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Food Service Technology Center

Jackson Crew 44 Dishwashing Machine Appliance Test Report FSTC Report # 501311156

Application of ASTM

Standard Test Methods F1920-11

December 2012

Prepared by: Denis Livchak Fisher-Nickel, Inc.

Prepared for: Pacific Gas & Electric Company

Customer Energy Efficiency Programs PO Box 770000

San Francisco, California 94177

Fisher-Nickel, Inc. All rights reserved. 2012

Jackson Crew 44

Appliance Test Report

Food Service Technology Center Report # 501311156 2

Food Service Technology Center Background

The information in this report is based on data generated at the PG&E Food Service Technology Center (FSTC). Dedicated to the advancement of

the foodservice industry, The FSTC has focused on the development of standard test methods for commercial foodservice equipment since 1987.

The primary component of the FSTC is a 10,000 square-foot appliance laboratory equipped with energy monitoring and data acquisition hardware,

60 linear feet of canopy exhaust hoods integrated with utility distribution systems, appliance setup and storage areas, and a state-of-the-art demon-

stration and training facility.

The FSTC Energy Efficiency for Foodservice Program is funded by California utility customers and administered by Pacific Gas & Electric Company

(PG&E) under the auspices of the California Public Utilities Commission. California consumers are not obligated to purchase any full service or other

service not funded by the program.

Policy on the Use of Food Service Technology Center Test Results and Other Related Information Fisher-Nickel, Inc. and the FSTC do not endorse particular products or services from any specific manufacturer or service provider.

The FSTC is strongly committed to testing foodservice equipment using the best available scientific techniques and instrumentation.

The FSTC is neutral as to fuel and energy source. It does not, in any way, encourage or promote the use of any fuel or energy source nor does it

endorse any of the equipment tested at the FSTC.

FSTC test results are made available to the general public through technical research reports and publications and are protected under U.S. and

international copyright laws.

In the event that FSTC data are to be reported, quoted, or referred to in any way in publications, papers, brochures, advertising, or any other pub-

licly available documents, the rules of copyright must be strictly followed, including written permission from Fisher-Nickel, Inc. in advance and proper

attribution to Fisher-Nickel, Inc. and the FSTC. In any such publication, sufficient text must be excerpted or quoted so as to give full and fair repre-

sentation of findings as reported in the original documentation from FSTC.

Disclaimer

Neither Fisher-Nickel, Inc. nor the FSTC nor any of its employees makes any warranty, expressed or implied, or assumes any legal liability of re-

sponsibility for the accuracy, completeness, or usefulness of any data, information, method, product or process disclosed in this document, or repre-

sents that its use will not infringe any privately-owned rights, including but not limited to, patents, trademarks, or copyrights.

Reference to specific products or manufacturers is not an endorsement of that product or manufacturer by Fisher-Nickel, Inc., the FSTC, or PG&E. In

no event will Fisher-Nickel, Inc. or PG&E be liable for any special, incidental, consequential, indirect, or similar damages, including but not limited to

lost profits, lost market share, lost savings, lost data, increased cost of production, or any other damages arising out of the use of the data or the

interpretation of the data presented in this report.

Retention of this consulting firm by PG&E to develop this report does not constitute endorsement by PG&E for any work performed other than that

specified in the scope of this project.

Legal Notice This report was prepared as a result of work sponsored by the California Public Utilities Commission (Commission). It does not necessarily represent

the views of the Commission, its employees, or the State of California. The Commission, the State of California, its employees, contractors, and

subcontractors make no warranty, express or implied, and assume no legal liability for the information in this report; nor does any party represent

that the use of this information will not infringe upon privately owned rights. This report has not been approved or disapproved by the Commission

nor has the Commission passed upon the accuracy or adequacy of the information in this report.

