26
System manager operating instructions
6.7 - CHECKS BEFORE COMMISSIONING
Before commissioning the appliance, the following should
be checked:
- Make sure the gas shut-off valve upstream the boiler is open.
- Make sure that any shut-off valves for maintenance on the
flow and return pipes are open.
- Check the connection of the safety valves to the sewer
system.
- Check the connection of the condensation drain siphon un
-
derneath the smoke chamber to the sewer system.
- Make sure the boilers are powered electrically; the indicator
light of the switch on the panel boards must be on.
- Check the water pressure on the system’s pressure gauge
(with pump stopped).
Should the pressure be lower than
1 bar with the system cold,
restore pressure by opening the system filling tap.
When the burner switches on and off, slight sounds could
be heard due to settling of the structure. Do not worry about
this as expansions are foreseen during design.
Complete deactivation
When the system is put completely out of service, hot water
production is fully deactivated.
To deactivate the system, disconnect power to the boilers by pla
-
cing the main switches at
0
: the “green” indicator lights will be off.
If idle for long periods, close the gas shut-off valve and cold
water cock, if pr
esent.
Heating system pressure
Check the pressure gauge regularly to verify water pressure
in the boiler.
When the pressure drops below 1 bar, it should be restored,
with the boiler cold
, until it reaches the static pressure
relative to the highest point of the system, by gradually
opening the filling cock outside the boiler.
Close the filling cock when the proper pressure has been
reached.
If water pressure must be continually
restored, contact an Authorised
Assistance Centre.
6.8 - ELIMINATING FAULTS
System pump runs but burner stopped
Meaning:
Boiler safety devices triggered due to:
- insufficient temperature reduction in boiler.
Fault elimination:
Lower working temperature of boiler
.
Press the reset button on safety thermostat
.
Main switch with green indicator light on but system
burner and pump not running
Meaning:
Blown fuse due to:
- voltage jump.
Fault elimination:
Replace fuse -
to be done by qualified personnel.
Burner block light on
Meaning:
Burner blocking device triggered due to:
-
gas shortage
- air in pipe (when system is new or after long idle
period).
Fault elimination:
Make sure the
gas valve is open and that the air in the
pipe has been bled.
Press the unblock button on the burner to restore
correct
boiler operation.
If the block device of the boiler continues
to trigger, do not try to restore operation
of the boiler on your own. Contact an
Authorised Assistance Centre.
ATTENTION!
The heating system can be effectively
protected against ice by using specific
antifreeze products suitable for multi-metal
plants.
Do not use car engine antifreeze as it
could damage the water gaskets.
Summary of Contents for PANEL BOARD DUAL-STAGE CASCADE
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