41
4. If everything is all right the reduced output is automatically ignited and in case of a superior regulation to
a higher temperature the rated output is ignited. If the ignition cycle has run up without lighting the
burner then the failure signalisation lights up on the automatics. (see fig. no. 28). If repeatedly the main
burner hasn’t been lit then the main switch must be switched off, the failure must be found out and
eliminated (see chap. no. 16) and then repeat the whole procedure.
5. Check the gas escape.
6. Adjust and regulate the boiler heat output according to chap. no. 11. For the stoking test bring the
regulator into "chimney sweeper´s" operation. In this regime the boiler is operated with rated output
regardless the regulator setting.
7. Stoking test.
If the boiler is equipped with forced combustion products venting then the following operations are
to be carried out:
1. Set the boiler thermostat to temperature 85 ºC.
2. Bring the heating water temperature to 75 – 85 ºC.
3. Check whether there is vacuum in the draught diverter.
4. Check the correct function of smoke flue –the joints tightness.
5. Test by a full clogging of smoke-flue outlet (the burner must be shut down and the ventilator must stop
within 60 sec.)
6. Release the smoke-flue (the burner is ignited again).
7. Electrically disconnect the ventilator and interconnect the terminals 9 and 10 (in case of emergency the
combustion products return flow fuse must shut down the boiler burner within 60 sec.).
Attention: during this test there are escaping the combustion products into the boiler room.
8. Reinstall the original connection, switch off the burner through the operating thermostat (ventilator must
also stop).
11.3 Boiler heat output setting and adjustment
Output adjustment procedure at the boiler designated for natural gas combustion equipped
with DOUBLE STAGE GAS VALVE:
1.
Put the boiler into operation
2.
Measure the gas inlet pressure.
3.
Before the adjustment itself let the operating boiler pressure stabilize for a while.
4.
If there is installed the outdoor thermostat it must be disconnected during the output adjustment.
5.
Remove the High-Low coil plastic protective cover
Fig. no. 23
High-Low coil plastic protective cover removal
6.
Switch on and switch off several times the High-Low regulator by means of reduced output switch on
the control panel.
7.
Connect the manometer (U-tube) to the gas outlet pressure measuring point on the compact
electromagnetic valve.
8.
Switch over the switch I / II on the control panel to the maximum output (symbol II).
9.
By means of a nut wrench no.8 (for SIT SIGMA 843 valve by means of nut wrench no.10) turn the outer
adjusting screw for rated output setting. By turning clockwise the gas overpressure is growing and
vice-versa is dropping.
10. Switch over the switch I / II on the control panel to the reduced output (symbol I).
11. By using the screwdriver 3,5 mm adjust the reduced output through the regulator internal screw. By
turning clockwise the gas overpressure is growing and vice-versa is dropping.
12. After the adjustment completion check the correctness of set values after having switched on and off
twice the switch I / II..
13. If the adjusted gas supply values do not correspond to the required values the whole procedure must
be repeated.
Summary of Contents for GARDE G 42 ECO
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