Revision History

Revision num. Date Description Author(s)

0 September 2012 Initial release Denis Livchak

Jackson Crew 44



Contents

Page

Executive Summary ....................................................................................................................................... 5

Introduction .................................................................................................................................................... 6

Background .................................................................................................................................................. 6

Objectives .................................................................................................................................................... 6

Appliance Description .................................................................................................................................. 7

Methods and Results ..................................................................................................................................... 8

Setup and Instrumentation ........................................................................................................................... 8

Measured Energy and Water Pressure Test ................................................................................................ 9

Preheat and Idle Tests ................................................................................................................................. 9

Washing Tests ............................................................................................................................................. 11

Energy Cost Model ...................................................................................................................................... 12

References ..................................................................................................................................................... 14

Appendix A: Glossary of Terms ................................................................................................................... 15

Appendix B: Appliance Specifications ........................................................................................................ 17

Report Certification ....................................................................................................................................... 20

Jackson Crew 44



Figures

Page

1 Jackson Crew 44 Conveyor Dishwashing Machine ................................................................................... 5

2 Jackson Crew 44 Washing Cavity: Upper and Lower Wash Arms and the Conveyor Belt .......................... 7

3 Jackson Crew 44 Dishwashing Machine Ventilation Setup in the Lab ...................................................... 8

4 Water Pressure set at 15 psi during the Rinse Cycle ................................................................................ 9

5 Water Pressure set at 20 psi during the Rinse Cycle ................................................................................ 9

6 Installed thermocouple relative to the factory tank temperature probe inside the Crew 44 wash tank ...... 10

7 Tank Thermostat Factory Setting .............................................................................................................. 11

8 Adjusted Thermostat Setting ...................................................................................................................... 11

9 Jackson Crew 44 Dishwashing Machine Wash Tank Temperature Test Profile ....................................... 12

Tables

Page

1 Summary of Jackson Crew 44 Conveyor Dishwashing Machine Performance ............................................. 5

2 Jackson Crew 44 Appliance Specifications ...................................................................................................... 7

3 Testing Equipment Inventory ............................................................................................................................ 8

4 Input, Preheat, and Idle Test Results for the Jackson Crew 44 Dishwashing Machine .................................... 11

5 Jackson Crew 44 Dishwashing Machine Washing Energy Rate and Cycle Rate Test Results ........................ 12

6 Jackson Crew 44 Conveyor Dishwasher Estimated Energy Consumption and Cost ........................................ 13

Jackson Crew 44



Executive Summary

Conveyor dishwashing machines have become common appli-

ances in medium to large commercial kitchens. As one of the

biggest consumers of hot water and electricity, conveyor-type

dishwashing machines have become a major contributor to the

total restaurant energy usage.

The Jackson Crew 44 shown in Figure 1 is a 44 inch conveyor

electric dishwashing machine with an internal booster heater us-

ing a hot water supply. To determine dishwashing machine per-

formance, FSTC engineers used ASTM F1920-11 Standard Test

Method for Performance of Rack Conveyor, Commercial Dish-

washing Machines1 Dishwashing machine performance is char-

acterized by preheat and idle energy consumption rate, washing

energy and water rate per rack and heavy load cycle rate. Wash-

ing energy rate and cycle rate were determined by washing racks

of ten plates in succession while maintaining the required mini-

mum wash tank temperature. The Jackson Crew 44 dishwashing

machine achieved a washing energy rate of 375 wh/rack

while washing 48.7 racks per hour with incoming hot water;

the idle energy rate was 2.33 kW. A summary of the test re-

sults is presented in Table 1.

Table 1: Summary of Jackson Crew 44 Conveyor Dishwashing Machine Performance

Rated Input (kW) 34.7

Measured Maximum Energy Rate (kW) 35.7

Fill and Preheat Time (min) 15.25

Preheat Energy Consumption (kWh) 2.99

Idle Energy Rate (kW) 2.33

Washing and Booster Energy Rate (kW) 18.26

Washing and Booster Energy Rate (Wh/rack) 375

Washing Water Consumption (gal/rack) 0.44

Heavy-Load Cycle Rate (racks/hr) 48.7

1 American Society for Testing and Materials. 2011. Standard Test Method for Performance Rack Conveyor, Commercial Dishwash-

ing Machines. ASTM Designation F1920-11, in Annual Book of ASTM Standards, West Conshohocken, PA.

