MAXIDRY MAXI120, Installation Manual, Page: 18 / 30

18 113257-4
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: In standard format this dryer is manufactured with a
pneumatic (piston) damper system, which requires an
external supply of air (80 psi +/- 10 psi [5.51 bar +/- 0.68
bar]). This dryer may be provided with an optional steam
solenoid valve, in which case, no pneumatic steam damper
system is provided.
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
STANDARD 2-STAGE STEAM COIL
Inlet – 1-1/4” N.P.T. supply line connections – qty. two at first
(top) and third manifold.
Return – 1” N.P.T. return line connections – qty. two at second
and fourth (bottom) manifold.
Shaded areas are stated in metric equivalents
* The minimum operating pressure for optimum results is 100 psig (689.47 kPa).
** 174 psig (1,200 kPa [12 bar]) with optional one-stage steel steam coil only.
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 12-inch (30.48
cm) riser. This will prevent any condensate from draining
towards the dryer.
Figure 1: Piping Diagram for Standard 2-Stage Steam Coil
OPTIONAL 1-STAGE STEEL STEAM COIL
Inlet – 1-1/4” N.P.T. Supply Line Connection – qty. one (1) at
top manifold.
Return – 1-1/4” N.P.T. Return Line Connection – qty. one (1)
at bottom manifold.
OPERATING STEAM PRESSURE
Maximum *
Heat Input
(Normal Load)
Consumption (Approx.)
@ Maximum Pressure
125 psig 862 kPa 13 Bhp 450 lb/hr 204.12 kg/hr
174 psig **
1,200 kPa **
14.5 Bhp ** 515 lb/hr **
234 kg/hr **