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113062-17 Maytag Co. 13
L.P. Gas
Dryers made for use with L.P. 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 in wc. There is no regulator or regulation
provided in an L.P. dryer. The water column pressure must
be regulated at the source (L.P. tank) or an external regulator
must be added to each dryer.
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 (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 Btu being supplied.
The dryer is provided with a 3/4” N.P.T. inlet pipe connection
at the upper right hand corner (when viewed from the rear) of
each dryer. It is recommended that a gas shutoff valve be
provided to the gas supply line of each dryer for ease of
servicing.
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), the number of
tees, other gas-operated appliances on the supply 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” pipe loop be installed in the
supply line servicing the bank of dryers. An in-line pressure
regulator must be installed in the gas supply line (header) if
(natural) gas line pressure exceeds 12.0 in wc pressure.
(Refer to the illustration below for details.)
IMPORTANT: Water column pressure of 3.5 inches for
natural gas dryers and 10.5 inches for L.P. gas 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.