U.S. Boiler Company Burnham Hydronics Revolution RV3, Installation, Operating And Service Instructions, Page: 33 / 100

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Fire stop manufacturers are Air-Jet, American Metal
Products, Metal-Fab, and Simpson Dura-Vent.
11. Whenever possible install vent straight through roof.
Refer to Figure 16 if offset is necessary. Maintain
minimum clearance to combustible materials.
12.
Install Vent Terminal.
a. Size roof opening to maintain minimum clear-
ance from combustible materials.
b. Use appropriately designed vent fl ashing when
passing through roofs. Follow fl ashing manufac-
turers’ instructions for installation procedures.
Flashing manufacturers are Air-Jet, American
Metal Products, Metal Fab, and Simpson Dura-
Vent.
c. Extend vent pipe to maintain minimum vertical
and horizontal distance of twelve (12) inches
from roof surface. Allow additional vertical
distance for expected snow accumulation.
Provide brace as required. Refer to Figure 18.
d. Vertical venting requires fl ashing and a storm
collar to prevent moisture from entering the
structure.
e. Install storm collar on vent pipe immediately
above fl ashing. Apply Dow Corning Silastic 732
RTV Sealant between vent pipe and storm collar
to provide weathertight seal.
f. Attach vent terminal.
13. Install 90° aluminum elbow from kit onto collar of
burner enclosure inside jacket assembly. See Figure
19.
NOTE: RV3-RV4 uses 3 inch aluminum 90° elbow.
RV5-RV7 uses 4 inch aluminum 90° elbow.
14. Secure 90° aluminum elbow to burner enclosure
collar and seal with RTV.
15. Insert protective cover into air intake opening in
jacket top panel. See Figure 19.
NOTE: RV3-RV4 uses 4 inch cap
RV5-RV7 uses 5 inch cap
1. Do not exceed maximum vent length. Refer to
Table 4.
Horizontal
–
2. Maintain minimum ¼ inch per foot slope in horizon-
tal runs.
3 Recommended horizontal installation consists of
vent being sloped down toward boiler. See Figure
15.
4. Use appropriately designed thimbles when passing
through combustible walls (thimble use optional for
noncombustible walls). Insert thimble through wall
from outside. Secure outside fl ange to wall with
nails or screws, and seal with sealant material.
Install inside fl ange to inside wall, secure with nails
or screws, and seal with sealant material.
5. For noncombustible wall application when thimble
is not used, size opening such that female (bell) end
with locking band attached cannot pass through.
6. Join vent terminal to vent pipe. Locate vent
terminal between six (6) inches and twenty-four (24)
inches from wall when joined to inside vent piping.
See Figure 17.
7. Insert vent pipe through thimble/opening from
outside and join to vent system. Apply sealant
between vent pipe and opening/thimble to provide
weathertight seal.
8. Join vent terminal to 45° elbow included in kit. Join
45° elbow/terminal assembly to vent pipe. Refer to
Sections C through E for proper procedures for
joining vent pipe and fi ttings.. See Figures 3 (A, B,
C and D).
Vertical
–
9. Slope horizontal runs minimum ¼ inch per foot.
Slope down towards boiler.
10. Install fi re stops where vent passes through fl oors,
ceilings or framed walls. The fi re stop must close
the opening between the vent pipe and the structure.