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113376-4 Telephone 01422 822282 15
Operating Steam Pressure
Maximum 125 psig*
861.84 kPa
Heat Input (Normal Load) 19 Bhp
Consumption (Approximate) 725 lb/hr
328.85 kg/hr
Steam Information ____________________
It is your responsibility to have all steam plumbing connections
made by a qualified professional to ensure that the 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 +/- 0.68 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.
TYPICAL NATURAL GAS INSTALLATION
TYPICAL L.P. GAS INSTALLATION
Steam Requirements – High Pressure
Inlet ................ 1-1/2” N.P.T. supply line connection (1 at top manifold)
Return ............ 1-1/2” N.P.T. return line connection (1 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.
The presence of the condensate in the steam supply line will
cause water hammer and subsequent heat exchanger (steam
coil) failure. The steam supply connection into the main
supply line must be made with a minimum 10-inch (25.4 cm)
riser. This will prevent any condensate from draining towards
the dryer.
The steam supply line to the dryer must include a 12-inch
(30.48 cm) riser along with a drip trap and check valve. This
will prevent any condensate from entering the steam coil.
Flexible hoses or couplings must be used. The dryer vibrates
slightly when it runs and this will cause the steam coil
connections to crack if they are hard piped to the supply and
return mains.
Shutoff valves for each dryer should be installed in the supply
line, return line, and drip trap return line. This will allow the
dryer to be isolated from the supply main and the return main
if the dryer needs maintenance work.
Install an inverted bucket steam trap and check valve at least
12-inches (30.48 cm) below the steam coil as close to the
coil as possible. An inverted bucket steam trap with a capacity
of 2,000 lb (907.18 kg) of condensate per hour at 125 psi
(8.62 bar) is required for each dryer. (Based on 2 times the
steam consumption per hour.)
A 3/4-inch (19.05 mm) vacuum breaker should be installed.
This will save energy and provide for the safety of the operator
and maintenance personnel.
Water pockets in the supply line, caused by low points, will
provide wet steam to the coil possibly causing steam coil
damage. All horizontal runs of steam supply piping should
be pitched 1/4-inch (6.35 mm) for every one foot (0.30 meters)
back towards the steam supply header causing the
condensate in the line to drain to the header. Install a bypass
trap in any low point to eliminate wet steam.
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