BLUEHELIX TECH RRT 24 H
183
EN
cod. 3541C661 - Rev. 00 - 10/2018
Periodical check
To ensure proper operation of the unit over time, have qualified personnel carry out a yearly inspection, providing for
the following checks:
•
The control and safety devices (gas valve, flow meter, thermostats, etc.) must function correctly.
•
The fume exhaust circuit must be perfectly efficient.
•
The sealed chamber must be tight.
•
The air-fume end piece and ducts must be free of obstructions and leaks
•
The burner and exchanger must be clean and free of deposits. Use suitable brushes for cleaning. Never use chem-
ical products.
•
The electrode must be properly positioned and free of scale.
The electrode can be cleaned of incrustations only with a non-metallic brush, and must NOT be sanded.
•
The gas and water systems must be tight.
•
The water pressure in the system when cold must be approx. 1 bar; otherwise bring it to that value.
•
The circulating pump must not be blocked.
•
The expansion tank must be filled.
•
The gas flow and pressure must match that given in the respective tables.
•
The condensate evacuation system must be efficient with no leakage or obstructions.
•
The trap must be full of water.
•
Check the quality of the water in the system.
•
Check the condition of the insulation of the exchanger.
•
Check the gas connection between the valve and Venturi.
•
Replace the burner gasket if damaged.
•
At the end of the check, always check the combustion parameters (see "checking the combustion values").
Extraordinary maintenance and replacement of components
After replacing the gas valve, burner, electrode and circuit board, it is necessary to carry out the 100% calibration (see
“100% calibration” on page 172). Then follow the instructions in par. “Checking the combustion values” on page 171.
Gas valve
fig. 35- Gas valve replacement
•
Disconnect the electrical power supply and turn off
the gas cock ahead of the valve.
•
Disconnect the connectors
•
Disconnect the gas supply pipe
•
Undo the screws
“1”
•
Remove the clamp
“2”
•
Remove the gas valve
•
Then undo the screws
“4”
•
Fit the new valve, carrying out the above steps in
reverse order.
Refer to the instruction sheet included in the kit
when replacing the gas diaphragm.
fig. 36- Gas diaphragm replacement
1
4
2
3