Figure 1: Jackson Crew 44 Conveyor Dishwashing Machine

Jackson Crew 44



Introduction

Background

Rack conveyor dishwashing machines have become a necessity in today’s non-quick service, high-production

commercial kitchens. These machines are able to wash and sanitize various types of wares and utensils, con-

sistently at a high volume, while having a small footprint relative to flight type dishwashing machines. Dish-

washing machine contribution to the total restaurant energy consumption is significant. A built –in electric

booster heater is often needed to preheat large volumes of water to help reach required sanitation temperatures.

The ASTM designation ASTM F1920-11 Standard Test Method for Performance of Rack Conveyor, Com-

mercial Dishwashing Machines characterizes dishwashing machine performance by evaluating its energy and

water consumption, heavy load washing cycle rate and idle energy rate. ASTM appliance performance can be

used to estimate an appliance’s contribution to the energy consumption of an end-user’s kitchen.

The glossary in Appendix A is provided so that the reader has a reference to the terms used in this report.

Objectives

The objective of this report is to examine the operation and performance of the Jackson Crew 44 conveyor-

type dishwashing machine under the controlled conditions of the ASTM designation F1920-11 Standard Test

Method for Performance of Rack Conveyor, Commercial Dishwashing Machines. The scope of this testing is

as follows:

1. Verify that the appliance is operating at the manufacturers’ rated energy input.

2. Verify that the appliance is operating at the NSF’s rated water consumption rate.

3. Determine the time and energy required to fill and preheat the dishwashing machine from 140F

water temperature to minimal operational wash tank temperature and until the tank heater ele-

ments cycle off.

4. Characterize the dishwashing machine’s idle energy use.

5. Determine the dishwashing machine’s washing energy rate under a specified ASTM dish loading

scenario.

6. Determine the dishwashing machine’s heavy load cycle rate for the ASTM dish loading scenario

while maintaining minimum wash tank temperature.

Jackson Crew 44



Appliance Description

The Jackson Crew 44 is an electric 44-inch long conveyor dishwashing machine with a rated total input rate of

34.7 kW and a wash tank capacity of 35.6 gallons. The dishwashing machine features a built in electric booster

heater designed for a 70F rise rated at 17.3 kW and an electric resistance heating element inside the wash tank

rated at 15 kW. The dishwasher and the booster heater require separate 208 volt electrical wiring. The 3hp

motor circulates the water during the wash cycle through two nozzle sections located above and below the belt

(Figure 2). The conveyor belt operating at 6.1 feet per minute is powered by a ¼ hp motor and is automatical-

ly triggered by the entrance of the dish rack into

the wash cavity. The front panel of the dishwash-

ing machine provides a digital readout indicating

the temperature of the wash tank and the rinse

water. There is a mechanical gauge indicating the

rinse water pressure. The dishwashing machine

has a single ½ ” water connection requiring mini-

mum water temperature of 110°F. Dishwasher

specifications are listed in Table 2.

