Chapter 5. Electrical System; Introduction; Figures And Illustrations; Steamcraft 3.1 Electrical Circuits - Cleveland steamcraft 21-CET-8 Service Manual

INTRODUCTION

Figures And Illustrations

STEAMCRAFT 3.1 ELECTRICAL CIRCUITS

High Voltage Circuit

120 VAC Circuit

Printed 12/90

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
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.
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.
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 transformer. 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.
The transformer secondary supplies power to the 120 VAC components through the
ON/OFF switch. The 120 VAC components include:
• Fill Solenoid Valve
• Condenser Solenoid Valve
• Rinse Solenoid Valve
• Drain Solenoid Valve
Float assembly switches, the timer, and the TIMED/MANUAL switch control
operation of the 120 VAC components.
Model 21-CET-8 Service Manual
• Heater Contactor
• Relay K1
• Timer control circuits
• 3-minute timer
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