Viessmann VITODENS 050-W User manual

5685058 GB 8/2017 Dispose after installation.
Installation instructions
for contractors
VIESMANN
Converting the gas type from natural gas to LPG
for Vitodens 050-W
Safety instructions
Please follow these safety instructions 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 envi-
ronmental pollution.
Note
Details identified by the word "Note"
contain additional information.
Installation, initial start-up, inspection,
maintenance and repairs must only be
carried out by a competent person
(heating engineer/installation contrac-
tor).
Before working on the equipment/heat-
ing system, isolate the power supply
(e.g. by removing a separate mains
fuse or by means of a mains isolator)
and safeguard against unauthorised
reconnection.
When using gas as fuel, also close the
main gas shut-off valve and safeguard
against unauthorised reopening.
Repairing components which fulfil a
safety function can compromise the
safe operation of your heating system.
For replacements, use only original
spare parts supplied or approved by
Viessmann.
Opening the Vitodens
Installation and service instruc-
tions
Replacing the gas train

2
CH
D
AG
F
B
E
GC
D
Note
The Vitodens may be equipped with different gas train versions.
■Pressure die cast casing A
■Bolted casing B
1. Pull cable from gas train.
2. Undo union nut H and remove old
gas gasket.
3. Undo 2 screws C and remove gas
train.
4. For boilers equipped with gas train
A, insert new gasket D with cor-
rect new gas restrictor F for the
relevant gas type from the conver-
sion kit.
!Please note
Ensure the gas restrictor is
fitted correctly.
If equipped with gas train B (bol-
ted casing), insert new gasket D
with gas restrictor E from the con-
version kit for the relevant gas type.
Converting the gas type to LPG P (G31)
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5. Mount gas train with new gas gas-
ket G.
Torque for fixing screws C: 6 Nm
Torque for union nut B: 30 Nm
6. Start the boiler.
7. Check all gas connections for tight-
ness.
Danger
Escaping gas leads to a risk
of explosion.
Check all gas equipment for
tightness.
!Please note
The use of leak detection
spray can result in faulty
operation.
Leak detection spray must
not come into contact with
electrical contacts or seal
the diaphragm opening on
the gas valve.
Changing the gas type at the control unit
1. Turn on the ON/OFF switch.
2. Press MODE and simultaneously
and hold for 3 s.
"SERV" appears on the display
and "I" flashes.
3. Use / to select "5" and confirm
with OK.
"0" flashes on the display.
4. Use / to select "1" and confirm
with OK.
The burner has been converted to
operation with LPG.
5. Press MODE and simultaneously
and hold for 3 s.
Service mode is terminated. Serv-
ice mode also terminates automati-
cally after 30 min.
6. Turn the ON/OFF switch off and on
again.
The selected gas type is now ena-
bled.
Converting the gas type to LPG P (G31) (cont.)
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A
1. Connect a flue gas analyser at flue
gas port A on the boiler flue con-
nection.
2. Start the boiler.
3. To check the CO2 content the
burner output can be adjusted man-
ually.
Set the burner output at the boiler
control unit:
1. Press MODE.
2. / repeatedly until "SERV"
appears.
3. Press OK to confirm.
"OFF" appears on the display.
4. Use / to adjust the burner out-
put:
Display
shows
Burner out-
put
_ 20 20 %
_ _ 40 40 %
_ _ _ 60 60 %
_ _ _ _ 80 80 %
_ _ _ _ _ 100 100 %
5. Confirm your settings with OK.
Checking the CO2 content
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4. Set the higher heating output
(100 %) and check the CO2 con-
tent.
The CO2 content must be within the
following range for the respective
gas type. See table.
Gas type CO2 content
in %
E (G20) 7.5 – 10.5
P (G31) 10.0 – 12.0
5. Set the lower heating output (20 %)
and check the CO2 content.
The CO2 content must be between
0.3 and 0.9 % below the value of
the upper heating output (100 %).
6. ■ If the CO2 content is within the
range indicated, continue with
step 6.
■ If the CO2 content lies outside
the given range, check the bal-
anced flue system for tightness.
Remedy any leaks.
Replace gas train if required.
7. Re-check the CO2 content for the
higher and lower heating output.
8. Use / to set the burner output to
"OFF".
9. Press MODE, "SERV" is no longer
shown.
Note
The function also terminates auto-
matically after 30 min.
Checking the CO2 content (cont.)
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1. Shut down the boiler, remove the
flue gas analyser and close flue
gas test port A.
2. Select the appropriate label from
the "Gas type" labels supplied and
affix it next to the type plate on the
top of the boiler.
Note
The delivered condition shown on
the type plate then no longer
applies.
3. Mount the front panel and start the
boiler.
Starting the boiler
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Viessmann Limited
Hortonwood 30, Telford
Shropshire, TF1 7YP, GB
Telephone: [phone]
Fax: [phone]
E-mail: [email protected]
Viessmann Werke GmbH & Co. KG
D-35107 Allendorf
Telephone: [phone]
Fax: [phone]
www.viessmann.com
5685058 Subject to technical modifications.