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14 American Dryer Corp. 113608-4
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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!!!
Water Information _____________________
Before You Start
Check Local Codes and Permits
Call your local water company or the proper municipal
authority for information regarding local codes.
Important
It is your responsibility to have all plumbing
connections made by a qualified professional to
ensure that the plumbing installation is adequate and
conforms to local, state, and federal regulations or codes.
It is the installer’s or owner’s responsibility to see that the
required water pressure, pipe size, or connections are
provided. The manufacturer assumes no responsibility if
the fire suppression system is not connected, installed, or
maintained properly.
Installation
Water Supply
The fire suppression system must be supplied with a
minimum water pipe size of 1/2-inch (12.7 mm) and be
provided with 40 psi +/- 20 psi (2.75 bar +/- 1.37 bar) of
pressure.
If the rear area of the dryer or the water supply is located in an
area where it will be exposed to cold/freezing temperatures,
provisions must be made to protect these water lines from
freezing.
TYPICAL L.P. GAS INSTALLATION
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Warning
If the water in the supply line or water solenoid
valve freezes, the fire suppression system will be
inoperative!!
Water Connections
The water connection is made to the 3/4”-11.5 NH hose
adaptor, which is shipped in the tumbler and must be installed
to the 1/2” N.P.T. water connection, located at the upper rear
of the dryer. A flexible supply line/coupling must be used in
an effort to avoid damaging the electric water solenoid valve.
Note
The 3/4”-11.5 NH is a standard hose coupling
screw thread. It is not to be confused with 3/4”
N.P.T. The sealing of an NH connection is made with a
washer opposed to the mating threads of an N.P.T.
assembly. The 2 thread designs are not compatible.
It is recommended that a filter or strainer be installed in the
water supply line.
Important
Flexible supply line/coupling must be used.
Solenoid valve failure due to hard plumbing
connections will void warranty.
The dryer is to be connected to the water mains using a
new hose set and the old hose set should not be reused.
Optional Manual Bypass
Provisions are made in the dryer’s fire suppression system
for the installation of an optional manual bypass. The
connections for the manual bypass are made at the “cross”
or “four way” fitting located in the outlet supply side of the
water solenoid valve. The manual ball cock shutoff valve
must be located outside of the dryer at a distance from the
dryer where it is easily accessible. The use and connection
of this manual bypass is at the option or discretion of the
owner.
The water connection for the manual bypass is made to the
“cross” or “four way” fitting, which has a 3/8” F.N.P.T. and a
coupling must be used to provide the minimum 1/2-inch (12.7
mm) supply (feed) line.
Electrical Requirements
No independent external power source or supply connection
is necessary. The 24-volt power to operate the fire
suppression system is accomplished internally in the dryer
(from the dryer controls).
Warning
Electrical power must be provided to the dryer at
all times. If the main electrical power supply to the
dryer is disconnected, the fire suppression system is
inoperative!!