American Dryer Corp T75, T30 Preparation for Operation/Start-Up, Preoperational Test, Gas Dryers

Important

!Flexible supply line/coupling must be used. Solenoid valve failure due to hard plumbing

connections will void warranty.

The dryer is to be connected to the water mains using a new hose set and the old hose set should not be reused.

Optional Manual Bypass

Provisions are made in the dryer’s fire suppression system for the installation of an optional manual bypass. The connections for the manual bypass are made at the “tee” or “three way” fitting located in the outlet supply side of the water solenoid valve. The manual ball cock shutoff valve must be located outside of the dryer at a distance from the dryer where it is easily accessible. The use and connection of this manual bypass is at the option or discretion of the owner.

The water connection for the manual bypass is made to the “tee” or “three way” fitting, which has a 3/8” F.N.P.T. and a coupling must be used to provide the minimum 1/2-inch (12.7 mm) supply (feed) line.

Electrical Requirements

No independent external power source or supply connection is necessary. The 24-volt power to operate the fire suppression system is accomplished internally in the dryer (from the dryer controls).

Warning

!Electrical power must be provided to the dryer at all times. If the main electrical power supply to the

dryer is disconnected, the fire suppression system is inoperative!!

Preparation for Operation/Start-Up ___

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 data label. In the case of 208 VAC or 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 – Be sure that all gas shutoff valves are in the open position.

•Be sure all back panels (guards) and electric box covers are in place.

•Be sure the service doors are closed and securely in place.

•Be sure the lint door/drawer is securely in place.

•Rotate the tumbler (drum) by hand to be sure it moves freely.

•Check bolts, nuts, screws, terminals, and fittings for tightness and security.

•Check that the vent is connected to the dryer and is exhausted to the outdoors.

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

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.

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

Gas Dryers

Open all shutoff valves.

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

Note

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

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 pressure tap of the gas valve body) must be

verified.

Important

!In most cases 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.

Electrical Dryers

Check to ensure that electric oven/contactor assembly is activating.

Safety Related Circuits

Make a complete operational check of all safety related circuits:

•Door Switch(es)

•Hi-Limit Thermostats

•Sail Switch

Make a complete operational check of all operating controls.

Tumbler Coating

The tumbler is treated with a protective coating. We suggest dampening old garments or cloth material with a solution of water and nonflammable mild detergent and tumbling them in the tumbler to remove this coating.

Microprocessor Programs/Selections

Each microprocessor controller (computer) has been preprogrammed by the factory with the most commonly used parameter (program) selections. If computer program changes are required, refer to the computer programming manual which was shipped with the dryer.

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