Vailant ecoTEC plus 937, Installation And Maintenance Instructions Manual

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Installation and maintenance instructions ecoTEC plus 937 0020031552_06
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Jenaqua 110
Sentinel X 100
Sentinel X 200
Additives for frost protection intended to remain per-
manently in the system
Fernox Antifreeze Alphi 11
Sentinel X 500
Inform the operator of the necessary measures in
case you have used any of these additives.
Inform the operator of the required procedures for
frost protection.
Observe the applicable national regulations and tech-
nical standards for the treatment of filling and top-up
water.
Provided the national regulations and technical stand-
ards do not specify any higher requirements, the follow-
ing applies:
You must treat the heating water
if the total volume of filling and top-up water
exceeds thrice the nominal volume of the heating
system over the service life of the system
or
if the limits given in the following tables are not
adhered to.
Total heating
output Total hardness for the smallest boiler heating
surface
2)
at 20 l/kW
> 20 l/kW
< 50 l/kW
> 50 l/kW
kW mol/m 3 mol/m 3 mol/m 3

50
No requirement or

3
1)
2 0,02

50 to

200
2 1,5 0,02
 200 to  600 1,5 0,02 0,02
 600 0,02 0,02 0,02
1) with systems equipped with wall-hung boiler and systems with
electric heating elements
2) of the specific system volume (nominal capacity in litres/heat-
ing output; in case of multiple boiler systems the lowest indi-
vidual heating output should be used)
These data only apply up to 3x the system volume for filling
and top-up water. Once this triple system volume is exceeded,
the water will have to be treated exactly the same as in case
of exceeding the limit values given in table 4.4 (softening,
desalination, hardness stabilisation and desludging).
Table 4.3 Guidelines for the heating water: Water hardness
–
–
–
–
–
>
>
>
>
–
–
Heating water
qualities
Unit Low-salt saline
Electric conductivity
at 25 °C

S/cm

100
100-1500
Appearance Free of sedimentary substances
pH-value at 25 °C 8,2-10,0 1) 8,2-10,0 1)
Oxygen mg/L

0,1

0,02
1) With aluminium and aluminium alloys, the ph value range is
restricted from 6.5 to 8.5.
Table 4.4 Guidelines for heating water: Salinity
4.8.3 Pressure relief valve
The boiler is equipped with a pressure relief valve. This
safety device is required for all sealed central heating
systems, is preset to 3 bar and is fitted with a 15 mm
compression connection for the discharge pipe, whose
diameter must not be less than 15 mm. The pressure
relief valve must not be used for draining purposes.
4.8.4 Pressure gauge
The pressure gauge is fitted to the boiler in the factory
and indicates the pressure of the primary circuit, to
make filling and testing easier.
General requirements 4