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105850-01D
10
SERVICE PROCEDURES
Continued
SERVICE PROCEDURES
Figure 11 - Adjusting Pump Pressure
Figure 13 - Location of Screw on Flange Clamp
Hex Screw
On Flange
Clamp
FUEL LINES
(Procedure for tightening fuel lines)
1. Remove upper shell (see Upper Shell Removal, page 8).
2. Use an adjustable wrench as a backup on fittings.
3. Use 7/16" wrench and tighten fuel lines at solenoid valve, pump,
and fuel filter canister (if equipped) (see Figure 15, page 11).
p
s
i
Pressure
Gauge
Fuel Pump Port
Marked “GAUGE”
Fuel Pump Port
Marked “PRESS ADJ”
Model Pump Pressure
350,000 Btu/Hr 100 PSI
600,000 Btu/Hr 110 PSI
psi
PUMP PRESSURE ADJUSTMENT FOR HEATERS
WITH FUEL FILTER INTERNAL TO PUMP
1. Remove pressure gauge plug from fuel pump port marked
“GAUGE.”
2. Install accessory pressure gauge (part number 130-24132) to
fuel pump port marked “GAUGE” (see Figure 12). Do not use
bleeder valve port to check the pressure. The bleeder valve
port contains pressure higher than operating pressure. Setting
pump pressure with gauge in the bleeder valve port results in
wrong operating pressure.
3. Start heater (see Operation, page 4). Allow motor to reach full speed.
Pressure
Gauge
Fuel Pump Port
Marked “GAUGE”
Pressure
Adjustment
Port
Figure 14 - Turning Fan with Hand
Figure 12 - Adjusting Pump Pressure
5. Stop heater (see page 5).
6. Remove pressure gauge. Replace pressure gauge plug in fuel
pump port marked “GAUGE.”
4. Adjust pressure. Use small flat blade screwdriver to turn slot-
ted screw at fuel pump port at top right side of pump. Turn
screw clockwise to increase pressure. Turn screw counterclock-
wise to decrease pressure. See specifications in Figure 12 for
correct pressure for each model.
5. Stop heater (see page 5).
6. Remove pressure gauge. Replace pressure gauge plug in fuel
pump port marked “GAUGE.”
PUMP
(Procedure if Pump is Binding)
1. Remove upper shell (see Upper Shell Removal, page 8).
2. Loosen hex screw on flange clamp at rear of motor with 5/16"
nut-driver (see Figure 13).
3. Turn fan with hand (see Figure 14).
4. If fan turns freely, tighten screw on flange clamp.
5. If fan does not turn freely, replace pump.
6. Replace upper shell.
Model Pump Pressure
350,000 Btu/Hr 100 PSI
600,000 Btu/Hr 110 PSI