Cleveland steamcraft 21-CET-8, Service Manual, Page: 70 / 139

Model 21-CET-8 Service Manual Page 63
CHAPTER 5. ELECTRICAL SYSTEM
This chapter is exclusively for Cleveland Range authorized service representatives.
These representatives should be experienced in the service, repair and
maintenance o f food service equipment in general, and with Cleveland Range
equipment specifically. The service representative must thoroughly understand
Chapters 1 through 4 of this manual before applying any of the information or
instructions in this chapter. This chapter includes:
• An overview of the SteamCraft 3.1 electrical circuits
• Functional Block Diagrams
• A detailed description of circuit operations
• A functional description of the major components
• A guide for testing the major components
STEAMCRAFT 3.1 ELECTRICAL CIRCUITS
There are two parts to the SteamCraft 3.1 circuitry: the high voltage circuits and the
120 VAC circuits. In the electronic key pad units, a 24 VAC circuit powers the timer.
High Voltage Circuit
The high voltage circuit draws power directly from the external supply lines to power
the heater elements, the dryer element, and the primary of the trans former. The high
voltage value depends on local supply line voltage. The required characteristics of
the external power supply are listed on the Product Identification Plate, as described
in Chapter 1 .
While the main power switch is ON, line power energizes the primary of the
transformer through 2 -amp fuses. When the control circuits call for operation,
contacts of the heater contactor dose to power the beater elements.
120 VAC Circuit
The transformer secondary supplies power to the 120 VAC components through the
ON/OFF switch. The 120 VAC components include:
• Fill Solenoid Valve • Heater Contactor
• Condenser Solenoid Valve • Relay K1
• Rinse Solenoid Valve • Timer control circuits
• Drain Solenoid Valve • 3-minute timer
Float assembly switches, the timer, and the TIMED/MANUAL switch control
operation of the 120 VAC components.
Printed 12/90
INTRODUCTION
Figures And Illustrations
Most illustrations in this chapter are on the same page or near the text in which they
are first referenced. However, the Electrical Schematics and Wiring Diagrams are
included with the other service drawings in Chapter 6 . These electrical drawings are
Figures 6-14 through 6-17.