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1. Place boiler at a location as centralized to the
piping system and as close to the chimney or vent
terminal as possible to minimize condensation. At
input rates up to 1.75 gph (245,000 Btu/hr), the
supply and return from radiation may be piped on
the same end of the boiler. At higher rates, it is
recommended that the supply be piped from the
rear of the boiler and the return be piped from the
front of the boiler. Coordinate jacket installation
with piping. See "Jacket Assembly Instructions"
and "Piping Diagrams" in this manual for more
information.
2. See Figure 4 for installation on combustible
flooring. If necessary, place metal shims beneath
feet to ensure a level unit.
3. Accessibility clearances must take precedence
over fire protection clearances. Allow at least 24"
for servicing at the tankless and burner sides of the
unit. Allow at least 18" at a side where passage is
required for access to another side for servicing.
A 6" clearance from combustible material on all
sides and the top is recommended. 18" clearance
is necessary between smoke pipe and nearest
combustible material. See NFPA 31, latest revision,
for safe methods to reduce clearances where
necessary. NFPA publications are available at
Battery Park, Quincy, MA 02269.
CONSULT FIRE AUTHORITIES J
FOR LOCAL REQUIREMENTS
FIG. 5 -JACKETASSEMBLY (INDOOR BOILERS) 4. Hold panels 1 and 1A against burner end of
boiler and insert necessary piping through jacket
openings into boiler casting.
5. Screw acorn nuts onto stand-off bolts.
6. Screw 1" nipple and sight glass holder into hole
above burner.
7. Screw the ½" plug into tapping on upper left of
burner mounting.
8. Install panel 2 on opposite side of boiler in same
manner as panel 1.
9. Install panel 3 by attaching it with four sheet metal
screws to panels 1 and 2 (already in position).
1. See Figure 5 (above) for reference. Note that
all sheet metal screws are #10 unless specified
otherwise.
2. See hardware package in boiler accessory kit
for stand-off bolts, studs, acorn nuts, washers, and
½" pipe plug. Note that the sight glass assembly is
also found in the boiler accessory kit.
3. Screw double end stand-off bolts into castings
next to upper supply and lower return tappings
in both ends of the boiler. Screw three Sll?' studs
finger-tight into burner mounting.
10. Install temperature/pressure gauge into either
of the two 3A"tappings on top of the casting. Using
a 3A"x 4½" nipple, install relief valve in second top
tapping. Install jacket top panel (#4) by attaching
it with four sheet metal screws to the three jacket
side panels already in position.
To permit easy disassembly of overflow pipe in
order to raise jacket top panel for annual cleaning,
screw hand tight a 3A" nipple into the relief valve.
Attach a 3A" elbow to the nipple and an overflow
pipe to the elbow. (Nipple, elbow and overflow pipe
not supplied.) Do not connect directly to a drain,
