3
x
Set-up and Installation
20
FA ROTEX A1 BO - 10/2007
3.6
Water connection
The oil condensing boiler has a joint flow and return flow for the heating circuit and charging the storage tank. The connections
are on the back of the units (see fig 3-2 and fig 3-3).
Instructions for water connection
–
Water shortage protection
: The overheating guard of the oil condensing boiler series A1 BO shuts off the oil condensing
boiler in the event of a water shortage and locks it for safety reasons. No additional water shortage protection is needed in
the construction.
Notes on water quality
–
Avoiding deposits:
Observe the regulations in VDI 2035 in order to avoid corrosive products and deposits. If filling and
additional water has a high degree of hardness (Sum of alkaline earths > 3 mol/m
3
), measures need to be taken to stabilise
or soften hardness.
– Install dirt filter in the heating return flow
(up to 28 kW the
SFR 28
,
15 60 11
; up to 50 kW the
SFR 50
,
15 60 12
).
3.7
Connecting the condensate treatment unit
The condensation in oil condensing technology has a pH value between 1.8 and 3.7.
• Neutralise the condensation in accordance with the local guidelines and discharge into the public drainage system.
Connection
The condensate treatment unit is factory-assembled in the boiler cradle and connected to the flue gas connecting piece of the
boiler. The connection to the wastewater network is designed for
HT piping DN 40
.
• Lay the condensate drain sloping down from the boiler so that condensation will not accumulate in the flue gas manifold.
• In order to avoid accumulation in the flue gas connection of the boiler, make sure that no siphon is formed between the
condensate drainage hose and the connection with the wastewater line.
• Fill the condensate pipe with water in order to prevent flue gas from escaping into the installation room. To do this, either :
– Open the boiler body and lift up the combustion chamber insert (see section 8.2.5); top up condensate pipe through a
hose (see fig 3-8) or,
– Unscrew the inspection lid of the flue gas pipe and fill the condensate pipe by using a hose held in the flue gas manifold.
• Check the condensate drain section for leakage.
CAUTION!
If the oil condensing boiler is connected to a heating system with steel pipelines, radiators or non-diffusion-
proof floor heating pipes, slurry and chips could enter the boiler and cause blockages, overheating or corrosion.
• Rinse out the heat distribution network (in the existing heating system).
• Install a dirt filter in the heating return flow.
Depending on the regulations of the community waste water regulations, neutralisation can be dispensed with,
if the condensing boiler is operated
exclusively
with
low-sulphur
heating oil EL
.
Fig. 3-7
Connection of the condensate treatment unit
Fig. 3-8
Fill condensate treatment unit with water
