CAUTION: When servicing the HIGH VOLTAGE section of the dryer, the ELECTRIC SERVICE MUST BE DISABLED. THE "EMERGENCY STOP"
BUTTON DOES NOT DISABLE THE HIGH VOLTAGE TO THE DRYER.
1.Control/Electrical System Description
a.
The
1)Blower (squirrel cage fan) Motor
The Blower (squirrel cage fan) Motor circuit consists of a blower motor thermal magnetic overload. The overload current is adjustable by a dial located on the face of the overload. (Refer to the electrical specification diagram for correct current setting.)
Attached to the thermal magnetic starter is an auxiliary contact used to sense an overload trip. This produces a safety error so the dryer service is disabled (the dryer will not start).
In series with the thermal magnetic overload is the blower motor contactor. This device enables the supply voltage to reach the blower (squirrel cage fan) motor. The blower motor contactor is controlled by the Phase 5 microprocessor controller (computer). (Refer to Section
The blower (squirrel cage fan) motor used for gas model and for steam model dryers is 25 HP (horse- power). The motor wiring configuration is dependent on the specific voltage of the dryer. When wiring the motor, refer to the motor nameplate.
2)Drive (tumbler and basket) Motor
The Drive (tumbler and basket) Motor is supplied by the
The drive motor has two (2) separate sets of coils and two (2) separate sets of contacts. One (1) of these sets is for forward tumbler (basket and drum) rotation and the other for reverse tumbler (basket and drum) rotation. The thermal magnetic overloads and the contactors are located in the left hand electrical cabinet. The direction of the drive motor is determined by the phases going into the motor (i.e., in a reverse direction phase, L1 and L2 are switched). When viewing this contactor (from the front of the dryer), the left hand block connections are for the forward rotation direction (clockwise [CW]).
The drive (tumbler and basket) motor is a
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