Piping/Connections, Instructions | American Dryer Corp MLG33

Piping/Connections

The dryer is provided with two 1/2” N.P.T. (3/8” B.S.P.T. for CE dryers) inlet pipe connections (1 for each tumbler) at the rear of the dryer. If a separate feed is provided for each tumbler from the main supply line (header), then a 1/2” (12.7 mm) line connection is sufficient. However, if the top and bottom tumbler connections are connected together, the supply from the header must be increased to 3/4-inch (19.05 mm). There should be a minimum 6-inch (15.24 cm) clearance between the back guard and the first bend in the gas piping for ease of servicing. It is recommended that a gas shutoff valve be provided to the gas supply line of each dryer for ease in 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, 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.

TYPICAL NATURAL GAS INSTALLATION

TYPICAL L.P. GAS INSTALLATION

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 13.0 in WC (32.34 mb) pressure.

A plugged tap, accessible for a pressure gauge connection, must be installed in the main gas supply line immediately upstream of the dryers.

Important

!Pipe joint compounds that resist the action of natural, L.P., and butane gases 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!!!

Converting from One Family

of Gas to Another ______________________

Warning (CE Dryers)

!This appliance must only be operated with the gas type indicated on the dryer’s data plate. If the

appliance is converted (gas type changed), a data plate amendment must be obtained from Maytag Co. (dryer’s serial number is required to purchase a conversion kit).

Important

!Any burner changes or conversions must be made by a qualified professional.

The dryers manufactured for Belgium, Luxemburg, Greece, Estonia, Slovak Republic, Iceland, Malta, Poland and Cyprus cannot be converted from one family of gas to another.

Conversion from Natural Gas to Propane or Butane Gas

The following conversion allows the dryer to be operated with either propane gas or butane gas (regulated or unregulated). The use of gas valve kit (P/N 140414) disables the internal regulator of the gas valve. Therefore, the gas supply is ungoverned and an external regulator must be provided at the source of the supply (example L.P. tank) or the gas supply line to the dryer.

Parts Required for Conversion:

Description	P/N	Qty
Unregulated Gas Conversion Kit***	140414	2*
Burner Orifice (Injector)	**	2*
L.P. Conversion Label	114515	2*

*This includes 1 for each pocket/tumbler.

**Refer to page 14 for orifice (injector) size.

***Required for unregulated propane or butane only.

Instructions

Disconnect electrical power to the dryer.

Close all shutoff valves (for both top and bottom tumbler) in dryer’s gas supply line.

Important

!The following procedures must be performed on both top and bottom tumblers.

Open the panels located just below each loading door.

Locate the gas train and disconnect the union, 3 electrical plugs, and the gas train mounting screws from the burner. Carefully slide the gas train out of the gas train enclosure. (The carbon ignitor located at the far end of the gas train is very fragile.)

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Maytag Co.