Operating steam pressure – ADC AD-78 User Manual
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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 with local and state regulations or codes.
H. STEAM INFORMATION
IMPORTANT: Failure to comply with the requirements stipulated in this manual can result in
component failure which will VOID THE WARRANTY.
NOTE: The ADS-78 is manufactured with a pneumatic (piston) damper system which requires
an external supply of clean, dry, regulated air (80 PSI +/-10 PSI).
1. 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.
I IMPORTANT: Coil failure due to improper PH level will VOID THE WARRANTY.
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2. Steam Requirements - High Pressure
Inlet---------1" supply line connection — qty. one (1) at top manifold.
Return----- 1" return line connection — qty. one (1) at bottom manifold.
Operating Steam Pressure
Maximum
125 psig
Minimum
100 psig
Heat Input (Normal Load)
7 Bhp
Consumption (approximate)
239 Ibs/hr
3. Installation Instractions
To insure an adequate supply of steam is provided, be sure that the steam lines and steam return lines are
sized and laid out as stipulated in this manual. Inadequate steam 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.
a. The pressure of the condensate in the steam supply 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 12-inch riser. This will prevent any condensate from draining towards the dryer.
b. The steam supply piping to the dryer must include a 12-inch rise along with a drip trap and check valve.
This will prevent any condensate from entering the steam coil.
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