Hussmann RMID, Инструкция по установке и эксплуатации

Страница: 6 / 38

IGIC-RMID-0109
6
2. From a refrigerant pressure temperature chart,
determine the saturation temperature at the
observed suction pressure.
3. Measure the temperature of the suction gas at the
thermostatic remote bulb location.
4. Subtract the saturation temperature obtained in step
No. 2 from the temperature measured in step No. 3.
3. The difference is superheat.
5. Set the superheat for 5
°
F - 7
°
F.
T-STAT LOCATION
T-Stats are located within the electrical raceway. Refer to
diagram below.
Figure 3-1
Tstat & Ballast
Tstat & Ballast
Electrical
WIRING COLOR CODE
G R E E N G RO U N D
P U R P L E A N T I - S W E AT
O R A N G E L I G H T S
Y E L L OW R E C E P TA C L E
R E D / B L A C K T- S TAT / S O L E N O I D 230V
BLACK / WHITE T- S TAT / S O L E N O I D 115V
B ROW N FAN MOTORS
CASE MUST BE GROUNDED
NOTE: Refer to label affixed to case to determine the actual
configuration as checked in the “TYPE INSTALLED” boxes.
ELECTRICAL CIRCUIT IDENTIFICATION
Standard lighting for all models will be full length fluores-
cent lamps located within the case at the top.
The switch controlling the lights, the plug provided for
digital scale, and the thermometer are located at the rear
of the case mullion.
The receptacle that is provided on the exterior back of
these models is intended for computerized scales with a
five amp maximum load, not for large motors or other
high wattage appliances. It should be wired to a dedicated
circuit.
ELECTRICAL SERVICE RECEPTACLES
(When Applicable)
The receptacles located on the exterior of the merchan-
diser are intended for scales and lighted displays. They
are not intended nor suitable for large motors or other
external appliances.
BEFORE
SERVICING
Always Disconnect Electrical
Power at the Main Disconnect
when servicing or replacing
any electrical component.
This includes (but not limited to) Fans,
Heaters, Thermostats, and Lights.
FIELD WIRING & SERIAL PLATE AMPERAGE
Field Wiring must be sized for component amperes
printed on the serial plate. Actual ampere draw may be
less than specified. Field wiring from the refrigeration
control panel to the merchandisers is required for re-
frigeration thermostats. Most component amperes are
listed in the “Case Specs” section, but always check the
serial plate.
BALLAST LOCATION
Ballasts are located within the access panel under the
case. Refer to diagram 3-1 on page 6.
User Information
STOCKING
Improper temperature and lighting will cause serious prod-
uct loss. Discoloration, dehydration and spoilage can be
controlled with proper use of the equipment and handling
of product. Product temperature should always be main-
tained at a constant and proper temperature. This means
that from the time the product is received, through stor-
age, preparation and display, the temperature of the prod-
uct must be controlled to maximize life of the product.
Hussmann cases were not designed to “heat up” or “cool
down” product—but rather to maintain an item’s proper
temperature for maximum shelf life. To achieve the pro-