Concentric Venting System; Exhaust Vent And Air Inlet Pipe Installation - PEERLESS Pinnacle PO-70 Installation, Operation & Maintenance Manual

VENTING, INLET AIR & CONDENSATE
D. CONCENTRIC VENTING SYSTEM
1. The concentric venting system used with this
appliance consists of an inner pipe constructed of
polypropylene or stainless steel and an outer pipe
made of aluminum.
2. The inner pipe provides a path for the exhaust gases
to exit the boiler to the outdoors while space between
the pipes allows outdoor air to be conveyed to the
boiler.
3. The minimum vent length is 14 equivalent feet for
models PO-70 and PO-84 and 25 feet for models
PO-70A and PO-84A. This minimum length is
required to obtain the efficiency rating of this product.
The maximum vent length is 80 equivalent feet. Since
the air inlet pipe is integral to the vent, the same
minimum and maximum vent lengths apply.
4. The following chart gives equivalent lengths for
several common venting components.
Fitting Description
Elbow, 90°
Cleanout Tee
Elbow, 45°
Vertical Vent Termination
Sidewall Vent Termination
Figure 3.1: Location of Exit Terminals of Mechanical Draft and Direct-Venting Systems
6
Equivalent Length
5
5
3
0
0
E. EXHAUST VENT AND AIR INLET PIPE
INSTALLATION
1. Only polypropylene vent material supplied by PB
Heat, LLC is to be used with this appliance.
2. Horizontal lengths of vent pipe must slope towards the
boiler at a pitch not less than 1/4" per foot (20 mm
per meter) to allow condensate to drain from the vent
pipe into the boiler. If the vent pipe must be piped
around an obstacle that causes a low point in the
pipe, a drain pipe must be connected to this low point
to provide drainage.
3. All piping must be fully supported. Use pipe hangers
at a minimum of 4 foot (1.2 meter) intervals to
prevent sagging of the vent pipe where condensate
may form.
4. Do not use the boiler to support any piping. All piping
is to be supported externally.