Rendamax R3456 EVO, Руководство пользователя, Страница: 22 / 72

Norms and regulations
Maintenance
Fuel
Combustion air
Water quality
Maintenance
Regular maintenance is necessary to
secure a safe and economical
operation of the installation. For the
R3456 EVO, one annual maintenance
visit is recommended. During this visit,
the proper functioning of the complete
heating system should be checked as
well.
Water quality
The lifetime of the complete heating
system is affected by the water quality.
Additional costs for water treatment of
an installation are always lower than
repairing costs for damage created by
poor water quality.
Fuel
The gas condensing boiler R3456 EVO
is applicable for gases G20, G25, G30
and G31. Factory settings are always
done for G20. For other types of natural
gas, a correction can be made on the
gas valve. For LPG, it’s necessary to fit
a restriction plate (included in delivery)
before operating the boiler.
The R3456 EVO can work with gas
pressures up to 100 mbar. In case of a
gas pressure above 100 mbar, a
pressure regulator should be fitted in
the gas line (available as accessory).
The gas consumption and gas
pressures of the different gases can be
found in the chapter „Technical data“.
Combustion air
The gas condensing boiler R3456 EVO
can be used in both non-room sealed
and room sealed applications. The
combustion air to the boiler shouldn’t
contain high concentrations of dust
and/or halogen, as they can damage
the heat exchanger surface. Especially
in buildings, where chemicals are used,
the combustion air facility should
prevent these chemicals to enter the
boiler.
The different room sealed connection
possibilities the R3456 EVO is
approved for, can be found in the
chapter „Flue gas system“.
The following water quality levels must
be respected at all times for warranty
claiming. Damage to the boiler due to
poor water quality will not be taken
under warranty.
The system should be filled with water
with a PH value between 7,0 and 9,5.
The chloride -, sulphide - and nitride
value of the water should not exceed
50 mg/l. Entry of oxygene by diffusion
should be prevented at all times.
Damage to the heat exchanger
because of oxygene diffusion will not
be taken under warranty.
In installations with higher water
volumes, it’s necessary to respect the
maximum filling and additional volumes
with corresponding hardness values as
stated in the german VDI2035
standard. In the table you can find the
nominal values for filling and additional
water for the R3456 EVO according to
the VDI2035.
The table at the left gives an indication
of the relation between the water
quality and the maximum water filling
volume during the lifetime of the boiler.
Consult the original text of the VDI2035
for more detailed information.
Constant entry of oxygene in the
installation should be avoided. The
system water pressure should be
higher than the atmospheric pressure in
all parts of the installation. Underfloor
heating components without oxygen
diffusion barrier should never be used.
When they’re used anyway, a system
separation (e.g. with plate heat
exchanger) is compulsory.
21
TOTAL HEATING
OUTPUT [kW]
Accepted hardness related to specific volume of installation
SPECIFIC VOLUME
< 20 l/kW ≥ 20 l/kW - < 50 l/kW ≥ 50 l/kW
50kW - ≤ 200kW
≤ 11.2°dH ≤ 20°f ≤ 8.4°dH ≤ 15°f ≤ 5.6°dH ≤10°f
(2.0 mol/m
3
) (1.5 mol/m
3
) (1.0 mol/m
3
)
200kW - ≤ 600kW
≤ 8.4°dH ≤ 15°f ≤ 5.6°dH ≤10°f ≤ 2.8°dH ≤ 5°f
(1.5 mol/m
3
) (1.0 mol/m
3
) (0.5 mol/m
3
)
600kW - ≤
1200kW
≤ 5.6°dH ≤10°f ≤ 2.8°dH ≤ 5°f ≤ 0.11°dH ≤ 0.2°f
(1.0 mol/m
3
) (0.5 mol/m
3
) (0.02 mol/m
3
)
> 1200kW
≤ 2.8°dH ≤ 5°f ≤ 0.11°dH ≤ 0.2°f ≤ 0.11°dH ≤ 0.2°f
(0.5 mol/m
3
) (0.02 mol/m
3
) (0.02 mol/m
3
)
Concentrate Capacity of installation Q (kW)
Ca(HCO
3
)
2
600 800 1000 1200 1400 1600 1800 2000
mol/ m
3
dºH °f Maximum water (re)fill volume V
máx
[m
3
]
≤0.5 ≤2.8 ≤5 -
- -
75.1 87.6 100.2 122.7 125.2
1.0 5.6 10
- - -
37.6 43.8 50.1 56.3 62.6
1.5 8.4 15 12.0 16.7 20.9 25.0 29.2 33.4 37.6 41.7
2.0 11.2 20 9.4 12.5 15.7 18.5 21.9 25.0 28.2 31.3
2.5 14.0 25 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0
≥3.0 ≥16.8 ≥30 6.3 8.3 10.4 12.5 14.1 16.7 18.8 20.9