User Manual

© The Fulton Companies 2013
INSTALLATION PHW-IOM-2013-0214 SECTION 2
2-20
TABLE 3 - EXHAUST VENT PIPING REQUIREMENTS
Model PHW Type Base
Diameter
(inches)
Length (feet) Number of
90-degree
Elbows
300 Stainless Steel
AL294C
4
4
10 minimum
35 maximum
0
4
500 Stainless Steel
AL294C
4
4
10 minimum
35 maximum
0
4
750 Stainless Steel
AL294C
4
4
10 minimum
35 maximum
0
4
1000 Stainless Steel
AL294C
4
4
10 minimum
35 maximum
0
4
1400* Stainless Steel
AL294C
4
6
10 minimum
35 maximum
0
4
2000 Stainless Steel
AL294C
6
6
10 minimum
35 maximum
0
4
*A minimum 10 feet of 4 inch air intake and exhaust is required for the PHW-1400. Air
intake and exhaust con gurations over 10 feet in length will require 4 inches for the  rst
10 feet from the boiler, and then 6 inches up to an additional 40 feet, and four elbows.
Air Intake Supply and Exhaust Vent Installation
Adhere to the following for air intake supply and exhaust vent installation:
1. Air intake supply and exhaust vent pipes and  ttings are suitable for
vertical, through-the-roof or horizontal through-the-wall installation.
The vent system must be installed in accordance with the manufacturer’s
instructions.
2. All vent pipes and  ttings must be installed with appropriate air space
clearances to combustibles. These air space clearances apply to indoor or
outdoor vents—whether they are open, enclosed, horizontal or vertical or
pass through  oors, walls, roofs, or framed spaces. See Figure 14. The air
space clearances should be observed to joists, studs, sub oors, plywood,
drywall or plaster enclosures, insulating sheathing, rafters, roo ng, and any
other material classed as combustible.
3. The required minimum air space clearances also apply to electrical wires
and any kind of building insulation away from gas vent and out of the
required air space clearance.
4. Vertical runs or vent pipes and  ttings passing through  oors, ceilings, or
in framed walls must be  re stopped at  oors and ceilings. The  re stop
must close in the area between the outside of the vent and the opening in
the structure. (Figure 15). When passing through a  oor or ceiling frame,
provide an opening 5” to 9” air space clearance to vent pipe as applicable.
The  re stop  ts to the bottom of a framed opening 13 1/4” square. Nail
into the inside of the framed opening through the four holes in the ring.
The  re stop is placed on top of a framed opening 14 1/4” square with the
dished position down. Nail the  ange to the top of the framing.
! WARNING
Do not attempt to start boiler before
 lling and purging boiler heating system.
A dry  re will seriously damage the boiler
and may result in property damage or
personnel injury and is not covered by
warranty.
Operating the boiler beyond its design
limits is dangerous and may also cause
boiler damage. Do not attempt to upgrade
boiler performance with unapproved
modi cations.