CONQUEST
®
WATER HEATER
20
PV500-71 02/16
7.3 Remote Combustion Air Cap
A suitable remote air termination must be used to prevent water, debris, animals or obstructing material from entering
the remote air supply.
7.4 Vertical or Horizontal Remote Air Duct Termination
•
Air inlet must be located no less than 3 feet (0.91m) below the exhaust terminal if they are within 10 feet (3.05 m)
of each other, unless the flue outlet terminates with a straight discharge. If the flue outlet terminates with a
straight discharge, the air inlet can be located no less than 18 inches (0.46m) below the exhaust terminal.
•
If terminating through the roof, the air inlet must terminate at least 12 inches (0.3 m) above roof level and at least
12 inches (0.3 m) above snow levels.
•
If terminating through a sidewall, the air inlet must terminate at least 12 inches (0.3 m) above grade and/or at
least 12 inches (0.3 m) above possible snow levels.
Vertical Remote Air
Horizontal Remote Air
*
When flue outlet is terminated with a straight discharge, separation of terminations must be a minimum of 18
"
.
7.5 Combining Remote Air Ducting
Each water heater MUST have separate intake piping, unless the air inlet piping, exhaust duct and other system
considerations have been fully evaluated and a combined duct system designed by one of the duct design firms
identified at
www.pvi.com/vent-design.html
. Before operation of a combined remote air ducting system, all of the duct
design firm’s system installation and operation requirements must be in place, their instructions followed and the
system must be properly maintained.
Combined Conquest air intake piping must incorporate a variable speed blower capable of providing and regulating
positive pressure air supplied to all water heaters in the system.
The pressure of the supplied air must not be less
than 0.0 W.C. and must not exceed 0.25" W.C
.
The common combustion air supply system must be interlocked, so the water heaters will not begin operation until
the common combustion air supply is proved to be within the range of 0.0 to 0.25" W.C. See Section on
Remote
Connections
for a discussion of how to connect the proving circuit.
WARNING: Do not combine remote air ducting of multiple appliances into a single remote air duct unless the
combined remote air ducting system has been evaluated and designed by a specified duct design firm and
the combined remote air duct system is installed, operated and maintained following instructions from that
firm. Combining remote air ducting without following these requirements can result in failure of the water
heater and venting system and/or exposure to carbon monoxide and can result in property damage,
personal injury or death.
Notes: