Alfa Laval AquaMicro, Installation And Service Instruction

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Alfa Laval Micro
Installation and service instruction
53
C. Disturbing noise from the circulation pump/ Noise in the radiator system
Reason Action
C1)
Pump capacity 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.
C2)
Air in the pump Vent the pump
The pump is self-venting.
Air in the pump may cause noise. This noise ceases after a few minutes
run time.
Quick venting of the pump can be obtained by setting the pump to speed
III for a short period, depending on system size and design. When the
pump has been vented, i.e. when the noise has ceased, set the pump
according to the recommendations.
C3)
Pump motor or pump component
damaged Change pump components or the complete pump
If it becomes necessary to change the driving side of the pump, it can be
dismantled without removing the whole pump.
See chapter
15.5 Change the pump .
C4)
Differential pressure control valve
set too high Check the settings for the differential pressure control valve
See chapter 11 Differential pressure control valve, DPC , for information
how to set the valve.
D. Heating temperature unstable
Reason Action
D1)
Heating supply temperature
sensor and outdoor temperature
sensor (option) does not work Check the heating supply temperature sensor and outdoor
temperature sensor (option)
Check that they are correctly cited and working. To confirm that sensors
are connected and operating, press the info button on the room
thermostat, check that the specified temperatures are reasonable.
RTC service instructions 14.3
A. Heating system temperature too high or too low
Reason Action
A1)
The heating control equipment
may need to be adjusted Check and adjust the heating program in the room thermostat.
See Operating Instruction AL Micro section Modifying the heating
program in the room thermostat CM721 .
Check that the relay is on
See 6.3 Temporary manual override.
A2)
Heating valve and/or actuator
does not work Check the actuator and valve
function
Check the actuator by pulling out
the electrical cable and refit it
again; this will start an automatic
self-test for the actuator. Check
the flow using the energy meter
while test-running the valve.
If no energy meter is available,
disconnect the heating actuator
from the valve. Carefully depress
the valve’s spindle with a tool and
check the valve’s travel and spring
back.
Note: The valve may be very hot
Picture 47