Service Procedures - Desa Master B35CED Manuel D'utilisation

SERVICE PROCEDURES

6
GB
SERVICE PROCEDURES
WARNING: Never service heater while it is plugged in,
operating, or hot. Severe burns and electrical shock can
occur.
UPPER SHELL REMOVAL
1. Remove screws and lock washers along each side of heater
using 5/16" nutdriver. These screws attach upper and lower
shells together.
2. Lift upper shell off.
3. Remove fan guard.
FUEL FILTER
(35.000 and 70.000 Btu/Hr Models)
1. Remove side cover screws using 5/16"nut-driver.
2. Remove side cover.
3. Pull rubber fuel line off fuel fi lter neck.
4. Carefully pry bushing and fuel fi lter out of fuel tank.
5.Wash fuel fi lter with clean fuel and replace in tank.
6.Attach rubber fuel line to fuel fi lter neck
7.Replace side cover.
FUEL FILTER
(100.000 and 150.000 Btu/Hr Models)
1. Remove side cover screws using 5/16"nut-driver.
2. Remove side cover.
3. Pull upper fuel line off fuel fi lter neck.
4. Carefully pry bushing, lower fuel line, and fuel fi lter out of fuel
tank.
5. Wash fuel fi lter with clean fuel and replace in tank.
6. Attach upper fuel line to fuel fi lter neck.
7.Replace side cover.
A.
B.
Figure 7-8 – Upper Shell Removal.
A.
B.
C .
Figure 9 – Fuel Filter Removal, 35.000 and 70.000 Btu/
Hr.
Figure 10 – Fuel Filter Removal, 100.000 and 150.000 Btu/
Hr.
SPARK PLUG
(35,000 Btu/Hr Model)
1.Remove upper shell.
2.Remove fan (see page 9).
3.Remove fuel and air line hoses from nozzle assembly.
4.Remove spark plug wire from spark plug.
5.Remove two screws using 5/16" nut-driver and remove burner
strap.
6.Place hex-body of spark plug into vise and tighten.
7.Remove spark plug mounting nut using 11/16" open-end
wrench.
8.Remove burner strap from spark plug.
9.Clean and regap spark plug electrodes to 1.4 mm (.055")
gap.
10.Replace burner strap onto spark plug. Rotate burner strap to
position spark plug electrodes (see Figure 13).
11.Tighten spark plug with spark plug mounting nut.
12.Release hex-body of spark plug from vise.
13.Replace burner strap onto combustion chamber.
14.Attach spark plug wire to spark plug.
A. Upper
15.Attach fuel and air line hoses to nozzle assembly.
shell
16.Replace fan (see page 9).
B. Fan guard
17.Replace fan guard and upper shell.
A.
A. Fuel Filter
B. Side cover
C. Fuel line.
Figure 11 – Spark plug removal, 35.000 Btu/Hr model.
A.
C .
B.
C .
D . E.
G .
H .
B.
A. Fuel Filter,
Bushing, and
Lower Fuel
Line
B.Upper fuel
line
C. Side cover.
A.Combustion
Chamber
B.Spark plug Mounting
nut
C.Burner sprap
D.Spark plug
E.Spark plug wire
F.Nozzle assembly
G.Fuel line hose
H.Air Line Hose
F.