Piping/Connections

Heat Input/Gas Consumption/Orifice (Injector) Data (For AGA [Australian] Models Only)*

Gas Specifications for AGA Approved Dryers (Australia)

	Gas	Supply	Gross	Orifice Size		Orifice	Burner
Model		Pressure	Heat Input			(Injector)	Pressure
	Type
						Quantity
		kPa	MJ/h	DMS	mm		kPa

M31SL	Natural	1.7-3.2	58.03	22	3.988	1	0.69
	Propane	2.75	58.03	44	2.184	1	2.49

M50SL	Natural	1.7-3.2	94.96	29	3.454	2	0.72
	Propane	2.75	94.96	47	1.994	2	2.49

M75SL	Natural	1.7-3.2	116.06	22	3.988	2	0.69
	Propane	2.75	116.06	44	2.184	2	2.49

Shaded areas are stated in metric equivalents

* Consult factory for elevations over 2,000 feet (610 meters) for correct orifice size.

M31SL	M50SL	M75SL

1/2”	1/2”	1/2”

CE and Australian dryer connections will be B.S.P.T., all others will be N.P.T.

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!!!

American Dryer Corp.

113431 - 10

Gas Specifications for AGA Approved Dryers (Australia)

Piping/Connections

M31SL

M50SL

M75SL