American Dryer Corp. Phase 7 / OPL ensor Activated Fire Extinguishing System D120 - Manual (Page 14)

14 JLA Limited 113375 - 6
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Steam Information ___________________
It is your responsibility to have all plumbing connections
made by a qualified professional to assure that the gas
plumbing installation is adequate and conforms to local and
state regulations or codes.
Important
Failure to comply with the requirements
stipulated in this manual can result in component
failure, which will void the warranty.
Note
The dryer is manufactured with a pneumatic
(piston) damper system, which requires an
external supply of clean, dry, regulated air 80 psi +/- 10
psi (5.51 bar +/- 0.69 bar). Refer to Steam Damper Air
System Connections on the following page.
Steam Coil pH Level
The normal pH level for copper type steam coils must be
maintained between a value of 8.5 to 9.5. For steel type
steam coils the pH level must be maintained between a value
of 9.5 to 10.5. These limits are set to limit the acid attack of
the steam coils.
Important
Coil failure due to improper pH level will void the
warranty.
Steam Requirements – High Pressure
Inlet _______ 1-1/4” F.N.P.T. supply line connection
One at top manifold
Return _____ 1-1/4” F.N.P.T. return line connection
One at bottom manifold
Shaded areas are stated in metric equivalents
* The minimum operating pressure for optimum results is 100 psig (689.47
kPa).
Installation Instructions
To ensure an adequate supply of steam is provided, be sure
that the steam supply lines and steam return lines are sized
and laid out as stipulated in this manual. Inadequate steam
supply lines and steam return lines or improper steam
plumbing will result in poor performance and can cause
component failure. Clean, dry steam must be provided to
the dryer.
Important
Steam coil failure due to water hammer by wet
steam will void the warranty.
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Operating Steam Pressure
Maximum 125 psig* 862 kPa
Heat Input (Normal Load) 13 Bhp
Consumption (Approximate) 450 lb/hr 204 kg/hr
Consistent gas pressure is essential at all gas connections.
It is recommended that a 1-inch (2.54 cm) 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 12.0 in
WC (29.9 mb) pressure.
Note
A consistent water column test pressure of 3.5 in
WC (8.7 mb) for natural gas and 10.5 in WC
(26.1 mb) for L.P. dryers is required at the gas valve
pressure tap of each dryer for proper and safe operation.
A 1/8” N.P.T. plugged tap, accessible for a test gauge
connection, must be installed in the main gas supply line
immediately upstream of each dryer.
Important
Pipe joint compounds that resist the action of
natural gas and L.P. gas must be used.
Test all connections for leaks by brushing on a soapy
water solution (liquid detergent works well).
The dryer and its individual shutoff 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 psig (3.5 kPa).
Warning
Never test for leaks with a flame!!!
Note
The dryer must be isolated from the gas supply
piping system by closing its individual manual
shutoff valve during any pressure test of the gas supply
system at test pressures equal to or less than 1/2 psig
(3.5 kPa).
TYPICAL NATURAL GAS INSTALLATION
TYPICAL L.P. GAS INSTALLATION