Table 2: Jackson Crew 44 Appliance Specifications

Appliance Conveyor-type Dishwashing Machine

Manufacturer Jackson

Model Crew 44

Serial Number 11l268044

Generic Appliance Type Conveyor Dishwashing Machine

Total Rated Input

Booster Input

Minimum Rated Wash Pressure

Specified Wash Tank Volume

34.7 kW

17.3 kW

15 psi

35.6 gal

Operating Voltage

Minimum Rated Wash Temperature

Minimum Rinse Temperature

208 V

160 F

180 F

Controls On/Off; Manual Tank Temperature Adjustment

Construction Stainless steel

Washing Cavity Dimensions (W x D x H) 21" x 44" x 19.75”

External Dimensions (W x D x H) 27" x 64" x 65.75"

Figure 2: Jackson Crew 44 Washing Cavity: Upper and Lower Wash Arms and the Conveyor Belt

Jackson Crew 44



Methods and Results

Setup and Instrumentation

FSTC researchers installed the dishwashing machine in a large

conditioned lab space. The dishwashing machine was placed on

the floor with a two feet rear clearance to allow for electrical

connections. The rack inlet and outlet of the dishwashing ma-

chine were ducted and connected to a vent fan to exhaust the

steam of the machine outside the lab (Figure 3). The louvers for

the inlet and outlet of the machine were balanced to exhaust 200

cfm per side. The floor-drain was connected to the machine by 1

– ½ “ PVC pipe. Two end tables, each measuring 3 foot were

provided by the manufacturer attached to both ends of the dish-

washing machine to load and unload the dishwasher.

The Jackson Crew 44 dishwashing machine was installed in ac-

cordance with the manufacturer’s instructions in a conditioned

test space. The room was maintained at an ambient condition of

75 ± 5°F during testing. Supply air was provided at very low

velocity in order not to disturb the machine’s airflow. Dish-

washing machine energy and water consumption were measured

with equipment listed in Table 3.

Table 3: Testing Equipment Inventory

Description / ID Manufacturer Model Measurement

Range

Resolu-

tion

Calibration Date Next Cali-

bration

electric meter / ALC 301 Shark FTB4705 0.2 A – 50.0 A 7.50 Wh 12/10/11 12/10/12

electric meter / ALD 401 Shark FTB4705 0.4 A – 100.0 A 15.00 Wh 12/10/11 12/10/12

Water Meter / SN: 150606

Omega 4605 0 – 13 GPM 0.0066 gal (Verified Internally)

4/17/2012

NA

Submerged Type K thermocouples were used to measure the incoming water supply, wash tank and rinse wa-

ter temperatures on the Jackson Crew 44 dishwashing machine. Wash tank, pump electric energy, and control

electric energy were measured using a three-phase current transducer meter. The booster heater energy was

Figure 3: Jackson Crew 44 Dishwashing Machine Ventilation Setup in the Lab

Jackson Crew 44



measured using a separate three-phase current transducer meter. The dishwashing machine’s water consump-

tion was measured using a calibrated mechanical paddle wheel style water meter with a digital pulse output.

The energy transducers, water meter and thermocouple probes were connected to a computerized data acquisi-

tion unit that recorded data at 5 second intervals.

Measured Energy and Water Pressure Test

Rated energy input rate is the maximum or peak rate at which the dishwashing machine consumes energy as

specified on the manufacturer’s nameplate. Measured energy input rate is the maximum or peak rate of energy

consumption, which is recorded during a period when the heating elements are fully energized in the booster

heater and the tank heater (i.e. the rinse cycle). Prior to testing, the energy input rate was determined by meas-

uring the energy consumed from initial operation of the booster heater until cycle completion. This procedure

ensures that the dishwashing machine was operating within its specified parameters. The measured energy in-

put rate of the dishwashing machine was 17.74 kW and the input rate of the booster heater was 18.0 kW. The

energy consumption was within 2% from the full nameplate rating of the dishwashing machine and 4% from

the booster heater nameplate rating. The rinse pressure of the rack conveyor dishwashing machine was adjust-

ed and tested at 15 and 20 psi. The internal water pressure regulator was adjusted in order to achieve the pres-

sure required in the test method (Figure 4 and 5). Table 3 summarizes the results from the energy input test.

