Maytag MDG120 - Manual (Page 15)

NOTE: Undersized gas piping will result in
ignition problems, slow drying, increased use of
energy, and can create a safety hazard.
The dryer must be connected to the type of
heat/gas indicated on the dryer data label
affixed to the back of the dryer at the upper
right hand corner. If this Information does not
agree with the type of gas available, do not
operate the dryer. Contact the distributor who
sold the dryer.
IMPORTANT: Any burner changes or conver­
sions must be made by a qualified profes­
sional.
The input ratings shown on the dryer data label
are for elevations of up to 2,000 feet, unless
elevation requirements of over 2,000 feet were
specified at the time the dryer order was placed
with the factory. The adjustment or conversion
of dryers in the field for elevations over 2,000
feet are made by changing each burner orifice.
If this conversion is necessary, contact the
distributor who sold the dryer.
TECHNICAL GAS DATA
Gas Specifications
Type of Gas
Natural Liquid Propane
Manifold Pressure* 3.5-4.0 Inches W.C. 10.5-11.0 inches W.C.
Inline Pressure 6.0 to 12.0 inches W.C. 11.0 Inches W.C.
* Measured at gas valve pressure tap when the gas valve Is on
GAS Connections:
Inlet connection 1-inchN.P.T.
Inlet supply size 1-inch N.P.T. (mini­
mum)
Btu/hr input (per dryer) 375,000
Natural Gas
Regulation is controlled by the dryer’s gas
valve’s Internal regulator. Incoming supply
pressure must be consistent between a mini­
mum of 6.0 inches and a maximum of 12.0
inches water column pressure.
Liquid Propane (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 regu­
lated upstream of the dryer. The pressure
measured at each gas valve pressure tap must
be a consistent 11.0 inches water column.
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.
Type of Gas
LP.
Conversion
Kit Part
Number
Model
Number
BTU
Per Hour
Rating
Natural Liquid Propane
Qty. QM.S*
Рал.
Nurrber
Qty. □iM.a* Part
Nurtet
MDG120 375,000 3 #4 140832 3 #30 I4081S 880886
*D.M.S. (Drill Material Size) equivalents are as follows:
Natural Gas............................. #4 = .2090”
Liquid Propane Gas................#30 = .1285”
PIPING/CONNECTIONS
ALL components/materials must conform to
National Fuel Gas Code Specifications, or in
CANADA, the Canadian Installation Codes (for
General Installation and Gas Plumbing). 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’s being supplied.
The dryer is provided with a 1-inch N.P.T. inlet
pipe connection extending out the back area of
the burner box. The minimum pipe size connec­
tion (supply line) to the dryer is 1-inch N.P.T.
For ease of servicing, the gas supply line of
each dryer must have its own shut-off 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 appli­
ances on the same 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 1 -
inch pipe gas loop be installed in the supply line
serving a bank of dryers. An in-line pressure
regulator must be installed in the gas supply
line (header) if the (natural) gas pressure
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