Electronic Control Info.
Warming Drawer WWD30-2
3-3
#814750 - Revision A - January, 2011
DESCRIPTION OVERVIEW:
Element
:
The element will be powered by the element relay (normally-open contacts). This allows the element to be disabled
under most conditions. Only during a call for heat from the main controller, will the element relay be energized.
Fan:
The fan will be powered by the fan relay (normally-open contacts). This allows the fan to be disabled under most
conditions. Only during a warming mode from the main controller, will the fan be in use.
Drawer Input:
The drawer switch will be a normally open switch, (when drawer is open), and closed when drawer is closed.
When drawer is opened and is in a normal heating mode, unit will de-energize relays to fan and element. If back
lighting of the LCD is enabled, then opening of the drawer will turn on back lighting, and by closing the drawer, back
lighting will go off.
NOTE
:
Sabbath mode has unique requirements. Please see Sabbath mode this section.
User Display:
The user display shows warming drawer preset temperature, any timed feature which is in process, and whether the
unit is in Proof mode. Other indicators include the ‘ON’ indicator which notes when unit is heating, (always on when
in the Sabbath mode), and displays which temperature units, (°F or °C), the temperature is being displayed in.
This area also informs user if there is an issue with the control and will display an error code in the temperature
and/or timer display. The user display numbers will be displayed as shown in the following pages.
The characters in the user display will only be illuminated when a normal warming mode, service diagnostic mode, or
kitchen timer is being used. At all other times, display will be remain off.
The “PROOF” is on anytime “PROOF” mode is being used.
The “ON” indicator is on anytime control is calling for heat. The exception is during Sabbath mode where the ”ON”
indicator stays on constantly.
NOTE
:
“TIMER” is on anytime there is a timed warming event or if kitchen timer is being used.
NOTE
:
“TIMER” is not an option in Sabbath mode.
POWER Key:
The “POWER” key is used to turn unit on and off. While unit is in “OFF” mode, the Power key and “TIMER” up and
down arrow keys remain active. If unit is powered up and Power key is pressed, the display will turn off along with
any associated backlighting. If unit is off and the Power key is pressed, the control backlighting (if applicable), will
turn on and the rest of the keys will be active.
NOTE
:
If no other key is pressed within 20 seconds, unit will turn off.
TEMP Up/Down Key:
The “TEMP” up or down arrow keys can be used to adjust temperature. By pressing and holding the up or down
arrow, unit will begin changing at the rate of 1º per ½ second until the first 5º increment is obtained. If the user con-
tinues pressing, control will increment in 5º increments per ½ second. The “TEMP” up or down arrow keys remain
active as long as control is On.
NOTE
:
Exception to this is in the Sabbath Mode.
NOTE
:
Temperature range is 80ºF to 200ºF, except in “PROOF” mode where maximum temperature is 120ºF.
TIMER Key:
The “TIMER” up or down arrow key is used to change time left in normal warming mode. Timer keys can also be
used as a Kitchen Timer. The rate of this ascension shall be ½ second per increment and in the following order: one
minute from 1-5 minutes; every five minutes from 5-30 minutes; 30 minute increments up to 5 hours; then hourly up
to 24 hours. At any time during a Normal Heating Mode, operator can adjust time left for warming by pressing
“TIMER” up or down arrow keys.
NOTE
:
The exception to this is during the Sabbath Mode (only the “Power On/Off” key is active in this mode).
