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27
ADG-530HS
G
AS
I
NLET
S
IZE
(
EACH BASKET
/
TUMBLER
)3/4" N.P.T.
B
TU
/
HR
I
NPUT
(
EACH BASKET
/
TUMBLER
) 102,000
B
TU
/
HR
I
NPUT
(
TOTAL FOR BOTH BASKETS
/
TUMBLERS
)204,000
N.P.T.
=
N
ATIONAL
P
IPE
T
HREAD
b. Natural Gas
Regulation is controlled by each gas valve’s internal regulator. Incoming supply pressure must be
consistent between a minimum of 6.0 inches and a maximum of 12 inches water column pressure.
c. Liquid Propane (L.P.) Gas
Dryers made for use with L.P. gas valve’s pressure regulator blocked open so that the gas pressure must
be regulated upstream of the dryer. The pressure measured at each gas valve body pressure tap must be
a consistent 10.5 inches water column. There is no regular 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.
3. 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 the gas pressure regulators meet applicable pressure requirements and that gas meters be
rated for total amount of ALL the appliance Btu’s being supplied.
The dryer is provided with two (2) 3/4” N.P.T. inlet pipe connections (one for each basket/tumbler) at the rear of
the dryer. If a separate feed is provided for each basket (tumbler) from the main supply line (header), then a
3/4” line connection is sufficient. However, if the top basket (tumbler) and the bottom basket (tumbler) connec-
tions are connected together, the supply from the header must be increased to 1-inch (maximum fifty [50] feet to
the header). For typical gas connections refer to the illustration on page 28. It is recommended that a gas shut-
off valve be provided to the gas supply line of each dryer basket (tumbler) for ease in servicing.
The size of the gas supply line (header) will vary, depending on the distance this supply line travels from the gas
meter (or in case of L.P. gas, the supply tank), the number of tees, other gas-operated appliances on the supply
line, ect. Specific information regarding supply line size should be determined by the gas supplier.
NOTE: Undersized gas supply piping can create a low or inconsistent gas 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 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 inches water column pressure. Refer to the illustration on
the following page (page 28) for details