Lennox BCK 020 Installation Operating & Maintenance Manual page 15

INSTALLATION ON A ROOF MOUNTING FRAMES
ADJUSTABLE ROOFCURB DRAWINGS
2D
Page 14 - IOM / ROOFTOP BALTIC Series - 0803 - E
Roof opening 1642 x 1282
4D
BGK
030 035
BDK
(*) This roofcurb is also necessary for all cooling only or
heatpump rooftop with auxiliary electric heater or hot
water coil.
1D
Down Supply Air
2D
DownReturn Air
4D
Down main power entry
2D