Specifications

29
Figure 19: Optional Air Intake Piping Installation - Only Available with Beckett Burner
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E. MINIMUM CLEARANCES
See Figure 2 for details regarding clearances to
combustibles for the boiler.
F. OPTIONAL AIR INTAKE PIPING
INSTALLATION - All air for combustion can be
supplied directly to the burner from outdoors providing
that the criteria for chimney, vent connector and
minimum stack temperature outlined in this section
can be maintained. (ONLY AVAILABLE WITH
BECKETT BURNER). See Figure 19.
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1. General
a. Use 4" dia., single wall galvanized metal pipe
and fi ttings available at most heating distributors
for air intake piping. Maximum allowable air
intake length is 50 equivalent feet. Each elbow
is equal to 6 equivalent feet.
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b. Start at burner. Work toward air intake terminal.
c. Maintain minimum of 1/4 inch per foot slope in
horizontal run to air intake terminal. Slope down
toward air intake terminal.
d. Seal all joints gas-tight, using silicone caulk or
self-adhesive aluminum tape.
2. After determining location, cut a hole in the wall to
accept 4 inch air intake pipe. See Figure 19.
3. Remove the metal knockout in right side of burner
cover. Install Burnham Inlet Air Accessory Kit, Part
Number 611280031.
4. Mount the Vacuum Relief Valve Tee Assembly (P/N
8116268 included with Kit) or 90° elbow into the
burner inlet ring. See Figure 18.
a. Secure with at least three (3) sheet metal screws
evenly spaced around the burner inlet ring.
b. Assemble the vacuum relief valve balance
weight onto the gate. Refer to the vacuum relief
valve manufacturer's instructions.