Lanair DHI 300 - Manual (Page 22)

Section 8 - Electrical Connections
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Fuel Supply Pump Electrical Installation
1. All wiring must comply with the National Electrical Code, State and Local Ordinances,
and be wired by a qualified electrician.
2. The electrical conductors to the fuel pump motor MUST be stranded 14 GA minimum.
3. The electrical service connections for the fuel pump motor are made in the electrical
junction box on the side of the heater.
4. The pump motor MUST have a safety equipment ground from the main electrical serv-
ice, stranded 12 GA minimum.
5. The electrical conductors from the electrical junction box to the pump motor must be
within approved conduit.
6. Keep all electrical conductors and conduit away from the chimney connector as well as
any other hot surfaces. Refer to Figure 15 Wiring Diagram for color code, etc. Keep the
power off until the heater is ready to be started. Refer to Section 13 Start Up Procedure.
Room Thermostat Installation
1. All wiring must comply with the National Electrical Code, State and Local Ordinances,
and be wired by a qualified electrician.
2. Install the room thermostat in accordance with the directions furnished with the ther-
mostat.
3. Use two conductor thermostat wire for the connection of the thermostat to the T.T. ter-
minals of the oil primary control that is mounted on top of the burners electrical box.
4. Mount the thermostat 5 feet above the floor on an inside wall away from the heater’s
warm air path.
5. The electrical current for thermostat is 24 V, and is provided by the oil primary control.
6. Keep the thermostat wire away from the chimney connector, or any other hot surfaces.
Refer to Section 2 for a typical thermostat installation.
CAUTION: HAZARD OF ELECTRICAL SHOCK!
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Section 12 - Flame Adjustment
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Problem: Too small a flame, similar to a blowtorch.
1. Too much atomizing air pressure.
2. Too much combustion air pressure.
3. Not enough fuel pressure.
Solutions:
1. Correct fuel pressure setting.
2. Flame tips reach 3/4 of the way into the chamber.
3. Flame has slightly yellow/orange tips.
4. No black smoke coming from the chimney.
5. Ash inside the chamber is white to off white in color.
Flame is full (Fig. 13).
• Bright yellow in color.
• Flame extends 3/4 into the chamber.
• Flame is not impinging on the chamber walls.
If you need assistance with flame adjustment, please call Lanair's Parts and Service
Department.
CHECK FLAME DAILY (see page 30). ADJUST ACCORDINGLY
!
DO NOT OVER FIRE YOUR HEATER. IMMEDIATELY ADJUST
THE BURNER TO THE PROPER FLAME LENGTH TO PREVENT
DAMAGE TO YOUR HEATER.
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