[Principle]
  The fuel is bumt at firstbox and the high temperature is produced. The quantity of heat will conduct to air to be heated through heat exchange device. Through heat exchange, the temperature of air is dropped to less than 250'C and the air will be discharged. The air to be heated is sent to hot air furnace through distribution blow fan. After absorbed heat to the rated value, the air will be sent from the vent of hot air, When the temperature of hot air reaches the rated upper limit, the burner can stop or turn to small fire autornatically When the temperature of hot air drops to the F8ted low limit, the burner can burn or turn to big fire automatically.

[Technical parameters]

Type	Combustion device type	Oil combustion（kg/h）	Heat supply capacity（104kcal/h）	Overall dimensionLxWxH（mm）	Hot air holeLxW（mm）	total weight（kg）
RLY1	QYC5	1.3-1.6	1	1000x1000x1600	Φ200	150
RLY4	QYC5	5-6.5	4	1700x1000x1600	140x160	1100
RLY10	Y1	13-16	10	2100x1300x1600	180x200	1970
RLY20	YL3	26-32	20	2800x1400x1700	200x250	2260
RLY30	YL3	39-48	30	3400x1500x1800	250x300	3160
RLY40	YL3	52-64	40	4020x1700x1900	300x400	4750
RLY60	YL7	78-96	60	4800x1900x2100	400x500	5650
RLY100	YL8	130-160	100	5400x2100x2300	550x650	6550
RLY200	YB10	260-320	200	6000x2500x2400	750x900	7980
RLY360	YB11	468-720	360	7200x2900x2600	900x1200	9860