Maintenance & Repair
45
Inspect heating coil
and desoot as needed
Inspect and desoot coil annually
.
Most coils never require desooting. However, poor grades of fuel oil or inadequate
combustion air will cause heavy soot build-up on the outside surface of the heating
coil tubing. These deposits will insulate the coil, which then restricts air flow
through the heat exchanger and further aggravates the soot build-up. Be sure to
wipe the sight glass. See
Fig06172 on next page.
If soot has built up on the exterior of the coil
tubing,
clean as follows:
1)
Wear protective clothing, goggles, and gloves.
2)
Disconnect Fuel line from outer cover.
Disconnect Flame sensor and High Tension
Leads from black box bolted to the guard on
side of Outer Wrap.
3)
Remove (4) 5/16” Bolts from Outer Cover.
4)
Remove Outer Cover set aside.
5)
Remove (4) 5/16” bolts and nuts off the hold
down brackets on the Outer Wrap.
6)
Remove all inlet and outlet fittings.
7)
Remove the (2) 1-1/4” Jam nuts and the 3/8”
bolt underneath the base.
8)
Lift off Outer Wrap, Inner Wrap and Inner
Cover. Set aside.
9)
Using a couple of straps, wrap them around
the Coil and attach to a hoist to lift off. You
may also use the lifting eyes with hooks to lift
with hoist. This coil weighs at least 125 lbs. If
no hoist is available, it is recommended that
this become a 2-man job each with the ability
to lift at least 65 lbs.
10)
Clean the coil.
11)
Reassemble the coil and lids to the
machine. Make sure the white
insulation remains in place.
12)
Reattach high-pressure hose and
thermostat and make sure all fittings are
tight before using the machine.
Fig06288
Outer Cover
Inner Cover
Outer Wrap
Inner Wrap
Coil
Insulation
Gasket