Figure 4: Water Pressure set at 15 psi during the Rinse Cycle

Figure 5: Water Pressure set at 20 psi during the Rinse Cycle

Preheat and Idle Tests

Jackson Crew 44



These tests show how the dishwashing machine uses energy

when it is not washing dishes, but ready to wash. The preheat

test was conducted at the beginning of a test day after the dish-

washing machine was stabilized at room temperature overnight

and filled with 140°F water. The preheat test also includes the

time it takes for the wash tank to fill with water, and the tank

heater elements do not turn on until the elements are fully sub-

merged. The preheat test recorded the time and energy required

for the machine to reach minimum wash tank temperature of

160°F and also until the tank elements cycle off. The tank tem-

perature was monitored right next to the factory thermocouple

located approximately one inch from the bottom (Figure 6).

Data recording began when the dishwashing machine was first

turned on, any time delay before the powering of the elements

was included in the test. The tank was filled with 32.8 gallons of

140°F hot water over a period of 4.58 minutes and the tank heat-

er elements energized 3.83 minutes into the fill after 27.6 gallons

of water were in the tank. The booster heater consumed 750 Wh

of electrical energy during the first 2.67 minutes of the tank fill.

After coming into contact with the room temperature dishwasher,

the 140F incoming fill hot water cooled down to 132°F inside the

tank. During the preheat test, the dishwashing machine reached the minimum tank temperature of 160°F in

10.67 minutes while consuming 2558 Wh of electrical energy. It took 14.17 minutes for the dishwasher heater

elements to cycle off when the tank temperature reached 171°F consuming a total of 2708 Wh. Idle energy rate

represents the energy required to maintain the manufacturer’s set point temperature, which is equivalent to the

appliance’s standby losses. After the dishwashing machine was preheated, it was allowed to stabilize for a

minimum of one hour. Time and energy consumption were monitored for an additional three-hour period while

maintaining an operational average temperature of 172°F inside the wash tank. The idle energy rate while

maintaining a ready-to-wash state was 2.22 kW for the tank heaters and 0.11 kW for the booster heater. The

input, preheat and idle performance of the dishwashing machine is listed in Table 4.

Figure 6: Installed thermocouple relative to the factory tank temperature probe in-side the Crew 44 wash tank

Jackson Crew 44



Table 4: Input, Preheat, and Idle Test Results for the Jackson Crew 44 Dishwashing Machine

Rated Dishwasher Energy Input Rate (kW) 15+2.2+0.2

Measured Dishwasher Energy Input Rate (kW) 17.74

Percentage Difference (%) 1.84

Rated Booster Heater Energy Input Rate (kW) 17.3

Measured Booster Heater Energy Input Rate (kW) 18.0

Percentage Difference (%) 4.05

Preheat Duration (min) 14.17

Preheat Tank Heater Energy Consumption (Wh) 1958

Preheat Booster Heater Energy Consumption (Wh) 750

Total Electric Preheat Energy Consumption (Wh) 2708

Preheat Temperature at location (°F) 171

Idle Tank Heater Energy Rate (kW) 2.22

Idle Booster Heater Energy Rate (kW) 0.11

Total Electric Idle Energy Rate (kW) 2.33

Average Idle Temperature at location (°F) 172

Washing Tests

Standard dish racks weighing 4.1 lbs were used for this test and were loaded with 10, 1.35 lb plates evenly

spaced. The dishwasher was stabilized by running empty racks for a period of 5 minutes, and then was allowed

to recover until the elements cycled off at 173°F tank temperature. The washing test consisted of washing five

racks loaded with 10 dishes back to back allowing the dishwasher to recover after each set of five racks until

tank elements cycled off. The next set of 5 racks was loaded onto the machine as soon as the tank heater ele-

ments cycled off. A total of 6 sets of 5 racks were washed and the first set was discarded for stabilization, re-

sulting in 25 racks (5 sets of 5 racks) of dishes used for the washing test. The tank temperature was maintained

above 160°F throughout the entire test by adjusting the thermostat from the factory setting as shown in figure 7

and 8. Rinse temperature was held above 180°F during each rinse cycle. Figure 9 shows the wash tank tem-

perature profile during the entire test.

