Lennox FCM 85 Installation, Operating And Maintenance Manual page 64

HEATING : GAS BURNER 60 & 120 kW
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)
FLEXYII_WSHP-IOM-1307-E
- 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
G20
G25 (Groningue)
G31 (GPL)
Fig.18
Supply Low Heat
pressure Injection min.
20.0 +/- 1 3.7 +/- 0.1
25.0 +/- 1.3 5.1 +/- 0.1
37.0 +/- 1.9 15.3 +/- 0.3
High Heat
Injection
10.4+/- 0.2
13.1 +/- 0.2
34.3 +/- 0.6
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