NOTE: The dryer must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.5 kPa).
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, and regulated air of 0.75 cfh (0.02 cmh) @ 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.
Steam Requirements, High Pressure
Inlet | |
| qty. 1 at top manifold. |
Return | |
| qty. 1 at bottom manifold. |
Operating Steam Pressure
Maximum | 125 psig* | 862.84 kPa |
Heat Input (Normal Load) | 13 Bhp | |
|
|
|
Consumption (Approximate) | 450 lb/hr | 202.2 kg/hr |
|
|
|
Shaded areas are stated in metric equivalents
*The minimum operating pressure for optimum results is 100 psig (689.47 kPa).
Installation Instructions
To ensure that 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 and steam return lines or improper steam plumbing will result in poor performance and can cause component failure. Clean, dry, and regulated steam must be provided to the dryer.
IMPORTANT: Steam coil failure due to water hammer by wet steam will void the warranty.
The pressure 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 within a minimum
The steam supply line to the dryer must include a
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, return, and drip trap return lines. This will allow the dryer to be isolated from the supply and return mains if the dryer needs maintenance work.
Install an inverted bucket steam trap and check valve for each unit at least
A trap with a capacity of 1,200 lb (544 kg) of condensate per hour at 125 psi (8.61 bar) is needed for each unit.
A
Dryers with optional solenoid valve must be mounted with coil positioned directly above the valve body.
The supply and return lines should be insulated. This will save energy and provide safety for the operator and maintenance personnel.
Water pockets in the supply line, caused by low points, will provide wet steam to the coil possibly causing coil damage. All horizontal runs of steam supply piping should be pitched
18 | American Dryer Corp. | 113335 - 12 |
