Metro MBQ Heated Banquet Cabinet - Manual (Page 9)

B. ELECTRIC HEATING MODULE
CAUTION
DO NOT ATTEMPT TO SERVICE THE
MODULE UNLESS YOU ARE QUALIFIED
AND KNOWLEDGEABLE OF ELECTRICAL
REPAIRS AND ELECTRICAL SAFETY.
Your module has been designed to be user-
serviceable, assuming a basic knowledge
of the operation of electrical devices. This
section has been written to guide the user step
by step, and in layman’s terms, through the
dismantling and servicing of the module. Before
attempting to service your module, read the
appropriate Module Repair Procedures (found
elsewhere in this section) thoroughly. If you do
not understand the Repair Procedures or prefer
not to service your module yourself, or if your
warranty is still in effect, please contact our
Customer Service Department for the factory
authorized service agency nearest you. See
back cover for contact information.
DANGER
ELECTRICAL SHOCK HAZARD.
DISCONNECT POWER BEFORE SERVICING
OR CLEANING.
The power supply plug configuration
designates whether your module uses a 120V
15 amp, 120V 20 amp or 220V 15 amp service.
Refer to the illustration on page 3 to identify
your plug.
CAUTION
IT IS IMPORTANT THAT ALL SAFETY
PRECAUTIONS PERTAINING TO THE
SERVICING OF ELECTRICAL DEVICES BE
OBSERVED AT ALL TIMES.
1. Dismantle your Electric Heating System module
for servicing per the following instructions.
NOTE: To replace the Thermostat Knob it is not
necessary to dismantle the module.
a. Make sure the power supply cord is not
plugged into an outlet. Be certain that the
module has cooled to a temperature safe
for handling.
b. Remove module by lifting and sliding the
module rearward. Lift the front of the module
and stand it vertically on the floor of the
cabinet. The control panel will be facing the
ceiling. Unplug the module from the power
supply cord and remove the module from
the cabinet.
c. Place the module on a dry, non-flammable
work surface.
CAUTION
IF NECESSARY TO RECONNECT POWER
WHILE SERVICING, PRACTICE EXTREME
CAUTION SO AS NOT TO RECEIVE AN
ELECTRICAL SHOCK FROM EXPOSED
COMPONENTS.
d. To replace the thermostat, switch or indicator
light, remove the four screws that hold the
control panel to the main body of the module to
gain access to the part needing replacement.
It will also be necessary to remove the cover
from the top of the module to gain access to
the terminal block. See diagram on page 9.
e. To replace the element or blower it is only
necessary to remove the (4) screws around
the perimeter of the module top and remove
the cover (carefully laying it to the side of the
module to prevent damage to the thermostat
capillary tube which is attached to the
module top).
NOTE: Retain all hardware for reassembly.
2. Refer to the Module Replacement Parts
Diagram to identify the internal components.
Determine malfunctioning component(s) by
electrical diagnostic procedures.
3. After servicing, be sure to verify the routing of
each wire with the wiring schematic on page
12 before installing electrical cover and
connecting module to power source. Be sure
that the thermostat sensor tube does not
contact any electrical connections.
4. Assemble components using the retained
hardware, making sure that no wires are
pinched between the cover and the component
chassis.
5. Install the module after plugging the pigtail into
the supply cord. For installation procedure,
reverse directions in step 1B above.
C. BATTERY REPLACEMENT OF TIMER
1. To replace the batteries remove the (6)
screws holding the bezel panel in place.
See item 19 page 6.
2. Pull the panel away from the door to gain
access to the back of the timer. See item
14 page 6.
3. Remove the battery door from the timer back
and replace with (1) AAA 1.5V battery and
install by matching the battery polarity with the
polarity noted in the battery compartment.
D. SWIVEL-LOCK CASTER SYSTEM
OPERATION
The casters that are controlled by the swivel-
lock mechanism are normally locked in the rigid
or “travel” position. Stepping on the swivel-lock
release loop allows the casters at that end of
the cabinet to rotate out of the rigid position
when the cabinet is moved in tight spaces or
around sharp corners, without dragging.
NOTE: You must Press down on the swivel-lock
release loop until the casters are out of the
rigid position.
When you remove your foot from the swivel-
lock release loop the casters will continue to
be free to swivel until the cabinet is pulled for a
distance from the opposite side and the casters
swivel back into the rigid or “travel” position.
8