Power Switches; Temperature Control; Electrical Enclosure; Defrost Time Clock - Hussmann HGL-1BS Installation And Service Instructions Manual

♦ A regular program should be set up for the
cleaning of the fin-and-tube condenser.
Normally, this cleaning is required every 3
to 4 months, but the individual store appli-
cation may shorten or lengthen this time pe-
riod. Dust and dirt accumulation can cause
serious efficiency loss. On BS cases (bottom
mounts) access is gained to the unit area by
removing the louvered grille. The unit
slides forward to facilitate cleaning and for
service. Care should be taken when pushing
the unit back in place to insure that the pull-
out coil does not become kinked or damaged
in some way.
Power Switches –
The power switch is located at the elec-
trical box, which is behind the top decorative
panel (TS models) or bottom louvered panel
(BS models). The switch will shut off all
power to the case.
Before any service is performed on this
piece of equipment, make sure the power sup-
ply to the cabinet is disconnected.
Temperature Control –
The electronic temperature control is
located in the electrical box. The temperature
control does not have an 'OFF' position. Ad-
justments may be made by turning the knob on
the face of the dial. Turning it counter clock-
wise will give colder temperatures. There is
also an adjustable temperature differential (the
difference between the cut-in temperature and
the cut-out temperature) located on the back of
the temperature control cover. When adjusting
the differential, the temperature setting may
also have to be adjusted.
The control has a range of –20° F to +100°F
with a differential of 1° to 30°. It is factory
set for approximately – 18° F with a 8° dif-
ferential. The temperature should be
checked with a thermometer other than the
case thermometer after it is running to in-
sure that the case is running at the proper
temperature for the product.
A picture of this Electronic Tempera-
ture Control board layout and terminal loca-
tion is at the back of this book.
Electrical Enclosure –
The electrical enclosure contains the
defrost time clock and temperature control.
For servicing convenience, access is gained
by removing the access panel and electrical
box cover. The cabinet supply breakers
should be disconnected before removing the
enclosure cover.
Defrost Time Clock –
The timer is factory pre-set for two
(2) defrost cycles per day at 6:00 a.m. and
10:00 p.m. with a 40 minute failsafe. The
timer
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