Vulcan VSX3E Manuel d'utilisateur télécharger pdf (Page 32)

VSX SERIES STEAMER - ELECTRICAL OPERATION

Page 32 of 40

DELIME CYCLE

1. Steamer is in a cook cycle where the delime

board monitors the cook time.

2. Delime light comes on.

A. Cook cycle ends and product removed.

3. Power switch turned to delime position.

4. 3K energized.

A. Contacts 3K-1 NO close.

B. 1M energized and drain closes.

C. Delime board transformer energized.

D. Contacts 3K-1 NC open.

E. Contacts 3K-2 NO close.

1) Delime time is reset to “0".

5. Turn steamer off and perform delime procedure.

GAS MODELS

INITIAL FILL & PREHEAT

1. Conditions.

A. Unit connected to correct voltage.

B. Supply water valve "on".

C. Gas supply valve “on”.

D. Power switch "off".

E. High limit thermostat closed.

F. Control Thermostat closed.

G. Drain open and tank empty.

H. Door closed.

I. Timer "off".

J. Tank and WLC properly grounded (share

common ground).

2. Power switch turned "on".

A. L1 (120VAC) to one side of 1M; Pin 11,

WLC; 1SOL, 1K; 2K; 2LT; 2SOL; BUZZER;

TM; 1T which in turn supplies 24VAC to one

side of Ignition Module, TH, 4LT and Gas

Valve.

B. NEUTRAL (120VAC) to one side of 1M,

drain motor; pins 4,8 & 12 of water level

control.

1) 1M drain motor energized; drain valve

closed.

2) 1SOL energized thru HL-2; Water flows

to tank.

3. Water reaches LLCO probe.

A. LLCO energizes.

1) Contacts LLCO-1 open; LLCO-2 close.

2) LLCO LED lights.

4. Water reaches LL (Low Level) probe.

5. Water reaches HL (High Level) probe.

A. Internal relay HL energize.

B. HL LED lights.

C. Internal relay coil HL locks through HL-1.

6. 1SOL de-energized; water flow off.

A. After the initial fill, the water level is

maintained by 1SOL being energized when

the water level drops below the LL probe

and being de-energized when the water

level reaches the HL probe. This will not

affect operation of either the preheat or

cook cycle due to 1K being energized and

locked during the initial fill.

B. 1K energized and locks 1K coil when 1K

NO/C close.

C. 2K energized thru 2TAS, 1K-NO/C, WLC-

LLCO-2.

D. Ignition Module energized thru 2K-2 NO/C,

2TAS, 1K-NO/C, WLC-LLCO-2.

7. After the ignition module is energized, ignition

trial cycle begins.

A. Module purges for 5 seconds to allow time

for any residual gas to dissipate. After purge

time elapses, HSI begins a 3 second heat

up time.

B. When HSI heat up time elapses, the gas

solenoid valve opens to supply gas to the

hot ignitor.

C. Burner will light, flame sense probe detects

flame, HSI de-energizes after an 8.5 second

ignition trial time, gas valve stays open and

heating begins.

8. Tank temperature reaches set point.

A. 2TAS opens.

9. 2K de-energized.

A. Ignition Module de-energized.

1) Burners off.

B. 1LT ready light energized, indicating tank is

at hold temperature. 1LT uses bleed through

voltage.

10. Tank temperature drops below set point.

A. Tank temperature is maintained by the

burners cycling with control thermostat

2TAS until time is dialed on the timer, water

level drops below the low level cut-off probe

or the power switch is turned “off”.

B. 1LT ready light goes out.

11. Water level drops below LL probe.

A. Internal relay HL de-energized, contacts HL-

1 open; HL-2 close; HL-3 open.

1) Power is removed from the heating and

cooking circuits.

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