4.12 Filling The System; Water Treatment; Filling The Siphon - REMEHA Calenta 25s Installation And Service Manual

Calenta 25s - 28c - 35s - 40c

4.12 Filling the system

040412 - 7600585-01
4.12.1.
In most cases, the boiler and the central heating installation can be
filled with normal tap water and no water treatment will be necessary.
4.12.2.
1. Remove the siphon.
2. Fill the siphon with water. This must be filled up to the level
3. Re-assemble the siphon.
T001523-B

Water treatment

WARNING
Do not add chemical products to the central heating water
without consulting Remeha. For example: antifreeze,
water softeners, products to increase or reduce the pH
value, chemical additives and/or inhibitors. These may
cause faults in the boiler and damage the heat exchanger.
Rinse the central heating installation with at least 3x
4
the volume of the central heating installation. Flush
the DHW pipes with at least 20 times the volume of
the pipes.
For untreated water, the pH value of the water in the
4
installation must be between 7 and 9 and for treated
water between 7 and 8,5.
The maximum hardness of the water in the installation
4
must be between 0,5 - 20,0 °dH (Depending on the
total installed heat output).
For more information, refer to our publication water
4
quality rules. The rules in the aforementioned
document must be respected.

Filling the siphon

markers.
CAUTION
Fill the water siphon before starting the boiler to avoid
4
combustion products escaping from the boiler.
Mount the vent hose above the siphon.
4
4. Installation
51