AOSmith MVI 103 Notice D'installation Et D'utilisation page 64

4.2.2
4.2.3
4.2.4
64
MVI pompstation / MVI pump station / station de pompage MVI
Settings Resol Control
To make the high capacity pump station function in combination with the Resol control some
settings need to be made. Based on the wishes of the end user, several settings can be
made. These settings and the available ranges can be found in the instruction manual of the
Resol control, supplied with the part.
One setting that must be changed is the modulation of the pump. The high capacity pump
present in this solar pump station can not modulate and must be set accordingly. To set this
right in the Resol control, change the setting Pump speed control n1MN to 100% (factory
setting 30%). By not changing this setting, the relay in the CB-box will be destroyed within a
short period of time.
Settings SHM Control
To make the high capacity pump station function in combination with the SHM control and
the water heater some settings need to be made. Based on the wishes of the end user,
several settings can be made. These settings and the available ranges can be found in the
instruction manual of the water heater, supplied with the unit.
Pre-charge the expansion vessel
Note:
The expansion vessel comes pre-charged: damage may result in serious
injuries.
Note:
Prevent overpressure in the installation. A 6 bar safety valve is part of the
high capacity pump station to prevent this. The opening pressure of the
safety value should be equal to or lower than the maximum working
pressure shown on the label. The connection between the expansion vessel
and the solar collector field must always be open.
1. Determine the pre-charge value of the expansion vessel. This value depends on the
type of system and is stated in appendix 9.4.
2. Set the pressure of expansion vessel to the predetermined value with the following
procedure:
a. Remove the protective cap (G) and valve cap (H).
b. Measure the pressure.
c. If the pressure is too high, allow gas to discharge through the gas valve; if the
pressure is too low, fill with expansion gas. Nitrogen must be used as filling gas.
d. Replace valve cap (H) and protective cap (G).
3. The expansion vessel is now ready for use.