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Värmebaronen MP4 G2 / MP6 G2
Venting - Vent valve
Air may remain in the system for a while after installation, for
which reason water needs to be added.
When the system is full of water, it must be vented with the vent
valve on the boiler and the bleeder valves on the heating system.
The vent valve protective cover must be loosened by 1.5
turns so that the air can escape.
In order for the vent valve to function satisfactorily, the sys-
tem pressure should not be less than 1.5 bar.
The vent valve is checked regularly. If the valve does not
close due to contaminants, liquid comes up through the air
outlet. Growing deposits around the air outlet indicate that
this fault has occurred. Clean or replace the air vent.
Draining
The boiler must be switched off before the water is drained
from the system.
Always switch off the boiler before:
• the boiler water is drained
• doing anything to the automatic control
cabinet or the boiler’s power units
Frost protection - heating systems
If the heating system's water is mixed with anti-freeze, it
is important to check that it contains a suitable quantity of
corrosion-protection additive. When an anti-freeze disinte-
grates, one of the by-products can be carbonic acid, which
increases the risk of corrosion.
Frost protection - function
If the boiler temperature goes below 3°C, the circulation
pump and the power will be switched off in order to avoid the
boiler operating in a frozen system.
If the system's water contains anti-freeze and a low tem-
perature is desired in the system, the frost protection can
be disabled. See menu - "Advanced Service Level" row 22.
However, the boiler will try to maintain a temperature of 10°C.
Action in the event of a risk of freezing
When it is extremely cold, no part of the heating system must
be switched off as there is a risk of bursting.
If you suspect that any part of the heating system is frozen,
contact an installation engineer.
If the heating system is to be switched off for an extended
period of time, the system should be drained or it can be
filled with water mixed with anti-freeze.
Operation and maintenance
The boiler must not be in operation if you suspect
that any part of the heating system is frozen.
Call an installation engineer!
Circulation pump
With the UTK function activated, the pump is in operation
for as long as the outside temperature is lower than the set
pump stop value, see menu "User level" row 7.
If the UTK function has not been selected, the pump will
operate continuously.
ECO - function
If, for a certain period, no heat is desired from the boiler, the
ECO function can be activated.
See menu "User level" row 8.
This means that no power is connected and that the circula-
tion pump is not running: In order for the pump not to get
stuck, it is run for a few minutes every two days.
If the boiler temperature is lower than 10°C, the frost protec-
tion is activated, the pump starts and the power is switched
on to avoid freezing.
Over temperature protection
The upper temperature protection supplements the overheat-
ing protection. The aim is to prevent the overheating protec-
tion from triggering as far as possible.
The break temperature of the upper temperature protection
can be set as a fixed temperature or a temperature relative to
the set point.
See “Advanced Service level” rows 20 and 21.
Optional Room Unit
The boiler can be fitted with a room unit with a setting for
the desired room temperature and an alarm indication, with
the same function as the red indication on the front panel of
the boiler.
The room unit increases the heating comfort with the low-
est possible energy consumption. Additional information is
included with the device.
Room unit, see “User level” rows 5 and 6 and “Service level”
row 17.
