Lennox FLEXY II Series Installation, Operating And Maintenance page 66

HEATING : MODULATING GAS BURNER 180 & 240kW
P
RESSURE ADJUSTMEN TS ON
VR4605MB
REGULA TING VALVE
W4115D1024
Pressure regulator adjustment with 300mbars gas
supply:
- The Burner must run in High Heat mode for this check.
- Place the tube of the "accurate" manometer on the Inlet
pressure port (Figure 27) of the Gas Regulating Valve after
hav ing loosened the screw by one turn
Check and adjust if necessary the valv e Inlet pressure to
20.0mbar (G20) or 25.0mbar f or Groningen (G25) after
gas burner ignition (fig.28)
IOM – FLEXY II – 1007 – E
H
ONEYWELL PRESSURE
AND ON ELECTRONIC BOARD
Inlet pressure
measur ing port
Fig. 27
Fig. 28
High & Low heat injection pressure check:
Electronic board W4115D1024
There is one board per valv e
230V po wer supply
OUTPUT
Solenoid valve po wer
supply
Regulating valve VK4605MB
Potentiometer
called
« CURRENT »
Switches in
position 3 for an
output intensity
varying until
330m A
INPUT
Actuator 0/10V
Common (wir e 01
of the 24V)
Shaft
Adjusting nut ( 7mm)
Minimum Pressure
Adjusting nut ( 9mm)
Maximum Pr essure
Electrical
connections
Page 64