User Guide

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1) If the boiler is installed on a framed wall, minimum acceptable framing is 2 x 4 studs on 16” centers. The boiler mount-
ing holes are on 16” centers for installation between two studs at the standard spacing. In cases where the boiler cannot
be centered between the studs, or where the studs are spaced closer than 16” apart, the boiler may be anchored to ¾”
plywood or horizontal 2 x 4s anchored to the studs.
2) 5/16” x 2” lag screws and washers are provided for mounting this boiler. These lag screws are intended for mounting the
boiler directly onto studs covered with ½” sheathing. When the boiler is attached to other types of construction, such as
masonry, use fasteners capable of supporting the weight of the boiler and attached piping in accordance with good con-
struction practice and applicable local codes.
3) Make sure that the surface to which the boiler is mounted is plumb.
4) Before mounting the boiler, make sure that wall selected does not have any framing or other construction that will inter-
fere with the vent pipe penetration.
5) Onceasuitablelocationhasbeenselectedfortheboiler,andanyneededmodicationshavebeenmadetothewall,use
Figure 5.1 to locate holes “A” and “B”. Make sure that the horizontal centerline of these holes is level. Holes “C” and
“D” may also be drilled at this time or after the boiler is hung on the wall. If the 5/16” x 2” lag screws are used, drill
3/16” pilot holes.
6) The wall mounting hook is used to secure the boiler to the shipping pallet. Remove this hook from the pallet and secure
to the wall using the 5/16” x 2” lag screws and washers, or other suitable anchors as appropriate (Figure 5.2). Make sure
the hook is level.
7) Hang the boiler on the wall hook as shown in Figure 5.2.
8) IfnotalreadydoneinStep(5)locateanddrillholes“C”and“D”usingtheobroundslotsinthebottommountingange.
Securethebottomangetothewallusingthe5/16”x2”lagscrews,orotherfastenersasappropriate(Figure5.2).
9) Verify that the front of the boiler is plumb. If it is not, install washers at holes “C” and “D” between the bottom mounting
angeandthewalltoadjust.
VI Air for Ventilation
Air for combustion must always be obtained directly from outdoors (see Section VII for intake piping). Although com-
bustion air must always be obtained directly from outdoors, ventilation openings may still be required to prevent overheat-
ing of boiler components if the boiler is installed in a small space, such as a closet.
 • IftherecommendedserviceclearancesshowninFigure4.1canbemaintained(withalldoorstotheroom 
closed), no ventilation openings are required for this boiler.
 • Iftheaboveserviceclearancescannotbemaintained,providetwoopeningsintotheroom,onenear 
  theoorandoneneartheceiling.Thetopedgeoftheupperopeningmustbewithin12”oftheceiling 
  andthebottomedgeoftheloweropeningwithin12”oftheoor.Eachoftheseopeningsmusthavea 
free area of at least 100 square inches. The “free area” takes into account the blocking effect of mesh
  grillesandlouvers.Wherescreensareusedtheymustbenonerthan¼”(4x4)mesh.
 • Ifthisboilerisinstalledinaroomwithotherappliances,provideadequateairforcombustionand/or
  ventilationinaccordancewiththeotherappliancemanufacturer’sinstallationmanualorapplicablecode. 
In cases where such provisions require two openings in excess of 100 square inches, no additional
opening area is required for this boiler.
WARNING
Outdoor combustion air must be piped to the air intake. Never pipe combustion air from
areas containing contaminates such as swimming pools and laundry room exhaust
vents. Contaminated combustion air will damage the boiler and may cause property
damage, personal injury or loss of life.