Viessmann Vitovalor PA2 User manual

5838219 GB 2/2019 Dispose after installation.
Installation instructions
for contractors
VIESMANN
Replacing the distilled water cartridge, air filter, air
filter B and CO sensor (5-yearly service pack)
for Vitovalor PT2 and PA2
Safety instructions
Please follow these safety instructions closely to prevent accidents
and material 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"
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.

2
Switching the fuel cell module to maintenance mode and drain-
ing the distilled water
1. Switch the fuel cell module to main-
tenance mode.
Installation and service
instructions
2. Drain off the distilled water.
Installation and service
instructions
3. Isolate the system from the power
supply and remove the front panels.
Installation and service
instructions
4. Open the fuel cell module: See fol-
lowing chapters.
Note
■ If performing the 5-year maintenance,
all the components in the mainte-
nance package are replaced.
■ With the 10-yearly service, the flam-
mable gases sensor must additionally
be replaced: See separate installa-
tion instructions.
Removing the front panels
Installation and service instruc-
tions
Opening the fuel cell module
!Please note
Take care to avoid injury from
sharp edges.
Wear personal protective equip-
ment (safety gloves).
Preparing for installation
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3.
1.
2.
4x
4x
Note
Open the two lower locks first.
Preparing for installation (cont.)
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4
1.
2.
2.
3.
Note
Residual water may escape during dis-
mantling. Collect any residual water
using suitable resources.
■ Install the new components in
reverse order.
■ Fit new O-rings to all water connec-
tions that have been opened.
Replacing the distilled water cartridge
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1.
4.
3.
2.
Replacing the air filter
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■ Install the new components in
reverse order.
■ Fit new O-rings to all connections
that have been opened.
Replacing the air filter (cont.)
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2.
1.
■ Install the new components in
reverse order.
■ Fit new O-rings to all connections
that have been opened.
Replacing air filter B
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Install the new components in reverse
order. Fit a new gasket to the CO sen-
sor.
Torque for screws: 1.0 +/-0.1 Nm
Replacing the CO sensor
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Only do this when all the components
in the service pack have been replaced.
Note
Distilled water is available to order.
1. With every 5-yearly service: Reset
the service indicator of the fuel cell
module.
Note
The service indicator can only be
reset when there is a service pend-
ing.
Installation and service
instructions
2. Fill with new distilled water. For the
steps involved, see:
Installation and service
instructions
3. Fit the front panel of the fuel cell
module: See page 3.
Secure the locks with screws.
4. Fit the front panels.
Installation and service
instructions
5. Start the system.
Installation and service
instructions
Filling with new distilled water and starting the system
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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
5838219 Subject to technical modifications.