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Installation
31
510975
Gas Requirements
(Gas Dryers)
NOTE: The gas service to a gas dryer unit must
conform with the local codes and ordinances or, in
the absence of local codes and ordinances, with the
latest edition of the National Fuel Gas Code ANSI
Z223.1/NFPA 54 or the CAN/CGA-B149, National
Gas Installation Code.
Natural Gas, 1,000 Btu/ft
3
(37.3 MJ/m
3
), service
must be supplied at 6.5 ± 1.5 inch water column
pressure.
For proper operation at altitudes above 2,000 feet
(610 m) the natural gas valve spud orifice size must be
reduced to ensure complete combustion. Refer to
Table 1.
L.P. (Liquefied Petroleum) Gas, 2,500 Btu/ft
3
(97.1 MJ/m
3
), service must be supplied at 10 ± 1.5
inch water column pressure.
NOTE: DO NOT connect the dryer unit to L.P. Gas
Service without converting the gas valve. A 458P3
L.P. Gas Conversion Kit must be installed by the
Manufacturer’s Authorized Dealers, Distributors,
or local service personnel.
NOTE: The dryer unit and its individual shut-off
valve must be disconnected from the gas supply
piping system during any pressure testing of that
system at test pressures in excess of 1/2 psi
(3.45 kPa).
NOTE: When connecting to a gas line, an
equipment shutoff valve must be installed within 6'
(1.8 m) of the dryer. An 1/8" N.P.T. pipe plug must
be installed as shown. Refer to Figure 20.
Natural Gas Altitude Adjustments
Altitude Orifice Size
Part
Number
feet m # inches mm
2000 610 41 0.0960 2.44 503776
3000 915 42 0.0935 2.37 503777
5500 1680 43 0.0890 2.26 503778
7000 2135 44 0.0860 2.18 58719
9000 2745 45 0.0820 2.08 503779
10500 3200 46 0.0810 2.06 503780
Table 1
To reduce the risk of gas leaks, fire or
explosion:
• Each dryer must be connected to the
type of gas as shown on nameplate
located in the door recess.
• Use a new flexible stainless steel
connector.
• Use pipe joint compound insoluble in
L.P. (Liquefied Petroleum) Gas, or Teflon
tape, on all pipe threads.
• Purge air and sediment from gas supply
line before connecting it to a dryer.
Before tightening the connection, purge
remaining air from gas line to each
dryer until odor of gas is detected. This
step is required to prevent gas valve
contamination.
• Do not use an open flame to check for
gas leaks. Use a non-corrosive leak
detection fluid.
• Any disassembly requiring the use of
tools must be performed by a suitably
qualified service person.
W315
WARNING