P2_PANTHER_user manual_ work basis_EN_03 - 07/11 - Protherm
- 13 -
HOW TO USE THE BOILER
8.7 Operating pressure in the heating
circuit
The heating system (measured at the
boiler) must be
fi
lled to a hydraulic
pressure of at least 1 bar (corresponding
to a hydrostatic height of water of 10 m.)
The recommended pressure range is
between 1 - 2 bar.
8.8 Admitting water into the heating
circuit
Bringing water into the heating system
(small quantities only) can be done via the
inlet valve on the boiler.
When
fi
lling the boiler the following
conditions must be observed:
- The water pressure on entry into the
boiler must always be higher than the
water pressure in the CH circuit.
- Water is drawn into the boiler strictly
in a cold state (CH temperature in the
boiler up to 30°C).
- The recommended water pressure in
the cold boiler (up to 30°C) is between
1 – 2 bar.
- The pressure in the expansion tank
is checked and if necessary adjusted
to the correct value (see technical
parameters on end of this manual).
8.9 Discharging water from the boiler
The outlet valve is designated primarily for
lowering the water pressure in the boiler
during repairs. Only a partial discharge of
water from the boiler is possible through
this outlet.
A complete draining of water from only
the boiler or the heating circuit and repeat
fi
lling must be carried out at inlet/outlet
valves at appropriate locations in the
heating circuit.
Discharging and
fi
lling of water into
the heating circuit and the subsequent
operations (air venting, regulating the
expansion tank) are not covered by the
boiler warranty.
If the HW in the boiler and piping is
threatened with freezing, appropriate
measures must be taken to avoid this
entirely.
Note:
The release valve is located on the
right side of the boiler at the pump.
8.10 Expansion vessel
Before
fi
lling the CH system, check the
pressure in the expansion chamber. The
initial pressure in the expansion chamber
should be greater by 0.2 bar than the
static height of the water column of the
heating circuit.
Water may then be released into the CH
system. Filling water pressure should be
0,2 – 0,3 bar higher than the pressure in
the expansion chamber. Filling pressure is
controlled from the cold state by the gauge
on the water side after bleeding.
The valve for topping up the pressure in
the expansion chamber is on the right
side.
Caution:
Con
fi
rm that the expansion
chamber is suf
fi
cient for the given quantity