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5 Installation
▶
If, during gas leak-tightness tests, you
also place the gas lines and the gas valve
in the product under pressure, use a max.
test pressure of 11 kPa (110 mbar).
▶
If you cannot limit the test pressure to
11 kPa (110 mbar), close any gas isolator
cocks that are installed upstream from the
product before you carry out the gas leak-
tightness test.
▶
If, during gas leak-tightness tests, you
have closed the gas isolator cock that is
installed upstream of the product, relieve
the gas line pressure before you open this
gas isolator cock.
Caution.
Risk of material damage caused by corro-
sion
Due to non-diffusion-tight plastic pipes in the
heating installation, air gets into the heating
water. Air in the heating water causes corro-
sion in the heat generator circuit and in the
product.
▶
If you use non-diffusion-tight plastic pipes
in the heating installation, ensure that no
air gets into the heat generator circuit.
Caution.
Risk of material damage due to heat trans-
fer during soldering.
▶
Only solder connectors if the connectors
are not yet screwed to the service valves.
If you also want to install an external heating pump without
a low loss header, install the external pump in the return and
connect it via the auxiliary relay.
5.1
Installation requirements
5.1.1
Information on liquefied petroleum gas
operation
In the as-delivered 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 natural
gas, you must replace the gas family coding resistor with the
enclosed coding resistor for liquefied petroleum gas during
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.
If you have selected the "liquid gas" gas type, after the start-
up process is complete, affix the enclosed "Liquid gas" con-
version sticker onto the data plate and affix the enclosed
tank sticker (propane quality) so that it is clearly visible on
10
the tank or the cylinder cabinet, if possible close to the filler
nozzle.
5.1.2
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.
5.1.3
Using the correct type of gas
Using the incorrect type of gas may cause fault shutdowns in
the product. Ignition and combustion noise may occur in the
product.
▶
Only use the gas type listed on the data plate.
5.1.4
Information and specifications for installing
the B23P
Pipe lengths in the B23P installation (→ Page 30)
The flue gas system must at least correspond to the classi-
fication T 120 P1 W 1 in accordance with EN 1443.
The maximum pipe length (straight pipe only) corresponds to
the maximum permitted flue gas pipe length without any el-
bows. If elbows are used, the maximum pipe length must be
reduced in accordance with the dynamic flow characteristics
of the elbows. Elbows must not be connected directly after
one another as this method dramatically increases pressure
losses.
In particular, if the flue pipe is installed in cold rooms or out-
side of the building, the freezing point on the surface of the
inside of the pipe may be reached. A proven design in ac-
cordance with EN 13384-1 for a maximum boiler load at a
flue gas temperature of 40 °C must be used to prevent this
problem. The product must not be connected to a cascade
flue gas system that is being used by other units.
▶
Observe the applicable international, national and local
regulations for flue gas systems, in particular for installa-
tions in living rooms. Inform the operator how to correctly
operate the product.
5.1.5
Required preliminary work
1.
Install a stop cock in the gas line.
2.
Make sure that the existing gas meter is capable of
passing the rate of gas supply required.
3.
Check that the volumetric capacity of the expansion
vessel is sufficient for the system volume.
Conditions: 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.
Conditions: External expansion vessel installed
▶
Install a non-return valve in the product outlet (heating
flow) or decommission the internal expansion vessel
in order to prevent the warm start function from being
increasingly activated due to backflow.
4.
Install a tundish with siphon for the condensate dis-
charge and the exhaust pipe on the expansion relief
valve. Lay as short a drain line as possible, at a down-
ward gradient away from the tundish.
Installation and maintenance instructions ecoTEC exclusive 0020189875_01
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