Carrier Performance 48VR-A Manual de instrucciones descargar pdf (Pagina 18)

Table 4 – Natural Gas Orifice Sizes and Manifold Pressure

208/230VAC Models

Nameplate

Input,

High Stage

(Btu/hr)

ALTITUDE OF INSTALLATION (FT. [m] ABOVE SEA LEVEL) U.S.A.*

0 to 2000

[0 to 610]

2001 to

3000*

[610 to 914]

3001 to 4000

[915 to 1219]

4001 to 5000

[1220 to 1524]

5001 to 6000

[1524 to 1829]

40000

Orifice No. (Qty) 44 (2) 45 (2)† 48 (2)† 48 (2)† 48 (2)†

Manifold Press. High / Low (in. W.C.) 3.2 /1.4 3.2 /1.4 3.8 /1.6 3.5 /1.5 3.2 /1.4

60000

Orifice No. (Qty) 44 (3) 45 (3)† 48 (3)† 48 (3)† 48 (3)†

Manifold Press. High / Low (in. W.C.) 3.2 /1.4 3.2 /1.4 3.8 /1.6 3.5 /1.5 3.2 /1.4

90000

Orifice No. (Qty) 38 (3) 41 (3)† 41 (3)† 42 (3)† 42 (3)†

Manifold Press. High / Low (in. W.C.) 3.6 /1.6 3.8 /1.6 3.4 /1.5 3.4 /1.5 3.2 /1.4

115000

Orifice No. (Qty) 33 (3) 36 (3)† 36 (3)† 36 (3)† 38 (3)†

Manifold Press. High / Low (in. W.C.) 3.8 /1.7 3.8 /1.7 3.6 /1.6 3.3 /1.4 3.6 /1.5

130000

Orifice No. (Qty) 31 (3) 31 (3) 33 (3)† 33 (3)† 34 (3)†

Manifold Press. High / Low (in. W.C.) 3.8 /1.7 3.2 /1.4 3.7 /1.6 3.4 /1.4 3.3 /1.4

*In the U.S.A., the input rating for altitudes above 2000 ft (610m) must be reduced by 4% for each 1000 ft (305 m) above sea level.

In Canada, the input rating for altitudes from 2001 to 4500 ft (611 to 1372 m) above sea level must be derated by 10% by an authorized gas conversion stationor

dealer.

For Canadian Installations from 2000 to 4500 ft, use U.S.A. column 2001 to 3000 ft (610 to 914 m).

† Orifices available through your distributor.

NOTE: Orifice sizes and manifold pressure settings are based on natural gas with a heating value of 1025 Btu/ft

and a specific gravity of .6.

Table 5 – Heating Inputs 208/230 VAC Models

HEATING INPUT

(BTUH)

NUMBER

GAS SUPPLY PRESSURE (IN. W.C.)

MANIFOLD PRESSURE

NUMBER OF

ORIFICES

Natural{ Propane*{

MANIFOLD

PRES

SURE

(IN. W.C.)

ORIFICES

Min Max Min Max Natural{ Propane*†

40,000 2 4.0 13.0 11.0 13.0 3.23.8 10.0

60,000 2 4.0 13.0 11.0 13.0 3.23.8 10.0

90,000 3 4.0 13.0 11.0 13.0 3.23.8 10.0

115,000 3 4.0 13.0 11.0 13.0 3.23.8 10.0

130,000 3 4.0 13.0 11.0 13.0 3.23.8 10.0

*When a unit is converted to propane, different size orifices must be used. See separate, natural ---to ---propane conversion kit instructions.

{Based on altitudes from sea level to 2000 ft (610 m) above sea l evel. In U.S.A. for altitudes above 2000 ft (610 m), reduce input rating 4 percent for each addi-

tional 1000 ft (305 m) above sea level. In Canada, from 2000 ft (610 m) above sea level to 4500 ft (1372 m) above sea level, derate the unit 10 percent.

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