WFR113539-13 www.adclaundry.com 27
Gas Pressure Testing _________________
For proper operation, the gas pressure must be correct,
consistent and maintained at the gas pressure rates shown
on
page 23 and page 24. Provisions are made at the gas
valve for taking gas pressure readings.
There are 2 types of devices used to measure gas pressure.
They are the spring/mechanical type gauge and the
manometer. The use of the spring/mechanical type gauge is
not recommended because they are very easily damaged and
are not always accurate. The preferred type of gauge is the
manometer because it is a simple device to use and is highly
accurate. A manometer is simply a glass or transparent plastic
tube with a scale graduated in inches or mb. When it is filled
with water and pressure is applied, the water in the tube rises,
showing the exact gas pressure.
Gas Pressure Test Procedure
Turn gas cock in gas supply line to “OFF” position.
Back out miniature screw inside pressure tap and attach
manometer (refer to the illustration on
page 26).
Turn gas cock to “ON” position.
Start the dryer in Heat Mode and wait for ignition. Gas manifold
pressure should be as shown on
page 23 and page 24.
If the gas pressure needs to be adjusted, refer to “Gas
Pressure Adjustment” on
page 26.
Once test is complete, turn gas cock to “OFF” position.
Remove manometer. Tighten screw inside the pressure tap
or install plug.
Turn gas cock to “ON” position and check for leaks with soap
solution with main burner “ON.”
Steam Information ____________________
The AD-50i/M-50p and the AD-80i/M-80p are available with
steam heat. (Steam heat is not available on the AD-35i.) If
your dryer was manufactured with steam heat, it is your
responsibility to have all plumbing connections made by a
qualified professional to ensure that the steam plumbing
installation is adequate and conforms with local, state, and
country regulations or codes.
Care must be exercised when leveling steam dryers into final
position. This will promote good steam coil drainage. Return
lines should be level or pitched down slightly for good drainage.
Absence of these conditions will result in probable water
hammer and premature heat exchanger fracture and leakage.
The presence of condensate in the steam will cause water
hammer and subsequent heat exchanger failure. The steam
supply connection must be taken from the top of a
well-dripped steam main. If the supply run-out to the dryer
exceeds 25 feet (7.6 meters), it should be dripped just before
the control valve with a proper trap and dirt pocket.
IMPORTANT: Failure to comply with the requirements
stipulated in this manual can result in component failure,
which will void the warranty.
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.
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 10-inch (25.4 cm) riser.
This will prevent any condensate from draining towards the
dryer.
The steam supply line to the dryer must include a 12-inch
(30.48 cm) riser along with a drip trap and check valve. This
will prevent any condensate from entering the steam coil.
Flexible hoses or couplings must be used as shown. 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(s), 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.
OPERATING STEAM PRESSURE
Maximum 150 psig*
1.0 MPa
Heat Input (Normal Load) 3.6 Bhp
Consumption (Approximate) 140 lb/hr
63.50 kg/hr
Inlet (1) 3/4” N.P.T. FEMALE
Return (2) 3/4” N.P.T. MALE
IMPORTANT: Coil failure due to improper pH level will void
the warranty.
AD-80i/M-80p Steam Requirements
– High Pressure
OPERATING STEAM PRESSURE
Maximum 150 psig*
1.0 MPa
Heat Input (Normal Load) 2.7 Bhp
Consumption (Approximate) 105 lb/hr
47.62 kg/hr
Inlet / Return 3/4” / 3/4”
Shaded areas are stated in metric equivalents
* The minimum operating pressure for optimum results is 100 psig (689.47
kPa).
AD-50i/M-50p Steam Requirements
– High Pressure
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