PRODUCT IDENTIFICATION UNPACKING THEORY OF OPERATION
NATURAL GAS SUPPLY VENTILATION
3
PRODUCT IDENTIFICATION |
| Combustion |
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| Chamber | Ignitor | |||||
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Hot Air Outlet |
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| Fan |
(Front) | Upper Shell |
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| Motor |
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| Handle | Clean |
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| Heated |
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| Air Out |
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| Fan |
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| Guard |
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| Nozzle |
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Lower Shell |
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| Power |
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| DSI |
| On/Off Cord |
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| Switch | |
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| Internal | Solenoid Valve |
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| Power Cord |
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| Regulator | |
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| Air For Combustion | Fuel | ||
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| On/Off |
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| And Heating |
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| Figure 2 - Cross Section Operational View | ||||
| Switch |
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Inlet Connector
Figure 1 - 150,000 Btu/Hr Model
NATURAL GAS SUPPLY
UNPACKING
1.Remove all packing items applied to heater for shipment. Keep plastic cover cap (attached to inlet connector) for storage.
2.Remove all items from carton.
3.Check all items for shipping damage. If heater is damaged, promptly inform dealer where you bought heater.
4.Hose not included. User must supply hose or flexible connector.
THEORY OF OPERATION
The Fuel System: The gas supply attaches to the heater by a minimum 3/4 inch i.d. hose or flexible connector. User must supply hose or flexible connector. The length should be no more than 10 feet long. The natural gas moves through the solenoid valve and the internal regulator and out the nozzle.
The Air System: The motor turns the fan. The fan pushes air into and around the combustion chamber. This air is heated and provides a stream of clean, hot air.
The Ignition System: The direct spark ignitor (DSI) sends voltage to the ignitor. The ignitor ignites the fuel and air mixture.
The Safety Control System: This system causes the heater to shut down if the flame goes out.
The user must furnish the natural gas supply and the connections to the heater.
Regulate the natural gas supply down from a minimum 5 inches water column to a maximum of 1/2 psi. The natural gas supply capacity should be able to supply a minimum of 150 cubic feet of gas at pressure for each heater connected to the system.
Consult your natural gas supplier for proper sizing of the natural gas supply lines.
Follow all local ordinances and codes. In the absence of local ordinances and codes, refer to the National Fuel Gas Code Hand- book, NFPA54/ANSI Z223.1 and the Natural gas Installation Code, CAN/CGA B149.1.
VENTILATION
WARNING: Follow the minimum fresh, outside air ventilation requirements. If proper fresh, outside air ventilation is not provided, carbon monoxide poison- ing can occur. Provide proper fresh, outside air ven- tilation before running heater.
Provide a fresh air opening of at least three square feet for each 100,000 Btu/Hr rating. Provide extra fresh air if more heaters are being used.
For more information, visit www.desatech.com