Cetetherm Mini Plus CM737, Installation, Service And Operating Instruction

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Cetetherm Mini Plus CM737
Installation, service and operating instruction
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15.1.4 Noise in the DHWC system
Reason Action
The pump capacity is set too high Reduce the pump capacity
The pump has been set at a too high capacity level. Reduce the
level by choosing a lower output setting on the pump.
The lowest setting is the most economical.
Air in the pump Vent the pump
Set the pump to speed III. Loosen the pump motor end nut to and
let it stay opened until the air in the pump is released. When the
pump has been vented, i.e. when the noise has ceased, set the
pump according to the recommendations.
The pump motor or pump component
damaged See 17.3 Change the complete DHWC pump or pump
components .
15.2 Heating system service instructions
15.2.1 Heating system temperature too high or too low
Reason Action
The pressure in the system is to low or
there is not enough water in the heating
system Check the pressure on the manometer and top up the system
with water
The pressure should not be below 1.0 Bar in winter time or below
0.6 Bar in summer. The circuit should only be topped up with fresh
water when necessary. The water used for topping up contains
oxygen which can lead to corrosion in the system. The circuit
should therefore be topped up as seldom as possible. Fill up by
opening the top up valves until the pressure meter shows desired
value, or up to maximum 2.0 Bar.
Then close the top up valve.
The safety valve opening pressure is 2.5 Bar.
Air in the heating system Bleed the heating system
Bleed the heating system at highest point in the heating system.
The pump is self-venting. Air in the pump may cause noise. This
noise ceases after a few minutes run time.
Bleed the radiators.
Picture 17
Heating supply temperature sensor and
outdoor temperature sensor does not
work Check the heating supply temperature sensor and outdoor
temperature sensor
Check that they are correctly sited and working. To confirm that
sensors are connected and operating, press the info button on the
operator control panel, check that the specified temperatures are
reasonable.
Heating circuit filter clogged See 17.2 Cleaning the heating circuit filter.