JLA D40, Руководство по установке

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Note
A water column (W.C.) test pressure of 3.5 inches
(8.7 mb) for natural gas and 10.5 inches (26.1
mb) for liquid propane (L.P.) dryers is required at the gas
valve pressure tap of each dryer for proper and safe
operation.
A 1/8” N.P.T. plugged tap, accessible for a test gauge
connection, must be installed in the main gas supply line
immediately upstream of each dryer.
Important
Pipe joint compounds that resist the action of
natural gas and L.P. gas must be used.
Test all connections for leaks by brushing on a soapy water
solution (liquid detergent works well).
Warning
Never test for leaks with a flame!!!
All components/materials must conform to National Fuel Gas
Code Specifications ANSI Z223.1-LATEST EDITION, or in
Canada, CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA-
B149.2-M91 (L.P. Gas) or LATEST EDITION (for General
Installation and Gas Plumbing), as well as local codes and
ordinances and must be done by a qualified professional. It
is important that gas pressure regulators meet applicable
pressure requirements, and that gas meters be rated for the
total amount of all the appliance Btus being supplied.
Important
The dryer and its individual shutoff valve must be
disconnected from the gas supply piping system
during any pressure testing of that system at test pressures
in excess of 1/2 psig (3.5 kPa).
Note
The dryer must be isolated from the gas supply
piping system by closing its individual manual
shutoff valve during any pressure test of the gas supply
system at test pressures equal to or less than 1/2 psig (3.5
kPa).
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Piping Connections
All components/materials must conform to National Fuel Gas
Code Specifications ANSI Z223.1-LATEST EDITION, or in
Canada, CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA-
B149.2-M91 (Liquid Propane [L.P.] Gas) or LATEST EDITION
(for General Installation and Gas Plumbing), as well as local
codes and ordinances and must be done by a qualified
professional. It is important that gas pressure regulators
meet applicable pressure requirements, and that gas meters
be rated for the total amount of all the appliance Btus being
supplied.
The dryer is provided with a 1/2” N.P.T. inlet pipe connection
extending out the back area of the burner box. The minimum
pipe size (supply line) to the dryer is 1/2” diameter. For ease
in servicing, the gas supply line of each dryer must have its
own shutoff valve.
The size of the main gas supply line (header) will vary
depending on the distance this line travels from the gas meter
or, in the case of L.P. gas, the supply tank, other gas-operated
appliances on the same line, etc. Specific information
regarding supply line size should be determined by the gas
supplier.
Note
Undersized gas supply piping can create a low or
inconsistent pressure, which will result in erratic
operation of the burner ignition system.
Consistent gas pressure is essential at all gas connections.
It is recommended that a 3/4-inch (19.05 mm) pipe gas loop
be installed in the supply line servicing a bank of dryers. An
in-line pressure regulator must be installed in the gas supply
line (header) if the (natural) gas pressure exceeds 12.0
inches (29.9 mb) of water column (W.C.) pressure. (Refer to
the illustrations above.)