Cleveland 24CEM24 Service Manual

Statement of Responsibilities

This document is for use by experienced and trained Qualified Cleveland Range, LLC Authorized Service
Representatives who are familiar with both the safety procedures, and equipment they service.

Cleveland Range, LLC assumes no liability for any death, injury, equipment damage, or property damage
resulting from use of, improper use of, or failure to use the information contained in this document.

Cleveland Range, LLC has made every effort to provide accurate information in this document, but
cannot guarantee that this document does not contain unintentional errors and omissions.

The information in this document may be subject to technical and technological changes, revisions, or
updates.

Cleveland Range, LLC assumes no liability or responsibility regarding errata, changes, revisions, or
updates.

Qualified Cleveland Range, LLC Authorized Service Representatives are obligated to follow industry
standard safety procedures, including, but not limited to, OSHA regulations, and disconnect / lock out /
tag out procedures for all utilities including steam, and disconnect / lock out / tag out procedures for gas,
electric, and steam powered equipment and / or appliances

All utilities (gas, electric, water and steam) should be turned OFF to the equipment and locked out of
operation according to OSHA approved practices during any servicing of Cleveland Ran ge equipment

Qualified Cleveland Range, LLC Authorized Service Representatives are obligated to maintain up-to-date
knowledge, skills, materials and equipment.

Cleveland Range, LLC

1333 East 179th St., Cleveland, Ohio, U.S.A. 44110

Ph: 1-216-481-4900 Fx: 1-216-481-3782 Visit our Web Site at www.clevelandrange.com

CLEVELAND RANGE

SEQUENCE OF OPERATIONS

Electric Boiler Base

1. Supply voltage is sent to the primary of the Control Transformer.
x 115 VAC is sent from the secondary of the Control Transformer to the on/off rocker

switch.

2. To turn the unit on, depress the red on/off rocker switch.

x 115 VAC is sent to the upper cabinets and terminal block in control box.
x 115 VAC is sent to normally open drain valve closing it.
x 115 VAC is sent to L1 and L2 of the water level board.

3. With the water level board energized and no water in the boiler

x 115 VAC is sent from the WF terminal to the fill solenoid.
x The fill solenoid opens and the boiler fills through the drain valve.
x The water fills to the low probe shorting it to ground
x 115 VAC is sent from the HTR terminal through the normally closed contacts of the

highlimit pressure switch to contacts of the ice cube relay and the amber reset switch,
energizing the amber light.

4. When the momentary amber switch is depressed 115 VAC is sent to the coil of the ice cube
relay closing it.

x The relay latches itself through a jumper to the coil.

x If either the high-pressure switch or the low water cut of switch opens, the latch

circuit opens.

x When the contacts close the amber light will energize and the process may begin

again.

x The relay contacts close sending 115 VAC through the normally closed contacts of the

operating pressure switch to the coil of the contactor(s). .

5. With 115 VAC to the coil of the contactor(s).

x The contactor closes.
x Supply power is sent to the elements.

6. The water in the boiler is heated to steam.

x As steam is generated and pressure builds the air is pushed out through the steamtrap.
x When steam goes through the steam trap and heats it to 192 degrees it closes.

7. Pressure builds in the boiler to the set point of 8-10 PSI (except 36CEM16 or pressure
steamers that are set at 5PSI).

x The operating pressure switch opens and the heat circuit is de-energized.
x When the pressure drops below the set point the heat circuit is energized and the heat

process begins again.

8. Water continues to fill until the high probe is grounded.

x When the high probe is grounded the WF terminal on the water level board is de-

energized.

x The fill solenoid closes until the high probe is ungrounded for 05 seconds.
x If the water level drops below the low probe for more than 20 seconds the WF terminal

is energized and the water fill circuit begins again.

9. When the unit is turned off, by depressing the red rocker switch,

x 115 VAC is removed from the heat circuit.
x 115 VAC is removed from the drain circuit and the normally open drain valve opens

allowing the unit to drain.

x 115 VAC is sent to the 3-minute timer.
x The three-minute timer will energize the fill solenoid for 3 minutes while the steamer

drains.