Sizing and Planning a Laundry 16015 - Direct Machinery

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SIZING AND PLANNING A LAUNDRY

TABLE OF CONTENTS

SECTION 1 BASIC INFORMATION

Machine nomenclature Cylinder volume Load factor "G" forces

"G" forces Moisture retention

Water pressure Estimated peak water flow rates

Proper piping size Conversion factors Water hardness How to size a water softener

Sizing drain troughs Fuel-Unit of measure Natural gas

Calculating natural gas required to heat water Sizing a water heater LP gas Butane No. 2 (diesel) oil No. 6 (bunker) oil

Boiler horsepower Steam pressure Sizing a boiler

Electricity Motor full load currents charts

Electricity Linen cart capacity chart

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SECTION 2 SPACE ALLOCATION

Laundry space allocation

SECTION 3 LINEN ARTICLES WEIGHTS

Typical linen items and weights Weight of textile rental items

SECTION 4 LAUNDRY TASK INFORMATION FORMS

Hotel/Motel Prison Nursing Home Hospital

SECTION 5 SIZING WASHROOM EQUIPMENT

Guidelines for sizing wash room equipment Defining the task Hotel/Motel Nursing Home

Nursing Home Hospital Prison

Prison Division of work

Sizing washroom equipment 1-Washer-Extractors

2-Batch washers 3-Automatic batch dryer sizing

SECTION 6 FUNDAMENTAL WASH CHEMISTRY

Water Washing chemicals Surfactants

Alkalies Bleaches Finishing chemicals Antichlor Sours

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SECTION 6 FUNDAMENTAL WASH CHEMISTRY

Fabric softeners Sizing Wash steps Flushes Break Bleach suds Rinsing Temperature Number of rinse baths Dilution Antichlors Sour baths Extraction

SECTION 7 CONVERSION TABLES

Tables

SECTION 8 WATER CHARTS

Data Sheets by Model Number

SECTION 9 TERMINOLOGY

Glossary of textile items used by LSAA

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BASIC INFORMATION

NOMENCLATURE 42044 Washer Extractor First 2 digits (42) = Cylinder Diameter (inches) Last 2 digits (44) = Cylinder Depth (inches) Note: Other American Manufacturers use the same format

CYLINDER VOLUME

Formula: CDI = Cylinder Diameter in inches Cd = Cylinder depth in inches

CDI * CDI * cd CYLINDER VOLUME ( ft 3) 2,200

42" Diameter * 42" Diameter * 44" Depth 35.28 ft 3 2,200

LOAD FACTOR

Formula: CWGW = Clean Weight of Goods in Washer (lbs) CV= Cylinder Volume (ft3)

CWGW Load Factor CV

Example: 42044WP2 Washer Extractor Load Size = 200 lbs 42044WP2 Washer Extractor Cylinder Volume = 35.28 ft3.

200 Pound Load 5.66 Pounds per Ft 3. 35.28 Cu Ft

Note:

1. A generally accepted load factor (lbs of Linen/ft3 of Cylinder Volume) is between 5.50 to 6.50 lbs.

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2. High bulk goods, like the new micro denier fabric for surgical items, require the machine to be under loaded to 65% of its capacity.

3. Dense goods, like walk-on-mats permit the overloading of the machine by 30%.

"G" FORCES

DEFINITION: A Measure of Extraction's Efficiency to Remove Water.

Formula:

CRPM=Cylinder Revolutions per minute CD = Cylinder Diameter (Expressed in inches)

CRPM *CRPM *CD "G" FORCES 70,500

Example:

42044 WP2 with 700 RPM Final Extract Speed 42" Cylinder Diameter

700 RPM *700 RPM * 42" Diameter 292 "G' s" 70,500

Note:

1. The higher the "G" force, the greater the centrifugal force exerted on the goods. 2. One "G" equals 1 times the force of gravity. 3. Other factors which may affect Extraction are:

**Final bath temperature **Final bath chemicals **Length of extraction time **Type of goods (towels/sheets) **Ambient air humidity **% of cylinder open area to close area **Size of basket perforations **Type of material (cotton, 50/50) **Thickness of the load **Altitude of installation

WATER

MOISTURE RETENTION:

The amount of water contained in the linens after the final extraction. Expressed as a % of the dry weight of the goods being washed.

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NOTE:

MOISTURE RETENTION: Formula:

Example:

The DIN (German Industrial Norm, the equivalent of our American Standard Association) method adds 5% to the weight of dry textiles to account for the ambient humidity. This method assumes that goods that have been dried will, when allowed to sit on a shelf, absorb 5% of their bone dry weight.

American Norm (Bone dry method) WGAX = Weight of Goods after extraction DWG: Dry weight of goods

((WGAX DWG) *100) % Moisture retention DWG

42044 WP2 Washer Extractor 310 lbs = Weight of goods after extraction 200 lbs = dry weight of goods

((310 200) *100) 55% Moisture retention 200

Formula:

European Norm (DIN Method)

WGAX = Weight of goods after extraction DWG5 = Dry weight of goods plus 5% of its weight

((WGAX DWG5) *100) % Moisture retention DWG5

Example:

42044 WP2 Washer Extractor 310 lbs = Weight of goods after extraction 10 lbs = 5% of 200 lbs of Dry Weight

((310 (200 10)) *100) 47.62% Moisture retention (200 10)

200 lbs = Dry weight of goods

WATER PRESSURE:

The recommended water pressure is a range of 40 psi to 60 psi. Below 40, the washer extractor has to wait too long to fill. Above 60, there is the possibility of water hammer.

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