PENSOTTI PCI 18, Instruction Manual

Page: 32 / 70

INSTALLATION INSTRUCTIONS
28
3.10 Venting
Improper venting of combination water heater can result in excessive levels of carbon monoxide
which can result in severe personal injury or death. This combination water heater must be vented in
accordance with the
“Venting of Equipment” section of the latest edition of the ANSI Z223.1 / NFPA
54 Natural Gas Code and/or the
“Venting systems and air supply for appliances” section of the latest
version of the CAN/CSA B149.1 Natural Gas and Propane Installation Code in Canada and in
accordance with all applicable local building codes.
Venting Guidelines
For best results, keep the vent system as short and straight as possible.
Locate the combination water heater as close as possible to the vent termination.
The combination water heater vent must not be common vented with any other gas appliance or vent
stack.
Slope vent upwards towards the vent terminal at a rate of 1/8
” per foot (1% slope).
Vent termination must be a minimum of 12
” above grade or expected snowfall.
Vent and air intake pipe must be supported every 4 feet of horizontal run and every 5 feet of vertical run.
PENSOTTI and Direct Vent
All PENSOTTI Combination W ater Heaters are prepared at the factory to be direct vent
(sealed combustion) units which draw all of their required combustible air directly from outside the building.
All PENSOTTI C o m b i n a t i o n W ater Heaters use
a 3/5” c oncentr ic vent (pol ypr op ylene inner
e x h a u s t p i p e w i t h a p a i n t e d a l u m in u m o u t e r p ip e ) .
The exhaust vent material must only be polypropylene. Do not use anything other than
polypropylene as a means of venting flue gases from the Pensotti Combination Water Heater.
Contaminated Make-Up Air Will Damage the Unit
We recommend not operating the combination water heater in an area that is or will be under construction
or renovation.
The PENSOTTI warranty will not cover damage and premature wear caused to the unit due to installation
in a contaminated environment.
All concentric venting must be checking for cross contamination using a combustion analyzer inserted into
the makeup air test port on the venting adapter. Analyzer must NOT
read anything in excess of “0 ppm”
Carbon Monoxide (CO). Any leaks must be repaired before continuing operation of the water heater.
Warranty will not be available if the water heater is used for construction heat.