Immergas BASIC MAGIS PRO Instructions And Warnings page 79

1.25 MIXING VALVE.
The Basic Magis Pro hydronic unit is equipped
with a mixing valve that regulates the storage
tank unit outlet temperature.
Changing the mixing valve adjustment, changes
the operation mode of the system.
Setting of the above-described mixing valve
allows to obtain a hot water temperature value
at withdrawal between the maximum set on the
mixer and the minimum set on the remote panel.
Mixing valve adjustment field
(indicative values)
1
~42 °C
2 ~48 °c
~54 °C (default value)
3
4 ~60 °C
If the mixing valve is adjusted to a lower tem-
perature than the storage tank unit, it is possible
that the hot water temperature required for
withdrawal is not obtained.
1.26 COMMISSIONING (IGNITION).
One must comply with the following require-
ments to commission the product (the operations
listed below must only be performed by qualified
personnel and in the presence of staff only):
- make sure the safety devices are included and
are operating properly, particularly:
- domestic hot water safety valve (8 bar)
- system safety valve (3 bar)
- expansion vessel
- thermostatic mixing valve
- check that there are no leaks in the hydraulic
circuit;
- check connection to a 230V-50Hz power mains,
correct L-N polarity and the earthing connection;
- switch the system on and ensure correct igni-
tion;
- check the intervention of the main switch
located upstream from the system;
- check that all the requirements relating to
the hydraulic unit, the indoor and outdoor
units and the central heating circuit have been
complied with, as described in the relative
instruction booklet.
Even if just one single safety check provides a
negative result, do not commission the system.
System safety valve.
The indoor unit (and the outdoor unit of the
Victrix Hybrid Plus) has a safety valve that
protects the system from an excessive pressure
increase. This valve intervenes by discharging the
liquid contained in the circuit when the pressure
reaches 3 bar.
If the safety valve intervenes and therefore part of
the liquid contained in the circuit is lost, it must
be re-integrated.
N.B.: the Immergas Authorised After-sales Centre
can carry out the initial system check (point 2.1)
required to activate the warranty of Immergas
solely upon completion of commissioning by an
installer. The warranty and test certificate is issued
to the user.
1.27 GAS SYSTEM START-UP.
Start-up the system by referring to the relative
instruction booklet of the installed indoor unit.
1.28 COMMISSIONING SOLAR
HEATING SYSTEM COUPLING KIT
(OPTIONAL).
Preliminary checks on the solar system.
Before filling the hydraulic circuit and starting
the system, carry out the following checks:
- make sure the safety devices are included and
are operating properly, particularly:
- safety valve (6 bar)
- expansion vessel
- thermostatic mixing valve
(present in the Basic Magis Pro)
- check that there are no leaks in the hydraulic
circuit;
- make sure the air vent valve is positioned in the
highest point of the circuit above the manifold
and that it is operational.
- check that the product is connected to a
230V-50Hz power mains, that L-N polarity is
observed and that there is an earthing connec-
tion;
- check that all the requirements relating to the
product and the central heating circuit have
been complied with, as described in the relative
instruction booklet.
Even if just one single safety check provides a
negative result, do not commission the system.
79
Expansion vessel factory-set pressure of the
solar circuit hydraulic unit.
To compensate the high temperatures that can be
reached by the liquid in the circuit and therefore
cause Basic Magis Pro to dilate, an expansion
vessel has been set up on the hydronic kit with a
suitable capacity to perform this task.
The expansion vessels are supplied pre-loaded
at 2.5 bar. It is therefore necessary to deflate
them and reload them at the pressure required
for the circuit.
The expansion vessel must be charged to:
1.5 bar + 0.1 bar for every metre of the water
column.
"metre of the water column" means the vertical
distance that is present between the expansion
vessel and the solar collector.
Example:
The circulation unit is found on the ground floor
and the solar collector is found on the roof at a
hypothetical height of 6 m, the distance to be
calculated is:
6 m x 0.1 bar = 0.6 bar
therefore, the expansion vessel must be charged
to:
1.5 + 0.6 = 2.1 bar
Solar hydraulic unit safety valve.
There is a safety valve present on the hydraulic
unit that protects the system from an excessive
increase in pressure. This valve intervenes by
discharging the liquid contained in the circuit
when the pressure reaches 6 bar.
If the safety valve intervenes and therefore part of
the liquid contained in the circuit is lost, it must
be re-integrated.