Lanair DHI 300 - Manual (Page 45)

Section 1 - General Specifications & Hazards
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8
OPTIONAL J-PUMP
No. Description
1 Pump Platform
2 Pump Motor
3 Pump Guard
4 Pump
5 Pressure Gauge port
6 Easy Flow Bleed Valve
7 1/4" NPT Inlet (1/2" J Pump)
8 1/8" NPT Outlet (1/4" J Pump)
9 Pump coupler
Pump Assembly-
Performance Ratings
Voltage . . . . . . . . . . . . . . . . . . . . . . 115 vac
Cycles . . . . . . . . . . . . . . . . . . . . . . . . . . 60 hz
Weight . . . . . . . . . . . . . . . . . . . . . . . . . 24 lbs
Pump Motor . . . . . . . . . . . . . . . . . . 5 amps
7
4
3
2
1
5
8
7
8
6
6
Section 14 - Troubleshooting
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• Install a jumper wire between the two F-F
terminals.
• Push reset button for 2 seconds.
• Turn room thermostat up so that it calls for
heat.
• Disable the air operated fuel valve.
• To activate the oil primary momentarily dis
connect one end of the jumper wire on the
F-F terminals. The burner will attempt to fire.
IMPORTANT remove the jumper wire when
testing is complete, and replace the cad cell
wires. Do not run the heater with the cad cell
wires disconnected.
Disabling the air operated fuel valve.
Note: Most trouble shooting tests will require the air operated fuel valve to be disabled, to
do this:
• Adjust the heater air filter/regulator to -0- PSI.
Install jumper wire
Vacuum Gauge reading hints:
No reading 0-1 HG
• Pump not operating.
• Pump air locked and needs priming. Refer to section 10.
• Vacuum leak:
 Pump shaft seal  Pump cover gasket
 Suction strainer gaskets  Low fuel level in tank
 Pipe connections suction side  Strainer in pump cover
Low to normal reading, 1-6 inches HG.
• Pump operating properly. • Fuel being used has a low viscosity.
• Fuel oil is being used. • Fuel is at room temperature (warm).
• High level of gasoline in the fuel (use approved fuels only).
High reading, 7 inches of HG, or more.
• Fuel being used has to high of a viscosity. • Suction line strainer dirty or plugged.
• Fuel is too cold.
• Check valve installed wrong or stuck.
• Fuel contains gear lubes (use approved fuels only).
Reading fluctuates (jumps).
• Vacuum leaks in the suction side of the piping to the pump.
• Low fuel level in the tank.
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