American Dryer Corp ML-130 III Preparation for Operation, Preoperational Test, Electric Models

Steam Damper Air Piston (Flow Control) Operation Adjustment System

Although the damper operation was tested and adjusted prior to shipping at 80 psi (5.51 bar), steam damper operation must be checked before the dryer is put into operation. Refer to the previous page for instructions to check steam damper system operation. If damper air adjustment is necessary, locate flow control valve and make necessary adjustments as noted below.

Preparation for Operation ____________

The following items should be checked before attempting to operate the dryer:

Read all “CAUTION,” “WARNING,” and “DIRECTION” labels attached to the dryer.

Check incoming supply voltage to be sure that it is the same as indicated on the dryer data label. In case of 208 VAC or 230/240 VAC, the supply voltage must match the electric service exactly.

GAS MODELS – check to ensure that the dryer is connected to the type of heat/gas indicated on the dryer data label.

GAS MODELS – the sail switch damper assembly was installed and adjusted at the factory prior to shipping. However, each sail switch adjustment must be checked to ensure that this important safety control is functioning.

GAS MODELS – be sure that all gas shutoff valves are in the open position.

Be sure all back panels (guards) and electric box covers have been replaced.

Check all service doors to ensure that they are closed and secured in place.

Be sure lint drawer is securely in place.

NOTE: Lint drawer must be all the way in place to activate safety switch otherwise the dryer will not start.

Rotate the tumbler by hand to be sure it moves freely. Check bolts, nuts, screws, terminals, and fittings for security.

STEAM MODELS – check to ensure air supply (80 psi [5.51 bar]) is on the dryer.

STEAM MODELS – check to ensure all steam shutoff valves are open.

STEAM MODELS – check steam damper operation. Check tumbler bearing setscrews to ensure they are all tight.

Preoperational Test __________________

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 or due to marginal location (installation) conditions.

Turn on electric power to the dryer.

Make sure the main door is closed and the lint drawer is securely in place.

Refer to the Operating Instructions for starting your particular model dryer.

Check to ensure that the tumbler starts in the clockwise direction. Additionally, check the direction of the blower motor (impellor/fan) to ensure that the blower motor (impellor/fan) rotates in the clockwise direction as viewed from the front. If it is, the phasing is correct. If the phasing is incorrect, reverse 2 of the leads at L1, L2, or L3, of the power supply connections made to the dryer.

IMPORTANT: Dryer blower motor (impellor/fan) as viewed from the front must turn in the clockwise direction, otherwise dryer efficiency will be drastically reduced and premature component failure can result.

Heat Circuit Operational Test

Gas Models

When the dryer is first started (during initial start-up), the burner has a tendency not to ignite on the first attempt. This is because the gas supply piping is filled with air, so it may take a few minutes for this air to be purged.

If the dryer is equipped with a DSI system, the DSI control module has internal diagnostics. If ignition is not established within 3 attempts, the heat circuit in the DSI control module will “LOCKOUT” until manually reset. To reset the DSI system, open and close the main door and restart the dryer.

If the dryer is equipped with an HSI system, the HSI control module has internal diagnostics. If ignition is not established after the first attempt, the heat circuit in the HSI control module will “LOCKOUT” until manually reset. To reset the HSI system, open and close the main door and restart the dryer.

NOTE: During the purging period, check to be sure that all gas shutoff valves are open.

Once ignition is established, a gas pressure test should be taken at the gas valve pressure tap of each dryer to ensure that the water column pressure is correct and consistent.

NOTE: Water column pressure requirements (measured at

the gas valve pressure tap)...

Natural Gas	3.5 in wc (8.7 mb).
L.P. Gas	10.5 in wc (26.1 mb).

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.

Electric Models

Check the oven contactor(s) to ensure that the electric oven is cycling properly.

20 American Dryer Corp. 113335 - 12