Lighting Door Switches; Door And Frame Heaters; Expansion Valve Adjustment; Alarm Thermostat (Heater Delay) - Hussmann HGL-1BS Installation And Service Instructions Manual

LIGHTING –
Interior lighting is provided by
electronically powered T-8 lamps located
inside each doorway. The tubes are en-
closed in a patented lens system to main-
tain proper heat around the bulb for
maximum, light intensity and to protect
the product in case of breakage. See the
Anthony "ELS" instructions for lens re-
moval, attached at the back of this book-
let.
Each HGL model has a convenient
ON/OFF switch so lights may be turned
off to conserve energy during hours when
the store is closed. The switch is located
inside the cabinet above the left hand
door. This switch only controls the lights.
208-230 volt power must be shut off at the
main power supply source located within
the store prior to starting any service or
maintenance work.
Light ballasts are located in the
mullions of the door frames. See the An-
thony ballast removal instructions at the
back of this installation booklet.
DOOR SWITCHES –
The switches at the top of the door-
ways operate the evaporator fan motors.
These switches stop the fan motors when
the doors are open.
DOOR FRAME HEATERS –
This cabinet is equipped with both
frame and door heaters. These are ther-
mostatically controlled and will not come
on until the cabinet is at operating tem-
perature. See door mfg. instructions for
heater replacement at the back of this
booklet
ALARM THERMOSTAT
The alarm (heater delay) thermo-
stat is located on the top of the inner liner
in the upper right hand corner behind the
evaporator. The thermostat will not turn
the heaters on until it senses 0º and in
turn will turn the heaters off when its
senses +18º F. This is so that unwanted
heat will not be added to the case during
defrost or if the case refrigeration system
fails.
EXPANSION VALVE ADJUSTMENT –
Expansion valve must be adjusted
to fully feed the evaporator. Before at-
tempting to adjust the valve make sure
the evaporator is either clean or only
lightly covered with frost, and that the
cabinet is within 10º of its expected opera-
tion temperature. Adjust the expansion
valve as follows:
Attach two sensing probes to the
evaporator, one under the clamp holding
the expansion valve sensing bulb and the
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(Heater Delay)