Upper Shell Removal; Fuel Filter; Spark Plug; Pump Pressure Adjustment - Master B 35 CED Owner's Manual

SERV I CE PROCEDU RES
4
GB
SERV I CE PROCEDU RES
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.
(see fi gure 7 and 8)
A. Upper shell, B. Fan guard
(see fi gure 9)
A. Fuel Filter, B. Side cover, C. Fuel line.
(see fi gure 10)
A. Fuel Filter, Bushing, and Lower Fuel Line, B.Upper fuel line,
C. Side cover.

SPARK PLUG -

(35,000 Btu/Hr Model)-
1.Remove upper shell.
2.Remove fan (see page 5).
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.
15.Attach fuel and air line hoses to nozzle assembly.
16.Replace fan (see page 5).
17.Replace fan guard and upper shell.
(see fi gure 11)
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
(see fi gure 12)
A. Bend here to adjust gap.
(see fi gure 13)
A. Burner strap.
SPARK PLUG -
(70/100/150,000 Btu/Hr Models)-
1. Remove upper shell (see page 4).
2. Remove fan (see page 5).
3. Remove spark plug wire from spark plug.
4. Remove spark plug from burner head using 13/16" open-end
wrench.
5. Clean and regap spark plug electrodes as follows:
70/100,000 Btu/Hr Models: 1.9 mm
150,000 Btu/Hr Model: 2.8 mm
6. Install spark plug in burner head.
7. Attach spark plug wire to spark plug.
8. Replace fan (see page 5).
9. Replace fan guard and upper shell.
(see fi gure 14)
A.Burner head, B.Spark plug wire, C.Spark plug
(see fi gure 15)
A.Bend here to adjust gap, B.Gap
AIR OUTPUT, AIR INTAKE, AND LINT FILTERS
1. Remove upper shell (see page 4).
2. Remove fi lter end cover screws using 5/16" nut-driver.
3. Remove fi lter end cover.
4. Replace air output and lint fi lters.
5. Wash or replace air intake fi lter (see Preventative Maintenance
Schedule, page 3).
6. Replace fi lter end cover.
7. Replace fan guard and upper shell.
IMPORTANT: Do not oil fi lters.

PUMP PRESSURE ADJUSTMENT

1. Remove pressure gauge plug from fi lterend cover.
2. Install accessory pressure gauge (part number 4109.427).
3. Start heater (see Operation, page 2).Allow motor to reach full
speed.
4. Adjust pressure. Turn relief valve to right to increase
pressure. Turn relief valve to left to decrease pressure. See
specifi cations below for correct pressure for each model.
5. Remove pressure gauge. Replace pressure gauge plug in
fi lter end cover.
(see fi gure 16 and 17)
A.Air Intake Filter, B.Filter end cover, C.fan guard, D.Air output
fi lter, E.Lint Filter.
Model Pump pressure (Bar/PSI)
35.000 Btu/Hr 0,207 / 3
70.000 Btu/Hr 0,365 / 5,3
100.000 Btu/Hr 0,275 / 4
150.000 Btu/Hr 0,337 / 4,9
(see fi gure 18)
A. Pressure gauge Plug, B. relief Valve, C. Plastic cap