Commissioning; Water And Hydraulic System - Rendamax R3 EVO Serie Manual De Uso E Instalación

Commissioning

Water and hydraulic system

Commissioning of the boiler should be
carried out by authorized personnel
only. Failure to respect this condition
makes the guarantee void. A protocol of
the commissioning should be filled out
(see end of this chapter for example of
commissioning protocol).
This chapter explains the commissioning
of the boiler with the standard boiler
controller. When an additional system
controller is installed, please refer to its
manual for commissioning the controller.
Water pressure
Open the valves to the system. Check
the water pressure in the system. If the
water pressure is too low (see table
below), increase the pressure up to
at least the minimum required water
pressure in the table.
Filling can be done via the fill and drain
valve on the return connection (1) of the
boiler.
Hydraulic system
Check if the boiler is hydraulically
connected to the system in such way,
that water flow can be secured at all
times during burner operation. The
water flow is supervised by the water
flow switch in the boiler and a lack of
flow will lead to a direct burner stop and
lockout of the boiler.
1
32
Water quality
(refer to tab. 1 and 2)
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 refilling water for
the R3XXX EVO according to the the
VDI2035.
Tab. 1
Working temperature
Minimum operating water pressure
pH water
Water hardness
Electrical conductivity
Oxygen content
Chlorides content
Sulphides content
Nitrides content
Iron content
TOTAL HEATING
OUTPUT
[kW]
50kW - ≤ 200kW
(2.0 mol/m
200kW - ≤ 600kW
(1.5 mol/m
600kW - ≤ 1200kW
(1.0 mol/m
2
> 1200kW
(0.5 mol/m
Use water softening in case maximum values are exeeded (mandatory for warranty!)
The table 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.
System water
10 - 90°C
1,5 bar
8,2 - 10,0
"Actual table from
VDI2035
(see sheet ""CH hard-
ness"")"
<100μS/cm
<0,05mg/l
<50 mg/l
<50 mg/l
<50 mg/l
<0,2mg/l
Tab. 2
Accepted hardness related to specific volume of installation
SPECIFIC VOLUME
< 20 l/kW ≥ 20 l/kW - < 50 l/kW
≤ 11.2°dH ≤ 8.4°dH
≤ 19,9 °f ≤ 15,0 °f
) (1.5 mol/m
3
≤ 8.4°dH ≤ 5.6°dH
≤ 15,0 °f ≤ 10,0 °f
) (1.0 mol/m
3
≤ 5.6°dH ≤ 2.8°dH
≤ 10,0 °f ≤ 5,0 °f
) (0.5 mol/m
3
≤ 2.8°dH ≤ 0.11°dH
≤ 5,0°f ≤ 0,20 °f
) (0.02 mol/m
3
Central Heating
Filling water
10 - 25°C
-
7,0 - 9,5
"Actual table from
VDI2035
(see sheet ""CH hard-
ness"")"
<100μS/cm
<0,05mg/l
<50 mg/l
<50 mg/l
<50 mg/l
<0,2mg/l
≥ 50 l/kW
≤ 5.6°dH
≤ 10,0 °f
) (1.0 mol/m )
3 3
≤ 2.8°dH
≤ 5,0 °f
) (0.5 mol/m )
3 3
≤ 0.11°dH
≤ 0,20 °f
) (0.02 mol/m )
3 3
≤ 0.11°dH
≤ 0,20 °f
) (0.02 mol/m )
3 3