Lennox Fhm 170 User Manual

HEATING : MODULATING GAS BURNER 60 & 120 kW
FLEXYII_WSHP-IOM-0909-E Page 76
PRESSURE ADJUSTMENTS ON HONEYWELL PRESSURE
REGULATING VALVE
VK4105MB AND ON ELECTRONIC BOARD
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
having loosened the screw by one turn
Check and adjust if necessary the valve Inlet pressure to
20.0mbar (G20) or 25.0mbar for Groningen (G25) after gas
burner ignition (fig.26)
High & Low heat injection pressure check:
Electronic board W4115D1024
There is one board for two valves
Regulating valve VK4105MB
Electrical connections
230V power supply
Potentiometer
called
« CURRENT »
Switches in
position 3 for an
output intensity
varying until
330m
A
INPUT
OUTPUT
Actuator 0/10V
Common (wire 01
of the 24V)
Solenoid valve power
supply
Inlet pressure
measuring port
Adjusting nut (5mm) Minimum
Adjusting nut (8mm)
Minimum Pressure
Fig. 25
Fig. 26

Lennox Fhm 170 Specifications

General

Brand	Lennox
Model	Fhm 170
Category	Heat Pump
Language	English