Duct Connections - Lennox FCM 85 Installation, Operating And Maintenance Manual

DUCT CONNECTIONS

RECOMMENDATIONS FOR DUCTS CONNECTIONS
Some rules must be complied with for the connections between ducts and unit done on site.
Whatever the supply configuration is, respect a minimal duct's length (D) of 2m before any elbow or any duct's diameter
change.
These recommendations are imperative in the case of 2 independent turbines (sizes from 150kW to 230kW and all units
equipped with gas module)
Horizontal supply
D ≥ 2m
D ≤ 2m
Vertical supply
D ≥ 2m
D ≤ 2m
Here are obvious bad examples of ducts connections noted on site:
FLEXYII_WSHP-IOM-1307-E - 12 -