PIETRO FIORENTINI REFLUX 819/FO, Technical Manual

Page: 41 / 93

TECHNICAL MANUAL MT103
41
6.2 Tab. 11 PM/819 MONITOR (FIG. 29 and 30)
PROBLEM POSSIBLE CAUSES APPARATUS REMEDY
Guide ring [20] damaged R14/A Pre-regulator Replace
Diaphragm [10] ruptured (fig. 30) Replace
Obturator [17] damaged Replace
Obturator [17] stuck in the open position 204/A Pilot (fig. 30) Control and clean if necessary
Spring [21] yielded Replace
Pressure
Reinforced gasket [7] damaged Replace
increase with Q>0
Ice formation between the reinforced gasket Increase the gas temperature at the
and the plug regulator inlet
Dirt between the reinforced gasket and the Clean and check gas filtering
obturator Regulator (fig. 29)
Obturator blocked Clean and check movement
Diaphragm fixed incorrectly Fix
Downstream sensing line dirty Clean
Occlusion of pressure chamber vent nozzle Clean
Obturator guide ring [35] damaged Replace
Feed too low Replace the spring [12]
Filter cartridge [13] dirty Replace
Occlusion by frost Increase temp. at the preregulator inlet
Occlusion by dirty R14/A Pre-regulator Check cartridge [13] filtering level
Diaphragm [10] ruptured (fig. 30) Replace
Reinforced gasket [9] swollen Replace
Pilot feed line broken Repair
Pressure drop
Diaphragm [16] ruptured 204/A Pilot Replace
Motorisation line to the regulator broken (fig. 30) Repair
Obturator blocked Clean and check movement
Diaphragm [50] ruptured Replace
Guide ring [36] damaged Replace
Breakage or leakage from vent nozzle Regulator (fig. 29) Repair
calibrated hole screwa
No pressure upstream Check cleanliness of line filter
acartridges
| sales@mvandc.com | Phone: 877.566.3837 | Fax: 925.407.2903