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H. 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 with 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 MLS-122 is manufactured with a pneumatic (piston) damper system, which requires an
external supply of clean, dry, regulated air 80 PSI +/- 10 PSI (5.51 bars +/- 0.69 bars). Refer
to Steam Damper Air System Connections, item 4 on page 29.
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.
IMPORTANT: Coil failure due to improper PH level will VOID THE WARRANTY.
2. Steam Requirements - High Pressure
Inlet -------- 1-1/4" supply line connection -- qty. one (1) at top manifold.
Return ----- 1-1/4" return line connection --- qty. one (1) at bottom manifold.
3.
Installation Instructions
To insure 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.
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 (30.48 cm) riser. This will prevent any condensate from draining towards the
dryer.
b. The steam supply piping to the dryer must include a 12-inch (30.48 cm) rise along with a drip trap and
check valve. This will prevent any condensate from entering the steam coil.
OPERATING STEAM PRESSURE
MAXIMUM
125 psig
862 kPa
MINIMUM
100 psig
689 kPa
HEAT INPUT (Normal Load)
13 Bhp
CONSUMPTION (Approximate) 450 lbs/hr
204 kg/hr
* Shaded areas are stated in metric e
q
uivalents