Greenheck PVe (472846) - Manual (Page 7)

7 Model PVe Heat Recovery Unit
Isometric view of unit on rails
Side view of unit on rails
Unit Size A B* C* D
PVe-20 5 14 13.25 7.75
PVe-35 5 14 12.00 6.50
PVe-45 5 14 15.50 10.5
PVe-55 5 14 18.75 13.25
All dimensions are shown in inches.
*Zones B and C identify regions/zones where rails may not
be place due to ductwork.
Rail Mounting / Layout
1. Rails designed to handle the weight of the unit
should be positioned as shown on the diagram (rails
by others).
2. Make sure that rail positioning does not interfere with
the supply air discharge opening or the exhaust air
intake opening on the unit. Avoid areas dimensioned
“B or C” below.
3. Rails should run the width of the unit and extend
beyond the unit a minimum of 12 inches on each
side.
4. Set unit on rails.
D C A B
Ductwork Connections
Examples of poor and good fan-
to-duct connections are
shown. Airflow out of the
fan should be directed
straight or curve the
same direction as the
fan wheel rotates. Poor
duct installation
will result in low
airflow and other
system effects.
R
ot
atio n
POOR
Recommended Discharge Duct Size and Length
Unit Size Blower Size Duct Size Straight Duct Length
PVe-20 9 14 x 14 36
PVe-35 10 20 x 20 36
PVe-45 12 20 x 20 36
PVe-55 15 28 x 28 60
All dimensions are shown in inches.
• Recommended duct sizes are based on velocities across the
cfm range of each model at approximately 800 feet per minute
(FPM) at minimum airflow and up to 1600 fpm at maximum
airflow. Recommended duct sizes are only intended to be a
guide and may not satisfy the requirements of the project.
Refer to plans for appropriate job specific duct size and/or
velocity limitations.
• Straight duct lengths were calculated based on 100% effective
duct length requirements as prescribed in AMCA Publication
201. Calculated values have been rounded up to nearest foot.
R
ot
atio
n Length of Straight Duct
GOOD