16
checK safeTY conTrol circuiT
after
burner adjustments have been made for satisfac-
tory performance.
A. High limit control: remove cover and note
temperature setting. See
figure #13
. With
the burner operating, decrease this setting
to the minimum point. When boiler water
temperature exceeds this set point, the high
limit switch will open, shutting off the power
to the oil burner. Return setting to desired
high limit point. Burner should restart.
B. Primary control and flame sensor:
check:
1.
flame failure
- simulate by shutting off oil sup-
ply with hand valve while burner is on. Sixty
seconds after flameout, the safety switch locks
out, ignition stops, motor stops and oil valve -
when used - closes. To restart, open oil supply
valve and reset safety switch.
2.
ignition failure
- with burner off, close oil sup-
ply valve and run through start-up procedure,
The safety switch should lock out as in flame
failure.
3.
power failure
- Turn off main power supply
switch while burner is operating. When burner
stops, restore power and burner should start.
If operation is not as described as above, check
wiring and controls.
OPERATING INSTRUCTIONS
model
No.
end
cone
static
Disc
air Band
setting
air shutter
setting
Head
setting
low Firing
Rate Baffle
SFM4150
F-6
2¾
2
6
–––––
0
SFM5175
F-12
3U
3
5
–––––
0
SFM5200
F-12
3U
5
5
–––––
0
SFM6225
–––––
L1
4
6
1
–––––
SFM7275
–––––
L1
4
6
2
–––––
Information in above table uses Beckett model AFG burner for model numbers SFM4150-5200 and Beckett model
SMG for models 6225 and 7275.
preVenTiVe MainTenance
of an oil fired boiler
reduces operating costs. The boiler and vent pipe
should be inspected for accumulation of soot or
scale deposits periodically but at least once ev-
ery year before the start of each heating season.
When soot is present on the section walls and
flueways, improper combustion will result, caus-
ing additional sooting and scaling until flueways
are completely closed. To remove soot and scale
from the flueways, remove top jacket panel, top
clean-out plate, open burner swing door. (See
figure #9
next page)
periodic inspecTion
and tightening of the
tankless heater/cover plate bolts will reduce the
risk of leaks. See part number 6, in
figure #14
,
Replacement Parts “Heat Exchanger”
section in
the back of this manual.
insTrucTions for opening Burner
swing door
1. Turn off power to boiler.
2. Allow boiler to cool down.
3. Disconnect power cable at factory supplied
burner electrical disconnect. See
figure #9
4. Loosen screws on the sides of the lower front
jacket panel. See
figure #9
.
5. Pull the bottom part of the lower front panel
forward.
6. Lift the lower front panel up and off the boiler.
See
figure #9
.
Summary of Contents for SFM24150W
Page 2: ......
