Carrier 58HDV Changing Orifices for High Altitude, Electrical SHOCK, Fire or Explosion Hazard

58HDV

Table 7	NATURAL GAS MANIFOLD PRESSURE (in wc) 20,000 BTU per burner
							MEAN ELEVATION ABOVE SEA LEVEL ft(m)
HEATING	0 to 2000			2001 to 3000{			3001 to 4000			4001 to 5000			5001 to 6000			6001 to 7000			7001 to 8000
VALUE at	(0 to 609.6)			(609.9 to 914.4){			(914.7 to 1219.2)			(1219.5 to 1524)			(1524.3 to 1828.8)			(1829.1 to 2133.6)			(2133.9 to 2438.4)
ALTITUDE
	Orifice	Manifold		Orifice	Manifold		Orifice	Manifold		Orifice	Manifold		Orifice	Manifold		Orifice	Manifold		Orifice	Manifold
BTU/CU.	No.	Pressure		No.	Pressure		No.	Pressure		No.	Pressure		No.	Pressure		No.	Pressure		No.	Pressure
FT.
		HI	LO		HI	LO		HI	LO		HI	LO		HI	LO		HI	LO		HI	LO
700	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	44	3.7	1.8
725	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	44	3.7	1.8	44	3.4	1.7
750	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	44	3.5	1.7	44	3.2	1.6
775	----	----	----	----	----	----	----	----	----	----	----	----	44	3.5	1.7	44	3.2	1.6	46	3.8	1.9
800	----	----	----	----	----	----	----	----	----	44	3.6	1.8	44	3.3	1.6	45	3.7	1.8	46	3.6	1.7
825	----	----	----	----	----	----	44	3.7	1.8	44	3.4	1.7	45	3.8	1.8	46	3.6	1.8	47	3.8	1.9
850	----	----	----	----	----	----	44	3.5	1.7	44	3.2	1.6	46	3.7	1.8	46	3.4	1.7	47	3.6	1.7
875	----	----	----	44	3.5	1.7	44	3.3	1.6	46	3.8	1.9	46	3.5	1.7	47	3.7	1.8	48	3.8	1.9
900	----	----	----	44	3.3	1.6	45	3.7	1.8	46	3.6	1.8	47	3.8	1.8	47	3.5	1.7	48	3.6	1.8
925	44	3.7	1.8	44	3.2	1.5	46	3.7	1.8	46	3.4	1.7	47	3.6	1.8	48	3.7	1.8	48	3.4	1.7
950	44	3.5	1.7	45	3.6	1.8	46	3.5	1.7	47	3.7	1.8	47	3.4	1.7	48	3.5	1.7	49	3.8	1.9
975	44	3.3	1.6	46	3.6	1.8	47	3.8	1.9	47	3.5	1.7	48	3.7	1.8	48	3.4	1.6	49	3.6	1.8
1000	44	3.2	1.6	46	3.4	1.7	47	3.6	1.8	48	3.8	1.8	48	3.5	1.7	49	3.8	1.8	49	3.4	1.7
1050	46	3.6	1.8	47	3.5	1.7	48	3.7	1.8	48	3.4	1.7	49	3.7	1.8	----	----	----	----	----	----
1100	47	3.8	1.8	48	3.7	1.8	48	3.4	1.7	49	3.7	1.8	----	----	----	----	----	----	----	----	----
Conversion:	1 in wc = 249 Pa										Bold- indicates factory orifice size.

NOTE: Propane data is based on 1.53 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI Z223.1-2006/NFPA 54-2006 or National Standard of Canada, Natural Gas and Propane Installation Code CSA B149.1-05.

In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design-certified by CSA.

{In Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (609.6 to 1371.6m) above sea level. Use the 2001 to 3000 (609.9 to 914.4m) column in Table 7 and Table 8.

Table 8

PROPANE GAS MANIFOLD PRESSURE (in wc) 20,000 BTU per burner

MEAN ELEVATION FEET ABOVE SEA LEVEL ft(m)

HEATING VALUE

0 to 2000

2001 to 3000{

3001 to 3999

4001 to 5000

5001 to 6000

6001 to 7000

7001 to 8000

at ALTITUDE

(0 to 609.6)

(609.9 to

(914.7 to

(1219.5 to 1524)

(1524.3 to

(1829.1 to

(2133.9 to

BTU/CU. FT.

914.4){

1219.2)

1828.8)

2133.6)

2438.4)

Hi

Lo

Hi

Lo

Hi

Lo

Hi

Lo

Hi

Lo

Hi

Lo

Hi

Lo

2500

10.0

4.9

8.9

4.4

8.4

4.1

10.0

4.9

10.0

4.9

10.0

4.9

10.0

4.9

Orifice Size

#55

#55

#55

#56

#56

#56

#56

Conversion: 1 in wc = 249 Pa

NOTE: Propane data is based on 1.53 specific gravity. For fuels with different specific gravity consult the National Fuel Gas Code ANSI

Z223.1-2006/NFPA 54-2006 or National Standard of Canada, Natural Gas and Propane Installation Code CSA B149.1-05.

In the USA, derating of these furnaces at 2% (Natural Gas) and 4% (Propane Gas) has been tested and design-certified by CSA.

{In Canada, the input rating must be derated 5% (Natural Gas) and 10% (Propane Gas) for altitudes of 2,000 to 4,500 (609.6 to 1371.6m) above sea level. Use the 2001 to 3000 (609.9 to 914.4m) column in Table 7 and Table 8.

The burner orifice part numbers are as follows:

Orifice	Part #		Orifice	Part #
41	333730--	701	42	333730--	702
43	333730--	703	44	333730--	704
45	333730--	705	46	333730--	709
47	333730--	710	48	333730--	711
49	333730--	712	54	333730--	706
55	333730--	707	56	333730--	708

Changing Orifices for High Altitude

!WARNING

ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal injury, death, and/or property damage.

Turn OFF electric power (at disconnect) and gas supply (at manual valve in gas line) when installing orifices. Installation of orifices requires a qualified service technician.

NOTE: Main burner orifices can be changed for high altitudes.

1.Disconnect gas line from gas valve.

2.Remove manifold from furnace.

3.Remove the orifices from the manifold and replace them with properly sized orifices.

4.Tighten orifices so it is seated and gas tight. (See Fig. 39.)

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