Pressure Switch - Joannes JM 3 Manual Para La Instalación Y El Mantenimiento

● Perform 10 burner startups; these correspond to 10 safety lock-outs. Read the gas meter again; by subtracting
the first reading, the Q1 value is obtained.
Example: First reading
Final reading
total Q1
● By performing these operations, we can find Ts1 by timing no. 1 startup (safety lock-outs) by the no. of
startups.
Example:
● If, at the end of this checkup, the value is above 100, regulate the opening speed of the main valve.
CALIBRATION OF AIR PRESSURE SWITCH
The air pressure switch places the burner in safety mode or shuts it down should there be a drop in combustion
air pressure. It will be calibrated at a pressure below 1st stage rated-flow on-burner air pressure, checking that
CO values do not exceed 10,000 p.p.m..
CALIBRATION OF MINIMUM GAS PRESSURE SWITCH
The minimum gas pressure switch serves to prevent the burner from being started up or to shut it down if the
gas pressure falls below the minimum required level. This setting should be 40% lower than the gas pressure
obtained with the burner operating at maximum delivery.

PRESSURE SWITCH

Type: LGW 3 A2
LGW 10 A2
GW 50 A5
GW 150 A2
GW 150 A5
Remove the cover and adjust
dial A
Model
JM 3
JM 6
JM 9
00006,682 liters
00006,947 liters
00000,265 liters
Actual safety time = 1"95
Ts1 = 1"95 x 10 = 19"5
Pressure
connector
Air pressure switch
DUNGS type
LGW 3 A2
LGW 10 A2
LGW 10 A2
Gas pressure switch
Setting range
mbars
0,4 - 3
1 - 10
1 - 10
DUNGS type
GW 50 A5
GW 150 A2
GW 150 A5
GW 150 A2
GW 150 A5
44
Setting range
mbars
5 - 50
5 - 150
5 - 120
5 - 150
5 - 120