Goodman 209319576, Руководство по установке

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9
• Listed gas appliance connectors used in
accordance with the terms of their listing that are
completely in the same room as the equipment
In the preceding two methods the connector or tubing must
be protected from physical and thermal damage. Aluminum
alloy tubing and connectors must be coated to protect
against external corrosion when in contact with masonry,
plaster or insulation or are subject to repeated wettings by
liquids (water - not rain water, detergents or sewage).
Length of
Pipe in Feet 1/2 3/4 1 1 1/4 1 1/2
10 132 278 520 1050 1600
20 92 190 350 730 1100
30 73 152 285 590 980
40 63 130 245 500 760
50 56 115 215 440 670
60 50 105 195 400 610
70 46 96 180 370 560
80 43 90 170 350 530
90 40 84 160 320 490
100 38 79 150 305 460
Pressure = .50 PSIG or less and Pressure Drop of 0.3" W.C. (Based
on 0.60 Specific Gravity Gas)
Natural Gas Capacity of Pipe
in Cubic Feet of Gas Per Hour (CFH)
Nominal Black Pipe Size (inches)
BTUH Furnace Input
Heating Value of Gas (BTU/Cubic Foot)
CFH =
Proper Piping Practice
NOTE: The unit gas supply entrance is factory sealed with
plugs. Keep plugs in place until gas supply is ready to be
installed. Once ready, replace the plugs with the supplied
grommets and install gas supply line.
There will be air in the gas supply line after testing for leaks
on a new installation. Therefore, the air must be bled from
the line by loosening the ground joint union until pure gas
is expelled. Tighten union and wait for five minutes until all
gas has been dissipated in the air. Be certain there is no
open flame in the vicinity during air bleeding procedure.
The unit is placed in operation by closing the main electrical
disconnect switch for the unit.
Proper Piping Practice
Propane Gas Installations
IMPORTANT NOTE:
Propane gas conversion kits must be
installed to convert units to propane gas. Refer to the gas
piping section for the correct LP kit for conversion.
All propane gas equipment must conform to the safety
standards of the National Board of Fire Underwriters (See
NBFU Manual 58).
For satisfactory operation, propane gas supply pressure
must be within 9.7 - 10.3 inches W.C. at the manifold with
all gas appliances in operation. Maintaining proper gas
pressure depends on three main factors:
1. Vaporization rate, which depends on (a) temperature of
the liquid, and (b) wetted surface area of the container
or containers.
2. Proper pressure regulation.
3.
Pressure drop in lines between regulators, and
between second stage regulator and the appliance.
Pipe size required will depend on length of pipe run
and total load of all appliances.
Tanks and Piping
Complete information regarding tank sizing for vaporization,
recommended regulator settings and pipe sizing is
available from most regulator manufacturers and propane
gas suppliers.
Since propane gas will quickly dissolve white lead or most
standard commercial compounds, special pipe dope must
be used. Shellac base compounds resistant to the actions
of liquefied petroleum gases such as Gasolac®, Stalactic®,
Clyde’s® or John Crane® are satisfactory.
See following graphic for typical propane gas piping.