Alfa Laval Micro Instructions D'installation, D'entretien Et D'utilisation page 56

Alfa Laval Micro
Installation, service and operating instruction
19 Service instructions
Always start with the general service instruction before the specific instructions for each model.
To avoid the risk of scalding, make sure that no-one draws any water while servicing the
substation.
Grey marked service actions must be carried out by an authorized service technician.
NOTE! Make sure that the substation has been correctly installed.
19.1 General service instructions
Symptom Reason
Tap water Primary heating supply too low
temperature too
low
Handle on control valve incorrectly
positioned
Filter for heating media clogged
Hot water valve does not work
Tap water Handle on control valve incorrectly
temperature too positioned
high
Hot water valve and/or actuator
does not work
Hot water Alternating pressure on primary
temperature
side
unstable or too low
Filter for heating media clogged
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54
Action
Check the primary inlet temperature
The temperature can be checked by means of the
energy meter
(min 65º C) or contact the primary heating medium
provider.
See 19.5.1 Adjust the handle on the control
See 19.5.2 Check if the filter for heating media is
blocked.
See 19.5.3 Check the function of the valve for hot
water
See 19.5.1 Adjust the handle on the control valve.
Check the valve according to
function of the valve for hot water
If the water temperature is too high when the
handle is in position 0, the actuator or the
exchanger is damaged and requires replacing.
Check available differential pressure and
temperature at the primary heating medium
provider
See 19.5.2 Check if the filter for heating media is
blocked.
valve.
19.5.3 Check the