Lennox FCM 85 Installation, Operating And Maintenance page 39

ENERGY RECOVERY INSTALLATION
STEP 4: Check
A good fit can be controled by looking at the junction between the rooftop and the recovery module:
In the same way, roof of the recovery module and the rooftop has to be at the same level
ROOFTOP
FLEXYII_WSHP-IOM-0909-E
The junction has to be at the same level.
SAME LEVEL
For 150 and 170 sizes, a deviation of 70mm
exists between rooftop and recovery module
(see picture on the right).
SAME LEVEL
MODULE
Size 150 & 170
70 mm
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