Pennco 3KW0.60 - Manual (Page 21)

21
NOZZLES AND ELECTRODES: Use proper size, spray
angle, and spray pattern nozzle. Refer to recommended
nozzle selection charts at end of this manual. To install
nozzle, remove nozzle line electrode assembly, if necessary
remove retention ring assembly, and install and tighten
nozzle. Take care not to damage electrode insulators or
bend electrode tips. After installing nozzle, reassemble
nozzle line electrode assembly and set electrode tip
spacing. Electrode tip spacing may need to be set prior
to reassembling nozzle line electrode assembly. Refer to
figures on following pages for setting electrode tip spacing
on Beckett.
FINAL BURNER ADJUSTMENTS: Final burner
adjustments must be made using combustion test
instruments. Initial settings for burner are shown at back of
this manual.
Set burner accordingly. Check draft over fire to verify
it is between -0.01” WC and -0.02” WC, adjust draft as
necessary. After operating 10 minutes to warm up boiler,
use combustion test equipment to take smoke reading in
flue pipe between boiler and draft regulator. Smoke reading
should be zero to trace (Shell Bacharach Scale). A new
boiler may require more than 10 minutes to burn clean due
to oil film on new heat exchanger. If smoke reading is zero,
gradually close burner’s air adjustment to obtain smoke
reading showing trace smoke reading. Once smoke reading
is trace, measure CO
2
and as insurance margin increase air
to sufficiently reduce CO
2
by 1/2% to 1%.
If clean fire cannot be obtained, it will be necessary
to verify burner head and electrode alignment. Proper
electrode alignment figures are presented on following
pages. If fire continues to be smoky, replace nozzle with
correct replacement.
Once burner is completely adjusted, burner should be
started and stopped several times to assure good operation
with no fluttering or rumbling. Verify there are no oil leaks
and record nozzle size, oil pressure, combustion readings,
and air settings on tag or label that can be attached to
burner or, boiler.
DO NOT TAMPER WITH THE UNIT OR CONTROLS
IMPORTANT: Installer follow these instructions care-
fully.
DRAFT REGULATORS: Barometric draft regulator is
required for controlling draft through boiler. Barometric
draft regulator is mounted in chimney connector.
Refer back to section on “CHIMNEY AND CHIMNEY
CONNECTIONS”. Once draft regulator is installed, use
draft gauge to adjust to proper opening: combustion
chamber over fire draft will be approximately -0.01” WC to
-0.02” WC and stack draft will be approximately -0.02” WC.
to -0.04” WC. On larger installation, greater draft may be
required in stack to obtain desired over fire draft.
STARTING: Fill system with water. Vent all air from system
following section “FILLING THE BOILER”.
FUEL UNITS AND OIL LINES: Install oil line(s) to oil
burner. Use heavy wall copper tubing and flared fittings,
do not use compression fittings. All connections and joints
must be airtight. Use appropriate non-hardening thread
sealing compound on threaded connections, not Teflon
tape. See fuel unit data sheet furnished with burner for
sizing, lift, and length of tubing recommendations.
Original equipment oil burner (when furnished) is equipped
with single stage fuel unit with bypass plug removed for
single pipe installation. This is satisfactory where fuel
supply is on same level as, or above burner, permitting
gravity flow of oil. Per NFPA31 requirements, never exceed
3 psig pressure to inlet side of fuel unit. When necessary
to lift oil to burner, two-pipe installation is required. Run
return line between fuel unit and oil supply. When two-pipe
installation is used, bypass plug (furnished with burner)
must be installed in fuel unit. Refer to fuel unit instructions
furnished with burner for specific instructions on installing
bypass plug. Do not exceed fuel unit manufacturer’s
recommendations for running vacuum.
NOTE: If lift exceeds 14 feet for Beckett burners, two stage
fuel unit is required with return line.
Install oil filter of adequate size inside building between
tank shutoff valve and oil burner. For ease of servicing,
locate shutoff valve and filter near oil burner.
AIR SUPPLY FOR COMBUSTION: Do not install boiler
in rooms with insufficient air, unless corrective steps are
taken. It may be necessary to install windows or cut holes
in door to rooms used for supply air to obtain sufficient
combustion air and prevent less than atmospheric air
pressure in that room. If there is lack of combustion air,
burner flame will be dark orange and formation of soot
will occur in heating unit. In buildings of conventional
frame, brick, or stone construction that do not have utility
rooms, basement windows, or stair doors, air infiltration is
normally adequate to provide enough air for combustion
and for operation of barometric draft control. Room used
for supplying combustion air should be isolated from any
area served by exhaust fans. Refer back to the section on
“FRESH AIR FOR COMBUSTION” for additional sizing
guidelines.
OPERATING THE BOILER