Figure 7: Tank Thermostat Factory Setting Figure 8: Adjusted Thermostat Setting

Jackson Crew 44



Figure 9: Jackson Crew 44 Dishwashing Machine Wash Tank Temperature Test Profile

The total dishwasher energy, booster heater energy and water consumption was recorded for each test run. The

dishwasher was tested at 15psi rinse pressure as advised by the manufacturer as well as 20psi rinse pressure.

The Jackson Crew 44 dishwashing machine demonstrated an average washing energy rate of 15.64 kW

throughout the entire test. The booster heater average energy rate was 2.62 kW due to the fact that it operated

at full power only during the rinse cycle of the machine, which took up a small fraction of the total test time.

The heavy load cycle rate for the machine was 48.7 racks per hour. The Jackson Crew 44 dishwashing ma-

chine recovered to 172°F before the elements cycled off. Gas water heating energy was calculated for hot wa-

ter supply machines to bring up the water volume used for the washing test from 60°F to 140°F at 65% water

heater efficiency. The wash test results are summarized in Table 6.

Table 6: Jackson Crew 44 Dishwashing Machine Washing Energy Rate and Cycle Rate Test Results

Rinse Pressure (psi) 15 20

Washing Energy Rate (kW) 15.64 15.25

Booster Energy Rate (kW) 2.62 2.87

Washing Tank Energy Rate (Wh/rack) 321 320

Booster Heater Energy Rate (Wh/rack) 54 60

Gas Water Heating Energy (Btu/rack) 452 482

Total Electric Washing Energy Rate (Wh/rack) 375 380

Washing Water Consumption (gal/rack) 0.44 0.47

Average Supply Water Temperature (F) 142 141

Average Rinse Water Temperature (F) 188 188

Minimum Tank Temperature (F) 160 161

Heavy Load Cycle Rate (racks/hr) 48.7 47.7

156

158

160

162

164

166

168

170

172

174

0 10 20 30 40 50

Was

h T

ank

Tem

pe

ratu

re (

F)

Test Time (min)

5 minute stabilization First Stabilization Set 5 test run sets

Jackson Crew 44



Energy Cost Model

The test results can be used to estimate the annual energy consumption for the Jackson Crew 44 conveyor type

dishwashing machine in a real-world operation. A simple cost model was developed to calculate the relation-

ship between the various cost components (e.g., preheat, idle, water heating and washing costs) and the annual

operating cost, using the ASTM test data (see Equations 1 and 2 below). Any chemical costs such as detergent

are not included in these calculations. Water heating costs are estimated assuming 65% gas water heater effi-

ciency and 80°F temperature rise using Equation 3.

Eelec,daily = Eelec,h +Eelec, i +np ´Eelec, p (Equation 1)

helecq ,h elec,

PC

W =E

60PC

W =E , ielec,

pponielec

tntq

Eelec,daily = W

PC´ qelec, h + qelec, i ´ ton -

W

PC-

np ´ tp

60

æ

èç

ö

ø÷+np ´Eelec, p (Equation 2)

65.0/08*GPR*W*8.29 =E daily heating, water gas (Equation 3)

Where:

Eelec,daily = Daily energy consumption

W = Number of racks washed per day

PC = Heavy Load Cycle Rate

qelec,h = Washing energy rate

qelec,i = Idle energy rate

ton = Total time the appliance is on per day

np = Number of preheats per day

tp = Duration of preheat

Eelec,p = Preheat energy

Eelec,h = Heavy-load cooking energy

Eelec,i = Idle energy

GPR = Gallons Per Rack

The model is based on a large full service restaurant, washing 400 racks of dishes over a 14-hour day, one

preheat per day, 364 days per year (allowing for 1 holiday per year). HVAC and ventilation costs are not in-

Jackson Crew 44



cluded in this model. Table 7 summarizes the annual electric and gas water heating energy consumption and

associated energy cost for the dishwashing machine.

