Bard WG5S1, WG4S1, WG3S1 warranty Natural Gas Derate Capacities, Propane Lp Derate Capacities

Important Information Concerning Altitude Impact on Heating Input Ratings

Heating input, and thus heating output, decreases with altitude. No orifice change is required up to 6,000 feet elevation and derate occurs naturally due to altitude impact. Natural gas models may require orifice change based on BTU content of gas. See Natural Gas Orifice and Altitude Tables on next page for details. For Propane Gas see the Propane Gas Conversion Table below.

Above 6,000 feet elevation orifice changes are required, and capacity reductions are a function of altitude impact and orifice change. Pressure switch change is required above 6,000 feet elevation. For Natural Gas see the Orifice and Altitude Tables on next page. For Propane Gas see the Propane Gas Conversion Table below.

NATURAL GAS DERATE CAPACITIES

WG Rated	Sea
Input	Level	1000	2000	3000	4000	5000	6000	7000	8000	9000	10,000
45,000	45,000	43,560	42,120	40,680	39,600	38,880	37,980	37,440	36,720	36,270	35,640
50,000	50,000	48,400	46,800	45,200	44,000	43,200	42,200	41,600	40,800	40,300	39,600
67,500	67,500	65,340	63,180	61,020	59,400	58,320	56,970	56,160	55,080	54,405	53,460
75,000	75,000	72,600	70,200	67,800	66,000	64,800	63,300	62,400	61,200	60,450	59,400
90,000	90,000	87,120	84,240	81,360	79,200	77,760	75,960	74,880	73,440	72,540	71,280
100,000	100,000	96,800	93,600	90,400	88,000	86,400	84,400	83,200	81,600	80,600	79,200
112,500	112,500	108,900	105,300	101,700	99,000	97,200	94,950	93,600	91,800	90,675	89,100
125,000	125,000	121,000	117,000	113,000	110,000	108,000	105,500	104,000	102,000	100,750	99,000

PROPANE (LP) DERATE CAPACITIES

WG Rated	Sea
Input	Level	1000	2000	3000	4000	5000	6000	7000	8000	9000	10,000
40,500	40,500	39,852	39,528	39,204	38,556	38,232	37,584	36,612	35,640	34,344	32,724
45,000	45,000	44,280	43,920	43,560	42,840	42,480	41,760	40,680	39,600	38,160	36,360
60,750	60,750	59,778	59,292	58,806	57,834	57,348	56,376	54,918	53,460	51,516	49,086
67,500	67,500	66,420	65,880	65,340	64,260	63,720	62,640	61,020	59,400	57,240	54,540
75,000	75,000	73,800	73,200	72,600	71,400	70,800	69,600	67,800	66,000	63,600	60,600
81,000	81,000	79,704	79,056	78,408	77,112	76,464	75,168	73,224	71,280	68,688	65,448
90,000	90,000	88,560	87,840	87,120	85,680	84,960	83,520	81,360	79,200	76,320	72,720
100,000	100,000	98,400	97,600	96,800	95,200	94,400	92,800	90,400	88,000	84,800	80,800
112,500	112,500	110,700	109,800	108,900	107,100	106,200	104,400	101,700	99,000	95,400	90,900
125,000	125,000	123,000	122,000	121,000	119,000	118,000	116,000	113,000	110,000	106,000	101,000

Gas Pressure Inches W.C.

Minimum permissible gas supply pressure for purpose of input adjustment:	Natural 4.5	LP 11.0
Maximum permissible gas supply pressure for purpose of input adjustment:	Natural 11.0	LP 13.0
Manifold Pressure:	Natural 3.5	LP 10.0

Propane Gas Conversion Kits -- Fits All WG-Series Models

PROPANE (LP) GAS -- Use Gas Conversion Kits As Indicated

MODELS	Propane Gas Conversion Kit		Use WGCK-1	Use WGCK-2
	Factory	Gas	Up to 6000 Feet	6001 to 8000 Feet	8001 to 10,000 Feet
		Heat		Requires Pressure	Requires Pressure
	Standard
		Value		Switch Change and	Switch Change and
	Input
		BTU/Cu. Ft.	Install Orifice	Orifice as Shown	Orifice as Shown
WG3S
	25,000 BTU	2500	1.50	1.50	1.45
WG4S	Per Burner	Pressure Switch	Standard (.55)	Pressure Switch (.42) Included in Conversion Kit
WG5S	Optional	Gas	Up to 6000 Feet	6001 to 8000 Feet	8001 to 10,000 Feet
	10% Field	Heat		Requires Pressure	Requires Pressure
	Converted	Value		Switch Change and	Switch Change and
	Derate	BTU/Cu. Ft.	Install Orifice	Orifice as Shown	Orifice as Shown
	22,500 - 22,650	2500	1.45	1.45	1.40
	BTU
		Pressure Switch	Standard (.55)	Pressure Switch (.42) Included in Conversion Kit
	Per Burner

All orifice sizes shown are millimeters (mm).

Form No.	S3396-1112
Supersedes	S3396-212
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