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manual abstract
It is recommended that a 3/4" (1.91 cm) pipe loop be installed in the supply line serving the bank of dryers. An in-line pressure regulator must be installed in the gas supply line (header) if natural the gas line pressure exceeds 12.0 inches water column pressure. Refer to the illustration on the following page (page 28) for details. 27 IMPORTANT: Water column pressure of 4.0 inches (20.0 mbar) for natural gas dryers and 10.5 inches (37.0 mbar) for L.P. gas is required at the gas valve pressure tap of each dryer for proper and safe operation. A 1/8" N.P.T. plugged tap, accessible for a test gauge connection, must be installed in the main gas supply line immediately upstream of each dryer. IMPORTANT: Pipe joint compounds that resist the action of natural and L.P. gases must be used. WARNING: Test ALL connections for leaks by brushing on a soapy water solution (liquid detergent also works well). NEVER TEST FOR GAS LEAKS WITH AN OPEN FLAME. TYPICAL NATURAL GAS NST ALL ATI0N TYPICAL L.P. GAS INSTALLATION 28 H. Preparation For Operation The following items should be checked before attempting to operate the dryer: 1. Read and follow ALL "CAUTION", "WARNING", and "DIRECTION" labels attached to the dryer. 2. Check incoming supply voltage to be sure that it is the same as indicated on the dryer data label located behind the left coin control panel, on the right wall (refer to SECTION IX [page 45 and 46] of this manual). 3. Check to assure that the dryer is connected to the type of heat/gas indicated on the dryer data label. 4. The sail switch damper assemblies are installed and pre-adjusted at the factory prior to dryer shipment. However, each sail switch adjustment should be checked to assure that this important safety control is functioning. 5. Check bolts, nuts, screws, terminals, and fittings for security. 6. Be sure ALL gas shut-off valves are in the open position. 7. Be sure ALL back panels (guards) and electric box covers have been replaced. 8. Check ALL service doors to assure that they are closed and secured in place. 9. Rotate the baskets (tumblers) by hand to be sure they move freely. I. Preoperational Tests ALL dryers are thoroughly tested and inspected before leaving the factory. However, a preoperational test should be performed before the dryer is publicly used. It is possible that adjustments have changed in transit. 1. Turn On Electrical Power To The Dryer a. Open ALL gas shut-off valves. 2. Computer System Operational Test a. COIN MODELS ONLY 1) The LED display(s) read “00”, which means that the dryer is available. 2) Insert proper number of coins into coin acceptor. Once correct amount has been inserted, the dryer will start and the LED display will show amount of time vended. 29 NOTE: The dryer can be stopped at any time by opening the main door. To restart dryer, close the main door. 3) Repeat above procedure for other basket (tumbler). 3.Heat Circuit Operational Test a. GAS MODELS When a gas dryer is first started (during the initial start-up), it has a tendency not to ignite on the first attempt. This is because the gas supply piping is filled with air. It may take a few minutes for this air to be purged from the lines. The dryer is equipped with a Hot Surface Ignition (HSI) system which has internal diagnostics. If ignition is not established after the first attempt, the heat circuit HSI module will try two (2) additional times and if a flame is not established the HSI module will lock out until it is manually reset. To reset the HSI system, open and close the main door to restart the dryer. NOTE: During the purging period, check to be sure that ALL gas shut-off valves are open. Once ignition is established, a gas pressure reading should be taken at the gas valve pressure tap of each dryer to assure that the water column pressure is correct and consistent. NOTE: Water column pressure requirements (measured at the gas valve pressure tap from the manifold side of the gas valve): Natural Gas......3.5 Inches W.C. L.P. Gas ...........10.5 Inches W.C. IMPORTANT: THERE IS NO REGULATOR PROVIDED IN AN L.P. DRYER. The water column pressure must be regulated at the source (L.P. tank) or an external regulator must be added to each dryer. 4. Make a complete operational check of ALL safety-related circuits (i.e., lint basket switches and sail switches). NOTE: The sail switch can be checked for proper operation by opening the main door, and while holding the main door switch in, start the dryer. The heating unit should not come on. If it does, make the necessary adjustments. 30 5. Each basket (tumbler) SHOULD BE operated through one (1) complete cycle to assure that no further adjustments are necessary and that ALL components are functioning properly. IMPORTANT: The dryer baskets (tumblers) are treated with a protective coating. This coating can be removed by tumbling old clothes or material in the baskets (tumblers) using a mild detergent to remove the protect...