Fulton Pulse HW (PHW) Fully Condensing Hydronic Boiler - Manual (Page 25)

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SECTION 2
PHW-IOM-2013-0214
INSTALLATION
2-19
Air Intake & Exhaust Piping Requirements for the
Pulse Boiler
Adhere to the following for air intake and exhaust piping:
1. Use piping that matches the inlet/outlet connection sizes for the fi rst 35
feet and 4 elbows closest to the boiler. See Tables 2 and 3.
The piping can be extended to 100 feet and 6 elbows by increasing the
pipe size to 6” for the PHW300 - PHW1000, and to 8” for the PHW2000.
For the PHW1400, the air intake and exhaust piping must be 4” for the fi rst
10 feet and then piping must be upsized to 6” for up to 40 feet. If going
beyond 40 feet, instead of upsizing to 6” after the fi rst 10 feet, upsize to
8”.
It is acceptable to extend the piping up to 100 feet and 6 elbows with
proper sizing.
2. A minimum of 10 feet of piping is required on the air intake (even if
taking combustion air from the boiler room) or exhaust. This creates the
appropriate amount of backpressure for pulse combustion to operate
properly.
3. If air intake or exhaust layouts require upsizing, keep the fi rst 10 feel closest
to the boiler matching the outlet connection size of the boiler.
4. If utilizing a common header pipe for multiple pulse boilers, the pressure
drop across a common intake pipe must be neutral. The pressure drop
across a common vent pipe must be between -0.1 and 0” W.C. if not
utilizing a mechanical draft system.
5. Exhaust runs should, individually, not have pressure drops of more than
3.0” WC. Intake is +2.0”WC.
TABLE 2 - AIR INTAKE PIPING REQUIREMENTS
Model PHW Type Base
Diameter
(inches)
Length (feet) Number of
90-degree
Elbows
300 PVC 3
3 10 minimum
35 maximum
0
4
500 PVC 3
3 10 minimum
35 maximum
0
4
750 PVC 4
4 10 minimum
35 maximum
0
4
1000 PVC 4
4 10 minimum
35 maximum
0
4
1400* PVC 4
6 10 minimum
35 maximum
0
4
2000 PVC 6
6 10 minimum
35 maximum
0
4
!
WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct, and strict
adherence to applicable jurisdictional/
professional codes and regulations.