York DFAH Notice Special Requirements, The Effect Of Elevation On Oil Burner Firing, UIM-B-1105

107272-UIM-B-1105

NOTICE SPECIAL REQUIREMENTS

This equipment must be installed, adjusted, and started only by a qualified service technician, an individual or agency, licensed and experienced with all codes and ordinances, who is responsible for the installation and adjustment of the equipment. The installation must comply with all local codes and ordinances and with the National Fire Protection Standard for Liquid Fuel Equipment, NFPA 31 (or in Canada the installation must comply with CSA B139).

This pump must be used with a control system that provides a valve on delay (pre-purge).

This furnace is designed to operate on #1 FUEL-OIL or #2 FUEL- OIL ONLY. Do Not burn any other fuel in this furnace. Burning any fuel except #1 FUEL-OIL or #2 FUEL-OIL in this furnace can cause premature heat exchanger burnout, high levels of carbon monox- ide, excessive sooting, a fire hazard, personal injury, property dam- age, and/or death.

In Canada, the furnace is designed to operate on #1 STOVE OIL or

#2 FURNACE OIL ONLY.

THE EFFECT OF ELEVATION ON OIL BURNER FIRING

The elevation of the installation of a modern high-speed flame retention oil burner affects the performance of the burner. Allowance for elevation must be taken into consideration when choosing an oil burner and oper- ating it above 2000 ft. (610m).

It is especially important in high elevation installations to adjust air set- tings to match the burner nozzle firing rate. As elevation increases above sea level, the ambient air contains less oxygen. Because there is less available oxygen per cubic foot of air, the burner must deliver a greater volume flow (cfm) of air to provide the proper amount of oxygen for the amount of oil being burned. This is the reason that an increase in the burner air setting may be required.

It is also important in high elevation installations to consider the maxi- mum firing rate of the burner, so that the heat input as required by the application is maintained. Regardless of elevation, the oil burner has a maximum volume flow of air that it can deliver. As a result, the maxi- mum firing rate of the oil burner decreases as the elevation increases, because the combustion air contains less oxygen. An increase in the size of a fixed-type retention head, or even the use of an oil burner with a higher maximum firing rate may be necessary.

The effect of elevation up to 2000 ft. (610 m) is minimal, so no re-rate is necessary up to 2000 ft. (610 m) elevation. Above 2000 ft. (610 m), for every 1000 ft. (305 m) above sea level (including the first 2000 ft. (610 m), there is a 1.84% rate reduction of the burner. To assist you, we have included the following chart and some examples: Refer to Table 7.

The pressure regulator on the fuel pump must not be adjusted in excess of 100 PSIG (689 kPa).

Pressures exceeding 100 PSIG (689 kPa) may cause an overheat- ing condition which can lead to premature heat exchanger failure, resulting in a fire or explosion, or cause damage to the furnace of some of its components that will result in property damage and loss of life. Refer to Figure 16 for Pressure Regulator Location.

TABLE 7: Burner Rating at Elevation Above Sea Level, gph (l/m)

Elevation			Nozzle Size
(Above Sea Level)		0.50	1.892706	0.65	2.460518
ft	m	gph	l/h	gph	l/h
500	152	0.50	1.89	0.65	2.46
1,000	305	0.50	1.89	0.65	2.46
1,500	457	0.50	1.89	0.65	2.46
2,000	610	0.50	1.89	0.65	2.46
2,500	762	0.49	1.86	0.65	2.46
3,000	914	0.48	1.82	0.64	2.42
3,500	1,067	0.48	1.82	0.64	2.42
4,000	1,219	0.47	1.79	0.63	2.37
4,500	1,372	0.47	1.79	0.63	2.37
5,000	1,527	0.46	1.76	0.61	2.33
5,500	1,676	0.46	1.76	0.61	2.33
6,000	1,829	0.46	1.72	0.60	2.28
6,500	1,981	0.46	1.72	0.60	2.28
7,000	2,134	0.45	1.69	0.59	2.24
7,500	2,286	0.45	1.69	0.59	2.24
8,000	2,438	0.44	1.66	0.58	2.20
9,000	2,743	0.43	1.63	0.57	2.16
10,000	3,048	0.42	1.60	0.56	2.12
Note: All	examples are for 7000 ft. elevation.
1.84% x 7 (for 7000 ft.) = 12.9%			→ 100% - 12.9% = 87.1%

ft = feet

m = meters

gph = gallons per hour l/h = liters per hour

EXAMPLE 1:

Re-Rating of the Maximum Firing Rate for Burners @ 7000 ft.

Burner	Maximum Firing		Elevation	=	Adjusted
Model	Rate of Burner	X Re-rate Factor			Maximum
	@ Sea Level		@ 7000 ft.		Firing Rate
AFG	3.00 gph (11.4 L/h)	X	87.1%	= 2.61 gph (9.83		Lh)
AF	3.00 gph (11.4 L/h)	X	87.1%	=	2.61 gph (9.83	Lh)

.
Nozzle Port		By Pass
3/16 Flare		Solenoid		Inlet Port
Fittting		Valve	Cordset	1/4 NPTF	Pressure
					Adjustment
					Screw
Beckett
CLEANCUT	INLET
USE ONLY WITH
VALVE ON DELAY
A2EA-6520
4 GPH 100-150 PSI 3450 RPM
NO. 2 & LIGHTER FUEL
3 GPH 150-200 PSI 3450 RPM
NO. 2 FUEL			Bleed &
INLET	BY-PASS
Made by Suntec
Exclusively for Beckett
			Gauge Port
Inlet Port		Return Port
		Install 1/16” by Pass Pipe
1/4 NPTF
		Plug For Two-Pipe System Only
(0.64 cm)
		(Use 5/32” Allen Wrench)

FIGURE 16: Oil Pump

INSTALLATION AND CHECKING OF OIL PIPING

Location and installation of oil tanks and oil piping must comply with local codes and regulations. In absence of such codes, follow NFPA 31: Standard Floor Installation of Oil Burner Equipment.

12 Unitary Products Group