PENSOTTI PNCC-32N, Instruction Manual

Page: 54 / 81

INSTALLATION INSTRUCTIONS
51
Maximum fire gas pressure
1) After completion of inlet gas pressure test (see above procedure) with the gas feed valve in the closed position
loosen the screw of pressure port no. 2 (fig 1.) and insert a gas manometer. Re-open the gas feed valve;
2) Use button to select the HEATING ONLY mode. The symbol will light up (solid light) to indicate the
selected operation mode;
3)
Turn on all available heating zones. The closure of the room thermostat(s) contact will then light the burner.
symbol will begin to blink.
4) Allow the boiler to fire. Press and hold the (reset button)
for several seconds until “F07” appears on the screen
(indicating high fire mode);
5) If gas pressure setting value is not the same as stated on the above Gas Data Table, adjust by removing the
modulator plastic cap A (fig 2) and screw in the nut C to adjust the maximum gas pressure. Use a 10mm wrench.
Minimum fire gas pressure
6) With the boiler still operating disconnect 1 of the 2 modulator power supply cables from the modulator E (fig 2).
The gas manometer will now indicate the minimum mechanical gas pressure. Refer to Gas Data Table above for
minimum pressure.
7) If the pressure value is different from that of the Gas Data Table turn screw D (fig.2) until the gas manometer
indicates the correct value. (Clockwise to increase pressure. Counter-clockwise to decrease pressure).
8) Re-connect the modulator power supply cable back to its original position.
9) Re-install the modulator plastic cap A to ensure the correct operation of the modulator.
10) Once the calibration procedure has been completed, use button to select the OFF mode indicated by
symbol , close the gas feed valve and remove the pressure gauge from the gas pressure point (fig.1).
Tighten the screw making sure there are no gas leaks.
11) To starting up the boiler, open the gas feed valve and use
button to select function mode required.
Pressures in excess of 14”WC may damage the internal
components of this boiler. Pensotti
REQUIRES replacment of
the gas valve if it is subjected to pressures in excess of
14
”WC. Faliure to comply could cause dangerous operating
conditions, fire, explosion, bodily injury or possible death.
FIG 2.