Monitor 21 - Page 40

MONITOR HEATING SYSTEMS
Section 5: Servicing
3.
Turn counter-clockwise to remove combustion
ring.
If ring does not turn, pull up slightly to
loosen retaining clips.
4.
Use wire brush to clean inside of combustion
chamber.
Vacuum and wipe clean with
a waste cloth.
5.
If tar is present on the bumer bottom, remove
the tar by using
a flat-bladed screw driver or
wire
brush.then clean the area by using a
vacuum cleaner etc.
NOTE: Make sure all air inlet openings are clear.
6.
When cleaning the inside of me bumer pot,
remove
the igniter and change the burner cloth
by the following procebure.
7. On the Monitor 422
A. Apply glue(P/Na&lT) on the burner bottom
as shown in Figure5-1.
u
Figure 5-1
B. Put the burner cloth on the burner bottom,
afterwards press and straighten
out the
burner cloth so that it is glued flat and even
on the burner bottom.
8. On the Monitor 44l
A. Apply glue arround the burner cloth as
shown in Figure 5-2.
1 [jy-'m I
Oue
\
.
b --___..'
*OePl 'Is- Ftgure 5-2
B. As shown in Figure 5-3 and 5-4, insert the
Burner Cloth
narrow between the Nozzle
Collar and the Igniter Shield, then push
the
Bumer Cloth, using your fingers or a screw
driver, so that
it slips in under the Naule
1 Nozzle Collar )I
Figure 5-3 Rgure 54
C. Apply glue at all 4 corners of Burner Cloth
as Shown in Figure 5-5.
Awroa. 318
NOTE: The Burner Cloth is not symmetrical in
shape, therefore make sure to place
it in
the correct position so that the wider side
of the cloth is at lett side of the lgniter
Shield
as shown in Figure 55.
9. Combustion ring may deform and deteriorate
after several years
we and should be cleaned
and inspected before reinstallation.
If combus-
tion ring is warped, has cracked or is detenorat-
ing excessively it should be replaced.
10. When reassembling the unit check that com-
bustion ring is positioned with
the correct side
up and is sitting squarely on all three support
screws(~22) or pins(Ni-441) inside the bumer
Pot.
11. Reassemble by reversing the procedure foll-
owed during disassembly.
Collar.
Afrerwards press and straighten out
the Bumer cloth so that
it is glued fiat and
NOTE: Use of the economy plus feature can
even on the Burner battom.
minimize service calls and extend corn-
NOTE: in some mes, pulling out the Fuel Nozzle
ponent life.
and Collar may make
this procedure easier.
An
easy out can be inserted into nozzle to
hetp break loose and remove it.
40