Alfa Laval AquaMicro, Installation And Service Instruction

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Alfa Laval Micro
Installation and service instruction
51
D. Heating system temperature too high or too low
Reason Action
D1)
Filter for heating media clogged Check if the filter for heating media is blocked
See A3 .
D2)
Differential pressure control valve
incorrectly adjusted (option) Check the settings for the differential pressure control valve
See 11 Differential pressure control valve, DPC , for information how to
set the valve.
E. No heating
Reason Action
E1)
Closed radiator or floor heating
valves Check that all radiator valves and floor heating valves are fully open
E3)
Filter for heating media clogged Check if the filter for heating media is blocked
See A3.
E4)
Differential pressure control valve
incorrectly adjusted(option) Check the settings for the differential pressure control valve
See 11 Differential pressure control valve, DPC , for information how to
set the valve
F. Heating temperature unstable
Reason Action
G1)
Alternating pressure on primary
side Check available differential pressure and temperature at the
primary heating medium provider
G2)
Filter for heating media clogged Check that the filter for heating media is not blocked
See A3 .
G4)
Differential pressure control valve
incorrectly adjusted (option) Check the settings for the differential pressure control valve
See chapter 11 Differential pressure control valve, DPC , for information
how to set the valve
STC service instructions 14.2
Hand manoeuvre of the heating actuator
The room thermostat must be without current when manoeuvring the actuator by hand.
NOTE: if manually adjusting the actuator, the operator control panel must be restarted before use.
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 curve
See 8.2 CM737-Installer parameters table , and change the selected
heating curve with parameter 15 category 1.
If needed the set heating curve can be fine-tuned. Increase/ decrease the
room temperature to parallel adjust the heating curve.
Also see in the manual
Operating Instruction AL Micro section OTC
heating curve and Parallel adjustment of heating curve .