23
c. From exterior of building, insert air box sub-
assembly into square opening. Push air box
inwarduntilwallangeisagainstwall,checkfor
level and mark the location of the four (4)
securing holes on the exterior wall. Remove air
box from wall.
d. Drill four (4) pilot holes, properly sized for the
non-corrosive fasteners (stainless steel, brass, or
aluminum)tobeusedtosecurethewallangeto
the exterior wall. (Securing screws not supplied
with kit.)
e. Attach four (4) 1/2 inch long threaded aluminum
spacerstotheouterangesoftheexteriorwall
angewithfour(4)number10-32x1/4inch
stainless steel machine screws provided.
(See Figure 11.)
f. Apply a 1/4 inch thick continuous bead of
silicone caulk to perimeter of exterior wall
ange’
sbacksurfacetoprovideaweathertight
seal.
g. Reinstall air box sub-assembly into opening in
exterior wall and secure to wall.
WARNING
Non-corrosive fasteners must be used.
h. Apply a bead of silicone caulk to perimeter of
wallange,wherethewallandangejoin.Use
atooloryourngerandapplypressurewhile
smoothing caulking to provide a weathertight
seal.
i. From interior of building, insert end panel with
collar and vent pipe assembly into open end of
air box sub-assembly. (See Figure 11.)
j. Secure end panel to air box sub-assembly with
shipping screw and thirteen (13) number 8 sheet
metal screws provided.
k. From exterior of building, position 10 inch
square exterior wall cover over exterior wall
ange.Insert3inchdiameterventpipeinto
center opening in terminal cover. Align four (4)
holes on cover with 1/2 inch long threaded
spacersonwallange.Secureterminalcover
with four (4) number 10 - 32 x 1/4 inch stainless
steel machine screws provided.
l. Apply a bead of silicone caulk to perimeter of
plate-seal and around pipe. Secure plate-seal to
exterior cover with six (6) #8 stainless steel sheet
metal screws provided. Smooth caulk around
plate-seal and pipe to provide weathertight seal.
m. Install Vent Terminal supplied with boiler
(P/N 8116308) to vent pipe penetrating through
terminal cover. Join terminal and pipe with
locking band and seal with RTV (see Figure 3).
3.
Install Vent Piping. See Figure 10 and 11.
a. Start at vent connector on boiler and work
towards combination vent/air terminal.
b.
Maintain minimum 1/4 inch per foot slope down
towards boiler in horizontal runs.
c. Recommended horizontal installations consists
of vent being sloped toward boiler.
d. Use 3/4 inch pipe strap to support horizontal runs
and maintain vent location and slope. Maximum
supportspacingisve(5)feet.
e. Install vent piping to connect vent connector on
boiler and combination vent/air terminal.
Reference Section B - General Venting Guide-
lines for proper procedure for joining pipe and
ttings.
f.
Connect vent piping to combination vent/air
terminal. See Figure 10.
4. Install Air Intake Piping. See Figures 10 and 11.
a. Do not exceed air intake length. See Table 4.
b. Usesinglewallmetalpipeandttingsavailable
at most heating distributors, unless using PVC
air intake kit (P/N 6116054), see Section III. H.
This kit will allow S & D (thin wall) PVC to be
used for air intake piping.
c. Air intake pipe diameter is based on boiler size.
RV3 - RV4 – uses 3 inch diameter piping*
RV5 - RV7 – uses 4 inch diameter piping
* The PVC air intake kit (P/N 6116054), if used, will
increase air intake pipe diameter to 4 inch.
d. Start at collar on burner enclosure (inside boiler
jacket) and work towards the combination vent/
air terminal.
e. Maintain minimum of 1/4 inch per foot slope on
horizontal runs. Slope down towards boiler.
f. The air intake pipe must be adequately supported
withstrapsorsupportsnolessthanve(5)feet
apart on horizontal runs. The complete air intake
piping system must be rigid and able to with-
stand minor impacts without collapse.
g. Connect Air Intake Piping to Combination Vent/
Air Terminal. See Figure 10.
NOTE: When installing 3 inch diameter air intake
piping for a RV3 or RV4 application, the use of a 4
inch x 3 inch reducer will be required to connect air
intake piping to combination vent/air terminal.
(Reducer included with combination horizontal
venting kit).
h. Seal all joints airtight, using silicone caulk or
self-adhesive aluminum tape.