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4. Installation
4.12 Filling the heating system
Refer to Section 4.6 (water connections for water
treatment information)
4.12.1 Water treatment
Refer to section 4.6 water connection for water
treatment information
4.12.2. Filling the siphon
1. Remove the siphon.
2. Fill the siphon with tap water. This must be
completely filled.
3. Re-assemble the siphon.
CAUTION
Fill the water siphon before starting the boiler to
avoid combustion products escaping from the boiler.
CAUTION
During operation, check condensation siphon is
draining properly.
4.12.3. Filling the heating system
CAUTION
Before filling, open the valves on every heating circuit
in the installation.
i
In order to be able to read off the water
pressure from the boiler display, the boiler
must be switched on.
1. Fill the system with clean tap water (advised water
pressure is between 22 - 30 psig/1.5 - 2 bar ).
2. Check the tightness of the water connections.
i
After switching on the power and if there is
adequate water pressure, the boiler always
runs through an automatic venting program
lasting approximately 3 minutes (During
filling, air can escape from the system via the
automatic air vent). If the water pressure is
lower than 11.6 psig/0.8 bar , the symbol
will appear. If necessary, top up the water level
in the heating system (recommended system
pressure between 22 - 30 psig/1.5 - 2 mbar ).
64
CAUTION
•
The filling must be carried out within 30 minutes,
otherwise the venting program starts and that
would be undesirable if the device is not filled.
Switch off the boiler if the heating system is not
being topped up immediately.
•
When venting air from the system piping, prevent
water from getting into the boiler casing and
electrical parts of the boiler.
MCA Pro 45/65/90/115
MCA-Pro ISM Rv.4.1 2/2017
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