DESA Heating Products 125T Guide Du Propriétaire page 13

SERVICE PROCEDURES
Continued
NOZZLE ASSEMBLY
125T and 170T Models Only
1. Remove upper shell (see Upper Shell Removal, page 8).
2. Remove fan (see Fan, page 8).
3. Remove fuel and air line hoses from nozzle assembly (see
Figure 14).
4. Turn nozzle assembly 1/4 turn to left and pull toward motor to
remove (see Figure 15).
5. Place plastic hex-body into vise and lightly tighten.
6. Carefully remove nozzle from the nozzle adapter using 5/8"
socket wrench (see Figure 16).
7. Blow compressed air through face of nozzle. This will free
any dirt in nozzle area.
8. Inspect nozzle sleeve for damage.
9. Replace nozzle into nozzle adapter until nozzle seats. Tighten
1/3 turn more using 5/8" socket wrench 4.5 to 5.1 N-m (40 to
45 in-lbs). See Figure 16.
10. Attach nozzle assembly to nozzle adapter bracket (see Figure 15).
11. Attach fuel and airline hoses to nozzle assembly. See Fuel and
Airline Replacement and Proper Routing, page 12.
12. Replace fan (see Fan, page 8).
13. Replace upper shell (see Upper Shell Removal, page 8).
Combustion
Chamber
Nozzle
Adapter
Bracket
Photocell
Bracket
Air Line
Hose
Figure 14 - Removing Air and Fuel Line Hoses (125T and 170T
Models Only)
110429-01C
Nozzle/
Adapter
Assembly
Fuel Line Hose
For more information, visit www.desatech.com
For more information, visit www.desatech.com
SERVICE PROCEDURES
Combustion
Chamber
Figure 15 - Removing Nozzle/Adapter Assembly
Nozzle
Face
Nozzle
Air Line Fitting
Figure 16 - Nozzle and Nozzle Adapter
200T Model Only
1. Remove combustion chamber and ignitor by following steps 1
through 7 under Ignitor, page 10.
2. Carefully place the ignitor in a safe location.
3. Remove two nozzle adapter bracket screws (see Figure 17).
4. Place hex-shaped aluminum nozzle adapter into vise (do not
overtighten).
Combustion
Chamber
Nozzle
Adapter
Bracket
Photocell
Bracket
Air Line Hose
Figure 17 - Removing Air and Fuel Line Hoses (200T Model Only)
Nozzle/Adapter
Assembly
Nozzle Sleeve
Nozzle Adapter
Fuel Line
Fitting
Nozzle/
Adapter
Assembly
Fuel Line Hose
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