American Dryer Corp. ML-122, Руководство по установке

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TYPE OF GAS
Propane
Conversion
Kit
Part Number
Model
Btu/hr
Rating
kcal/hr
Rating
Natural Propane
Qty. D.M.S. * Part No. Qty. D.M.S. * Part No.
ML-122 415,000 104,580 3 #2 140839 3 #30 140819 882233
MLG-122DR 300,000 75,650 3 #12 140863 — — — —
Shaded areas are stated in metric equivalents
* Drill Measurement Size (D.M.S.) equivalents are as follows:
Natural Gas ................................. #2 = 0.2210” (5.6134 mm).
#12 = 0.1890” (4.800 mm).
Propane Gas ................................ #30 = 0.1285” (3.2639 mm).
3. 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 (Propane
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
Btu being supplied.
Installer within Australia – refer to AS/NZS5601.1 for guidance on gas supply pipe sizing required for this
appliance installation.
The dryer is provided with a 1-1/4” 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 1-1/4” 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 propane 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 1-inch (2.54 cm)
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.
1) Natural Gas
Regulation is controlled by the dryer’s gas valve’s internal regulator. Incoming supply pressure
must be consistent between a minimum of 6.0 inches (14.92 mb) and a maximum of 12.0 inches
(29.9 mb) water column (W.C.) pressure.
2) Propane Gas
Dryers made for use with propane gas have the gas valve’s internal pressure regulator blocked open
so that the gas pressure must be regulated upstream of the dryer. The pressure measured at each
gas valve pressure tap must be a consistent 10.5 inches (26.1 mb) water column. There is no
regulator or regulation provided in a propane dryer. The water column pressure must be regulated
at the source (propane tank) or an external regulator must be added to each dryer.