A
4.
2.
1.
Manually bend flexible pipe into the
required shape.
Note
Fit thermal insulation section A only
after filling the system (see service
instructions) and after the system has
been checked for leaks.
Fitting the pipework (cont.)
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ASupply from the boiler
BNeutralising system or active char-
coal filter
CDrain to the drainage system
Connect the condensate drain by the
shortest route, with a constant fall and a
pipe vent to the drainage system. Install
a neutralising system if required.
Note
■ ATV-DVWK-A 251 permits boiler use
without a neutralising system when
operating with low sulphur fuel oil
DIN 51605-EL-1 (sulphur content
≤
50 mg/kg).
■ Use an active charcoal filter (acces-
sory) if not using a neutralising system.
Connections on the heating water side
Flow and return
AFilling connection
Condensate connection
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The flow and return pipes with the heat
exchanger connection can be fitted to
the r.h. or l.h. side of the boiler, subject
to where the heat exchanger is installed
(see page 11).
Connect all consumers, so that the heat
exchanger will receive a heating water
flow in any operating condition.
Note
■ Connect the heating circuits and DHW
cylinder to the common flow and
return.
■ Do not connect any consumers to the
remaining connectors at the back of
the boiler.
Filling connection
Fill the system via the fill valve that is fitted to the return connector pipe (see
page 16).
Service instructions
Making the safety connections
Installation instructions, safety
equipment block
Install the safety lines.
Permiss. operating pressure: 3 bar
Test pressure: 4 bar
Minimum cross-sections
■ Safety valve inlet connection
33 and 40 kW: DN 15 (R ½)
50 kW: DN 20 (R ¾)
■ Safety valve discharge pipe
33 and 40 kW: DN 20 (R ¾)
50 kW: DN 25 (R 1)
■ Line to the expansion vessel
33 to 50 kW: DN 20 (R ¾)
Low water indicator
Tests have verified that the low water
indicator stipulated by EN 12828 is not
required.
Note
Equip boilers with a safety valve which is
type-tested according to TRD 721 and
which must be marked in accordance
with the relevant system version.
Connections on the heating water side (cont.)
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Connections to the control unit base
Installation instructions, boiler control unit
Making electrical connections and fitting the top panel
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