Lennox FLEXY II Series Installation, Operating And Maintenance page 63

HEATING : MODULATING GAS BURNER 60 & 120kW
P
RESSURE ADJUSTMEN TS ON
VK4105MB
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 25) 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.26)
IOM – FLEXY II – 1007 – E
H
ONEYWELL PRESSURE
AND ON ELECTRONIC BOARD
Inlet pressure
measur ing port
Fig. 25
Fig. 26
High & Low heat injection pressure check:
Electronic board W4115D1024
There is one board f or two valv es
230V po wer supply
OUTPUT
Solenoid valve po wer
supply
Regulating valve VK4105MB
Adjusting nut ( 5mm) Minimum
Pressure
Adjusting nut ( 8mm)
Maxi mum Press ure
Electrical connec tions
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)
Page 61