0020193966_04 ecoTEC exclusive Installation and maintenance instructions
17
7
Installation
7.1
Installation requirements
7.1.1
Information on liquefied petroleum gas
operation
In the as-supplied condition, the product is preset for opera-
tion with the gas group indicated on the data plate.
If you have a product that is preset for operation with nat-
ural gas, you must replace the gas family coding resistor with
the enclosed coding resistor for liquefied petroleum gas dur-
ing the installation. During start-up, the product must be con-
verted for operation with liquefied petroleum gas in the in-
stallation assistant. You do not require a conversion set, be-
cause the product has a gas-adaptive heat cell, which is set
independently to the relevant gas type within the gas family.
The gas type can also be changed at a later point using dia-
gnostics code
D.087
.
Furthermore, for operating with liquefied petroleum gas, the
differential pressure sensor must be replaced with a bypass
since, otherwise, this may lead to fault messages. The by-
pass is available as an accessory.
If you have selected the "liquefied petroleum gas" gas type,
after the start-up process is complete, affix the enclosed
"Liquefied petroleum gas" conversion sticker onto the data
plate and affix the enclosed tank sticker (propane quality) so
that it is clearly visible on the tank or the cylinder cabinet, if
possible close to the filler nozzle.
7.1.2
Purging the liquid gas tank
If the liquid gas tank is not purged properly, this may result in
ignition problems.
▶
Ensure that the liquid gas tank has been purged properly
before installing the product.
▶
If required, contact the filler or the liquid gas supplier.
7.1.3
Using the correct gas type
Using the incorrect gas type may cause fault shutdowns in
the product. Ignition and combustion noise may occur in the
product.
▶
Only use a gas type from the gas group that is defined on
the data plate.
▶
Check whether the gas type that is available at the in-
stallation site and the gas type that is set in the product
are the same.
▶
To do this, check the setting for diagnostics code
D.087
.
7.2
Preparing for installation
1.
Make sure that the existing gas meter is capable of
passing the rate of gas supply required.
2.
Consider the maximum heat output given in DHW
mode.
3.
Install a system separator (to be provided on-site) dir-
ectly on the cold water connection for the combi boiler.
4.
Install the following components:
–
Draining cocks at the lowest points in the heating
installation (
→
current version of "BS 2879")
–
A stopcock on the cold water connection
–
A stopcock in the gas pipe
5.
Check that the volumetric capacity of the expansion
vessel is sufficient for the system volume.
Condition
: The volume of the installed expansion vessel is insufficient
▶
Install an additional expansion vessel, connected as
close to the product as possible, in the heating return.
6.
Install the connection pipes such that they are free from
mechanical stress.
7.
If you use non-diffusion-tight plastic pipes in the heating
installation, ensure that no air gets into the heat gener-
ator circuit.
8.
Only solder connectors if the connectors are not yet
screwed to the service valves.
9.
Only bend connection pipes if they have not yet been
connected to the product.
10. Flush the heating installation thoroughly before
installing the product.
11. Check the leak-tightness of the gas valve assembly
using a pressure of
≤
11 kPa (110 mbar).
7.3
Installing the gas connection
1.
Install the gas line in accordance with the recognised
rules of technology.
2.
Connect the product to the gas line in accordance with
the recognised rules of technology.
3.
Remove the residues from the gas line by blowing
through the gas line beforehand.
4.
Purge the gas line before start-up.
7.4
Checking the gas line for leak-tightness
▶
Check the entire gas line properly for leak-tightness.
7.5
Installing the cylinder connections
1
▶
Connect the cylinder connections
(1)
to the domestic hot
water cylinder.
–
For this purpose, you can use an optional cylinder
connection set.
