Sime UNIQA REVOLUTION - Maintenance Checks and Pressure Readings; Smoke Duct and Expansion Vessel Checks; Nozzle Pressure Reading via Chimney Sweep

45
8.4 Checks
8.4.1 Checking the smoke duct
It is recommended that the user checks that the combustion air
inlet duct and smoke outlet duct are integral and airtight.
8.4.2 Checking the expansion vessel pressure
It is recommended that the expansion vessel on the water side
is drained and that the prefilling pressure is not less than
1 bar .
If this is not the case, pressurize it to the correct value (see
sectionExpansion vessel".
Once the checks described above have been completed:
– refill the boiler as described in section "REFILL operations"
– start the boiler up and carry out a smoke analysis and/or
measure the combustion efficiency.
– refit the front panel securing it with the two screws which
were removed previously
8.5 Reading the pressure at the nozzles with
the chimney sweep function
Should the pressure at the nozzle need to be checked, a
qualified maintenance technician can activate the chimney
sweep function described below.
This function lasts 15 minutes and is activated by proceeding
as follows:
– if the panel (2) has not already been removed, remove the
two screws (1), pull the front panel (2) forwards and release it
from the top by lifting it
1
2
Fig. 59
– remove the screws (3) securing the control panel (4)
– move the panel (4) upwards (a) but keeping it in the side
guides (5) to the end of travel
– bring it forwards and down (b) until it is horizontal
3
a
b
5
4
Fig. 60
– close the gas valve
– loosen the "nozzle pressure" point (6) and the screw of the
"supply pressure" point (7) and connect each one to a pressure
gauge
6
7
Fig. 61
m
CAUTION
There must be no heat requests in progress (hot water
valves closed or TA open/not activated).
– open the gas valve
– power the boiler by setting the main switch to "ON"
ON
Fig. 62
– press button
y
and hold for at least 1 second, until you
select “SUMMER” mode
l
, where it is not already selected
– press and hold down the buttons
<
and
>
at the same time
for approximately 10 seconds until the message “Hi” appears
on the display together with the flashing symbols
l
and
n