Ecoflam MULTICALOR 500.1 PR TC VGD 40.080 [22/80] Adjustment of gas minimum pressure switch

420010310300 MULTICALOR 500.1-600.1 PR/PR

REMOVING THE BLAST TUBE

REMOVING THE FIRING HEAD

ADJUSTMENT OF GAS MINIMUM PRESSURE SWITCH

Unscrew off and remove cover M. - Set regulator N to a value equal to 60% of gas nominal

feed pressure (i.e. for nat. gas nom. pressure = 20 mbar, set regulator to a value of 12 mbar;

for L.P.G. nom. pressure of G30/G31- 30/37 mbar, set regulator to a value of 18

mbar).Screw up cover M

ADJUSTMENT OF THE AIR PRESSURE SWITCH

Unscrew screws A and B and remove cover C.- Set the pressure switch to the mini-

mum by turning regulator D to position 1.

- Start the burner and keep in low flame running, while checking that combustion is

correct. Through a small cardboard, progressively obstruct the air intake until to

obtain a CO2 increase of 0,5÷0,8% or else, if a pressure gauge is available, connected

to pressure port E, until reaching a pressure drop of 1 mbar (10 mm of W.G.). -

Slowly increase the adjustment value of the air pressure switch until to have the bur-

ner lockout. Remove the obstruction from the air intake, screw on the cover C and

start the burner by pressing the control box rearm button.

Note: The pressure measured at pressure port E must be within the limits of the pressu-

re switch working range. If not, loose the locking nut of screw F and gradually turn the

same: clockwise to reduce the pressure; counterclockwise to increase. At the end tighten the locking nut.

2,5

0,4

0,6

0,9

1,8

2,4

gas pressure

switch

air pressure switch

The detector current is checked by inserting a microamme-

ter (scale 1000 µA - d.c.) in series with the uv cell..

The flame detector current has to been > 70 µA.

DETECTOR CURRENT

22 23

LANDIS �

LFL 1.622

Fotocellula

min 70 μA

Microamperometro �

fondo scala 1000 μA

UV CELL

Microamperometer

full scale 1000 µA