Cleveland SteamCraft 10 Service Manual page 84

Page 78 SteamCraft 10 Service Manual, Chapter 5
Cleveland Range, Inc.
C. When the upper cooking compartment is set for a period of timed
steaming, the upper compartment steaming circuits are energized
through the timer circuit. The lower compartment continues MANUAL
steaming as described in step B.
• For Dial Timers: The countdown starts as soon as the timer is set
and the dial is released.
• For Key Pad Timers: The countdown delays until the compartment
reaches cooking temperature. The normally open Compartment
Thermostat closes and allows the timer countdown.
1. The upper compartment condenser and steam valves function
exactly as the valves in the lower compartment (described in B.I.
above). Steam from the generator passes through the upper steam
valve into the upper cooking compartment (Figures 5-7).
2. Relay R1 is energized. The R1 contactor closes, by-passing the
preheat side of the Preheat Thermostat in parallel with the R2
contactor. Refer to Figure 5-9. With both relays R1 and R2
energized, the closed contactors R1 and R2 also activate the second
stage of the gas valve, increasing gas flow to the burners.
• With one compartment set for steaming, the gas valve primary
stage supplies gas for a combustion rate of 70,000 to 75,000
BTU/hr.
• With both compartments set for steaming, the gas valve secondary
stage increases gas flow for a total combustion rate of 125,000
BTU/hr.
3. When the upper timer reaches zero, the condenser and steam valves
dose, stopping steam flow through the upper cooking compartment.
Relay R1 is de-energized, closing the secondary stage of the gas
valve. The steam generator continues its steaming cycle at a lower
combustion rate.
D. When the ON/OFF switch is set to OFF, the water fiIl and steaming
cycles stop. The blowdown cycle starts as explained on page 81.
Figure 5-9. Partial Schematic - Combustion Components
24-CGA-10
Models 24-CGA-10 and 24-CEA-10
Printed 3/93