Table 7: Jackson Crew 44 Conveyor Dishwasher Estimated Energy Consumption and Cost

Preheat Energy (kWh/day) 2.71

Idle Energy (kWh/day) 12.89

Washing Energy (kWh/day) 150.0

Water Heating Energy (kBtu/day) 191.8

Annual Electric Energy (kWh/year) 60,278

Annual Gas Water Heating Energy (therms/year) 698

Annual Cost ($/year)a 9,740

a Dishwashing energy costs are based on $0.15/kWh and $1.00/therm

Jackson Crew 44



References

1. American Society for Testing and Materials, 2011. Standard Test Method for Performance of Rack Con-

veyor, Commercial Dishwashing Machines. ASTM Designation F1920-11, in Annual Book of ASTM

Standards, West Conshohocken, PA.

Jackson Crew 44



Appendix A: Glossary of Terms

CFM

Volumetric flow rate - Cubic Feet per Minute

Convection (kW or Btu/h)

The rate of thermal energy transfer between air in motion and a

bounding surface when the two are at different temperatures.

Cooking Energy (Btu, kWh)

The total energy consumed by an appliance as it is used to

cook a food product under specified test conditions.

Cooking Energy Rate (kW, Btu/h, or kBtu/h)

Average rate of energy consumption, in hours, during a cook-

ing test.

Cycle Rate (racks/h)

Maximum rate, racks per hour, at which a dishwasher can

wash and sanitize in groups of 5 racks while maintaining a

minimum tank temperature above 160F.

FPM

Velocity – Feet Per Minute

HVAC

Heating Ventilation and Air Conditioning.

Set Point (°F)

Targeted temperature set by appliance controls.

Test Method

A definitive procedure for the identification, measurement and

evaluation of one or more qualities, characteristics, or proper-

ties of a material, product system, or service that produces a

test result.

Typical Day

A sample day of average appliance usage based on observa-

tions and/or operator interviews. Used to develop an energy

cost model for an appliance.

Uncertainty

Measure of systematic and precision errors in specified instru-

mentation, or measure of repeatability of a reported test result.

Idle Temperature (°F)

The temperature of the tank (either selected by the appliance

operator or specified for a controlled test) that is maintained by

the appliance under an idle condition.

Idle Energy Rate (kW or Btu/h)

The rate of energy consumption by an appliance per hour

while it is “holding” or maintaining a stabilized operating

condition or temperature.

Measured Energy Input Rate (kW, Btu/h, or kBtu/h)

The peak rate at which an appliance will consume energy,

typically measured during preheat (i.e. the period of operation

when all burners or elements are “on”). Does not include

energy used for appliance controls.

Plug Load

The power requirement of an appliance, usually measured at

the plug.

Preheat Energy (kWh, Wh or Btu)

The total amount of energy consumed by an appliance during

the preheat period (from ambient temperature to the specified

thermostat set point).

Preheat Energy Rate (°F/min)

The rate, in degrees Fahrenheit per minute, at which the ap-

pliance increases temperature during preheat.

Preheat Time (min)

The time required for an appliance to heat from the ambient

room temperature (75 ± 5°F) to a specified (and calibrated)

operating temperature or thermostat set point.

Production Capacity (lb/h)

Maximum rate, in pounds per hour, at which an appliance can

bring a specified product to a specified “washed” condition.

Radiation (kW or Btu/h)

The rate of thermal energy emitted by a surface dependent on

its temperature and emissivity.

Rated Energy Input Rate (kW, W or Btu/h)

Maximum or peak rate at which an appliance consumes ener-

gy, as rated by manufacturer and specified on the nameplate.

.

Jackson Crew 44



Appendix B: Appliance Specifications

Jackson Crew 44




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