Lennox Fhm 120 Installation, Operating And Maintenance Guide

HEATING : GAS BURNER 60 & 120 kW
FLEXYII_WSHP-IOM-1307-E - 62 -
Low Heat Injection Pressure Checks
- Switch the control to Low Heat
- Check and adjust if necessary the Outlet pressure to 3.7
mbar (G20) or 5.1 mbar for Groningue(G25) & 15.3 mbar
for propane (G31)(fig.18)
- After the adjustment of the low heat, re-verify the high
heat
- re-position the stoppers and close the pressure ports.
Pressure adjustments table for each type of gas (mbar)
Category
Supply
pressure
Low Heat
Injection min.
High Heat
Injection
G20 20.0 +/- 1 3.7 +/- 0.1 10.4+/- 0.2
G25 (Groningue) 25.0 +/- 1.3 5.1 +/- 0.1 13.1 +/- 0.2
G31 (GPL) 37.0 +/- 1.9
15.3 +/- 0.3
34.3 +/- 0.6
Fig.18

Lennox Fhm 120 Specifications

General

Brand	Lennox
Model	Fhm 120
Category	Heat Pump
Language	English