Steam Requirements – High Pressure
Operating Steam Pressure
Model | Maximum |
| Heat Input | Consumption (Approx.) | Inlet / | ||
| (Normal Load) | @ 125 psi (8.6 bar) | Return | ||||
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M31SL | 150 psig* | 1.0 | MPa | 1.75 Bhp | 63 lb/hr | 28.58 kg/hr | 1/2” / 1/2” |
M50SL | 150 psig* | 1.0 | MPa | 3.75 Bhp | 127.5 lb/hr | 57.83 kg/hr | 3/4” / 3/4” |
M75SL | 150 psig* | 1.0 | MPa | 4 Bhp | 136 lb/hr | 61.69 kg/hr | 3/4” / 3/4” |
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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 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
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 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
The supply line and the return line should be insulated. 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
Important
!Flexible hoses/couplings must be used. Coil failure due to hard plumbing connections will void
the warranty.
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
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.
! | 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
Note
!The
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.
24 | American Dryer Corp. | 113431 - 10 |