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The circuit diagram below shows a typical wiring and control setup for a warmer drawer on an
electric or gas range. The warmer drawer is designed to operate on 120 VAC. The L1 wire on the
warmer drawer switch is connected to L1 in the power supply harness and the L2 wire on the switch
is connected to the neutral circuit in the harness. When the switch is turned on the contacts L1-H1
close connecting the L1 circuit to one side of the warmer drawer element. The contacts L2 - H2
also close completing the neutral circuit to the ½ wave diode which connects to the other side of the
element. This circuit provides approximately 60 volts AC to the element resulting in lower wattage
heat output from the element.
There is a parallel neutral circuit that provides neutral to the element through the Low Limit
Thermostat. This circuit is always closed unless the temperature of the warmer drawer has reached
the cut out point of the low limit thermostat. The purpose of this circuit is to allow the element to
operate at full wattage and bring the drawer up to minimum operating temperature more rapidly. Once
the low limit thermostat opens the circuit from H2 through the diode provides the neutral circuit to the
element.
Warmer Drawer Theory of Operation
The purpose of the Warmer Drawer is to keep hot cooked foods at serving temperature. Always start with hot
food. It is not recommended to heat cold food in the Warmer Drawer. All food placed in the Warmer Drawer
should be covered with a lid or aluminum foil to maintain quality.
The operation of the warmer drawer element is controlled by a separate rotary switch on the control panel.
The element cycles on and off at varying rates in relation to the selected setting causing the temperature to
increase or decrease. The actual temperature can also be affected by environmental conditions such as room
temperature, air currents, and customer use. The warmer drawer temperature is not precisely controlled
and variations from the operating temperatures listed below are normal.
WARMER DRAWER
WARMER DRAWER TEMPERATURE TABLE
SETTING HI MED LO
*TEMP
RANGE (°F) 180-200 160-180 140-160
* TEMPERATURES ARE APPROXIMATE
For best results, preheat the drawer
before adding food. An empty drawer will
preheat in approximately 15 minutes.
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