Thermometer; Defrost Heater Thermostat; Defrost Heater Replacement - Hussmann HGL-1BS Installation And Service Instructions Manual

must be adjusted to the proper time of day
when the cabinet is started. The timer is ad-
justed by turning the knurled adjustment knob
in the center of the dial face counter-clockwise
until the time indicator corresponds with the
correct time of day. The defrost pins should be
checked for tightness. The timer the cabinet
has the lowest usage.will require readjusting
after a power failure or the cabinet supply is
turned off for extended periods of time. If an
additional defrost is required due to ambient or
cabinet usage conditions, do not put a defrost
during the middle of the day. Put any addi-
tional defrosts during the night or at a time
when the cabinet has the lowest usage.
Defrost is time initiated and temperature
terminated.
If the thermostat should fail, the timer is
equipped with a failsafe set at 40 minutes that
will allow defrost to terminate on time.
Thermometer –
The thermometer is located by looking
through the right hand door onto the right
hand end of the fan grill.
The Thermometer will also warm up
rather rapidly when the case door is held open
for a time such as when the case is being re-
stocked or a shopper is making a decision on a
product. After the door is closed it will take
some time for the thermometer to pull back
down to the case temperature. The thermome-
ter and temperature control sense discharge air
temp. which is 5-10° colder than the case tem-
perature.
The thermometer may be replaced by re-
moving the two screws holding it to the evapora-
tor fan grill. Lower the evaporator coil cover
by removing the brass screws located at the two
front corners of the cover, and backing out the
screws along the front edge of the cover holding
it to the grill. Follow the sensing lead to the cen-
ter rear of the evaporator coil. Loosen the clip
holding it to the bracket and slide the end of the
lead out.
When installing the new thermometer be
sure to run the lead of the new thermometer
through the hole in the fan grill first. Finish as-
sembly in reverse order. The same procedures
should be followed in the event you wish to clean
the end of the sensing lead.
Defrost Heater Thermostat –
The defrost heater thermostat is clamped
to the evaporator outlet tube. It is a bi-metal
thermostat that is tied in series with the evapora-
tor fans for a delay and with defrost time clock
solenoid to end defrost when the temperature
has been satisfied. The evaporator fans will not
come on until the thermostat senses 32° F and
defrost will terminate when the stat senses 58° F.
Defrost Heater Replacement –
The defrost heaters are firmly embedded
in the evaporator and held in place with spring
clips. To remove the heater, first remove all the
spring clips and pull the defective heater out of
the slots in the evaporator, starting at the wire
supply lead.
The replacement heater should be firmly
seated in the slots by using a small block of wood
and a mallet. After the new heater is in place,
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