Hussmann IMPACT LWU User Manual

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P/N 0395741_J
Merchandisers
®
LWU
Technical Data Sheet
P/N 0395741_J
NSF
®
Certified
February 2007
Item Part # Description Wiring Item #
FAN ASSEMBLIES AND THERMOSTATS
A. 4W Fan Assembly (1)
0392457 Fan Motor, Standard (MO.4410101)
0409511 Front & Rear — Fan Blade
embossing toward motor (FB.0409511)
0409513 End Compartment — Fan Blade
embossing toward motor (FB.0409513)
B. Optional Adjustable Refrigeration Thermostat (2)
C. Defrost Termination Thermostat (3)
(Electric Defrost only)
0398557 Front & End Compartment
(CT.4440611)
0398558 Rear (CT.4481088)
D. 0425304 Heater Switch (4)
(Koolgas Defrost only) (CT.0425304)
H
EATERS
E. Modular Electric Defrost Heaters, 208V (5)
0395709 Parent (HE.4850409)
0406444 End Compartment (HE.4850478)
Item Part # Description Wiring Item #
H
EATERS (CONTINUED)
F. Drip Pan Heaters, Electric 208V (6)
0392412 90 inch case (HE.4850461)
0392413 138 inch case (HE.0392413)
0392412 End Compartment (HE.4850461)
F. Drip Pan Heaters, Koolgas 120V (7)
0421237 90 inch case (HE.4850495)
0421238 138 inch case (HE.4850496)
0421237 End Compartment (HE.4850495)
G. Nosing Anti-sweat Heaters (8)
0401603 90 inch case (Discharge)
(HE.4850470)
0401555 90 inch case (Return) (HE.4850465)
0401605 138 inch case (Discharge)
(HE.0401605)
0401557 138 inch case (Return) (HE.4850467)
0401612 End Compartment (Discharge)
(HE.0401612)
0401555 End Compartment (Return)
(HE.4850465)
©2007 HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
U.S. & CANADA 1-800-922-1919 • MEXICO 1-800-522-1900 • WWW.HUSSMANN.COM
We reserve the right to change or revise specifications
and product design in connection with any feature of
our products. Such changes do not entitle the buyer to
corresponding changes, improvements, additions or
replacements for equipment previously sold or shipped.
NOTE: Revision J corrects heater data on Page 4.

Hussmann IMPACT LWU Specifications

General

Application	Low Temperature
Refrigerant	R-404A
Cooling System	Remote
Lighting	LED
Defrost System	Electric
Case Lengths	4', 6', 8', 12'
Shelf Quantity	4
Temperature Range	0°F to -10°F
Interior Finish	White
Door Type	Glass
Shelving	Adjustable

Summary

Fan Assemblies and Thermostats

4W Fan Assembly

Defrost Termination Thermostat

Heaters

Modular Electric Defrost Heaters, 208V

Drip Pan Heaters, Electric 208V

Drip Pan Heaters, Koolgas 120V

Nosing Anti-sweat Heaters

Refrigeration Data

Discharge Air Temperature

Refrigeration discharge air temperatures for Frozen Food (FF) and Ice Cream (IC).

Evaporator Temperature

Evaporator temperatures for Frozen Food (FF) and Ice Cream (IC).

Unit Sizing Temperature

Unit sizing temperatures for Frozen Food (FF) and Ice Cream (IC).

Cooling Capacity (Btu/hr/case)

Cooling capacity in Btu/hr for parallel and conventional cases.

Defrost Data

Defrost Frequency

Defrost cycle frequency in hours for FF and IC models.

Defrost Water Production

Defrost water production rate in lb/case/day for FF and IC models.

Electric Defrost Parameters

Temperature Termination Point

Electric defrost temperature termination point for FF and IC models.

Failsafe Timer Duration

Electric defrost failsafe timer duration in minutes.

Standard Defrost Thermostat Settings

Thermostat Setpoints

Defrost thermostat setpoints for closing (rise) and opening (fall).

Conventional Controls

Low Pressure Backup Control

Low pressure backup control temperature setpoints for FF and IC.

Physical Data

NSF Certification

Standard Compliance

Electrical Data - Evaporator Fans

Evaporator Fan Amperage

Evaporator Fan Wattage

Electrical Data - Anti-Sweat Heaters

Nosing Anti-Sweat Heater Amperage

Nosing Anti-Sweat Heater Wattage

Electrical Data - Circuit Ampacity & Protection

Minimum Circuit Ampacity

Maximum Over Current Protection

Electrical Data - Defrost Heaters

Electric Defrost Heater Amperage

Amperage for electric defrost heaters by compartment and voltage.

Electric Defrost Heater Wattage

Wattage for electric defrost heaters by compartment and voltage.

Koolgas Drip Pan Heater Data

Electric Defrost Wiring Diagram

208V Defrost Heater Circuit

Wiring diagram for 208V power from defrost contactors to heaters.

Control Thermostat Connections

Gas Defrost Wiring Diagram

120V Fan and Anti-Sweat Heater Circuit

Wiring diagram for 120V power to fans and nosing anti-sweat heaters.

120V Drip Pan Heater and Switch Circuit

Refrigeration Thermostat Connection