Yellow Jacket 69075 Operating Manual

Using microns and a deep vacuum for extra profits Specifications

Why should you care
about Microns?

The answer is simple - if you’re not

pulling a deep vacuum to the low micron

range, the risk of in-warranty failures

and no-charge call backs increases. And

only an electronic gauge is accurate

enough to show when you reach the

necessary micron range suggested by the

system manufacturer.

Why 15 microns or better?

During new system set-up, protective

caps are removed admitting moisture

and air into system components. If air

and moisture remain in the system, they

collect on the high side reducing system

efficiency. This causes a rise in head

pressure. The discharge valve gets hotter

than normal and organic solids form

causing compressor failure.

Moisture in the system can form ice

droplets which close off openings in

expansion valves and cap tubes, and

prevent continuous cooling. Ultimately

moisture, air and heat can produce acids

and sludge which could cause failures.

During service and parts replacement,

the same contaminants can get in again,

and you could be called back for repairs

by a dissatisfied customer.

Moisture and air can even enter through

system leaks. And as the moisture in air

increases, so does the amount of

contamination. The higher the humidity,

the bigger your problem.

3

A vacuum pump pulls air, moisture and

other contaminants out of the system

before the system is damaged. The

deeper and more complete the vacuum,

the more moisture is removed. That’s

why the YELLOW JACKET®

SuperEvac™ pump is engineered for

deep vacuums of 15 microns or better.

The purpose of manometers
and built-in pump gauges

Manometers provide approximate

readings in inches of mercury. It’s a start

and better than a mechanical gauge for

measuring vacuum but cannot provide

the readings necessary to assure you of

having reached the desired vacuum.

2000 microns, for example, is equivalent

to less than 0.1” of mercury which

would not be readily noticeable on the

manometer or mechanical gauge.

YELLOW JACKET pumps feature a

built-in indicator gauge to monitor

evacuation. When the indicator is in the

green (29” - 30”) range, the gauge is

telling you to

turn on the

YELLOW

JACKET

LCD Vacuum

Gauge for the

more accurate

readings in

the micron

gauge. The LCD reading gives you the

assurance of knowing that the

system is safeguarded with a deep

enough vacuum.

69075 Full Range SuperEvac LCD Vacuum Gauge

Micron range: 760,000 to 1

Sensor: Thermocouple 69073

Resolution: 1 micron (below 1,000 microns)

Operating Temperature: -30ºF to 125ºF

Display: 0.5” LCD

Automatic shut-off: 20 minutes after power-up

Unit size: 12.5”L x 2.4” H x 9”D

Sensor cable: coiled cable extends to 6’

Sensor thread: 1/8” MPT

Sensor adapter: 1/8” FPT x 1/4” Male Flare

Power: 1 “D” cell battery

1/4” Female Flare Coupler: 69071

Repair service

YELLOW JACKET products from Ritchie Engineering Company, Inc. are

guaranteed to be free from material and workmanship defects for a period of one

year. This guarantee does not cover products which have been altered, abused,

misused or improperly maintained.

All returns MUST have an RGA number and proof of purchase/copy of invoice.

Please obtain an RGA number from Ritchie Engineering customer service by

calling [phone]. All returns must be pre-paid.

YELLOW JACKET Products Division

Ritchie Engineering Company, Inc.

10950 Hampshire Avenue, South

Bloomington, MN 55438-2623

Phone: [phone] or [phone]

Fax: [phone] or [phone]

e-mail: [e-mail]

Web: www.yellowjacket.com

© 2002-2012 Ritchie Engineering
Printed in USA P/N 180355B

YELLOW JACKET

Full Range

UPEREVA C

S
LCD Vacuum
Gauge

Operation and Maintenance

™

UPC No

686800 -

.

69075

®

IMPORTANT NOTICES TO PURCHASER Sensor and Gauge Installation and Operation

Check for damage immediately.
Carton contents include:

Digital 760,000 to 1 micron gauge

•

mounted on rugged housing

6’ coiled sensor cable

•

Thermocouple sensor with adapter

•

All metal coupler (69071)

•

Warranty registration card

•

Instructions

•

Warranty and Repair Policy

Prior to shipment, YELLOW JACKET

69075 Vacuum Gauges are calibrated,

tested and inspected to assure

compliance with specifications.

Manufacturer guarantees that all

products are free of manufacturing and

Impact resistant housing

Easy-to-read
high contrast
display

2

material defects to the original owner

for one year from the purchase. In

order to protect your warranty,

return warranty card within 15

days from date of purchase. If an

instrument should fail during the

warranty period, it will be repaired or

replaced at no charge at the option of the

manufacturer. This warranty does not

apply to products that have been altered,

misused, or returned solely in need of

field service maintenance. Sensor

contamination is not covered by

warranty. Repairable instruments that

are not covered by the condition of the

original warranty will be repaired for a

nominal fee, F.O.B. shipping point. See

back cover for return details. Repairs

will carry an independent 90-day

guarantee of satisfaction.

Sensor plugs into
the cable connector

Thermocouple sensor is

factory calibrated and

provides consistent

accuracy

69071 coupler

Thermocouple sensor

Your new YELLOW JACKET 69075

LCD gauge system has a thermocouple

sensor. Thermocouple technology has

been long proven in laboratory and

industrial precision instrumentation for

sensing the lower vacuum range.

Thermocouple sensors are factory

calibrated and exhibit none of the

electronic variances of thermistor sensors

found in many other electronic vacuum

gauges.

YELLOW JACKET LCD Gauge

A rugged molded case protects the gauge’s

electronic circuitry. The circuitry controls

the electricty flow that heats the sensor

elements and translates the temperature

readings into micron readings on the high

contrast LCD (liquid crystal display).

The gauge is a battery-powered

instrument. Normal handling and jarring

will not affect the LCD reading.

Basic Set-up Sequence

Features of your gauge include:

Sense full micron range of 760,000

•

to 1 micron.

Ready-to-use with no adjustments

•

or warm-up. Pre-calibration is

repeatable job after job.

Automatic ambient temperature

•

compensation.

Stays calibrated after on/off

•

switching and over long

evacuations.

Nickel-plated steel sensor housing.

•

Sensors are interchangeable.

•

Battery condition display.

•

Automatic battery strength

•

compensation.

Automatic shut-off 20

•

minutes after power-up

The “thermo” of thermocouple relates to

the heat generated in the sensor by

electricity. As vacuum increases there

are fewer molecules of air or

contaminants to cool the thermocouple,

and the temperature rises. The change

in temperature is transmitted as input

through the sensor cable to the

gauge’s circuitry.

4 5

1. Attach the coupler to the sensor

assembly. The coupler provides a

convenient method for connecting to

the system without adding a significant

source of additional molecules.

2. Plug the sensor into the sensor cable.

3. Attach the coupler, sensor and cable to

a dry part of the system. The sensor

will not work if it becomes filled with

system oil.

Always keep the sensor upright to

help prevent contamination and

ensure accurate readings.

If oil inadvertently enters the coupler,

the oil must be removed before

continuing.

4. Turn on the gauge and the LCD

illuminates immediately. If the letters

“LobA” appear in the left of the

display, the battery is not powerful

enough for use and must be replaced.

After the automatic battery condition

check, the number 760000 will appear in

the display. 760,000 microns is the

pressure of one atmosphere. Begin the

evacuation. The gauge will monitor the

vacuum from 760,000 to 1 micron.

Cleaning the sensor

If a sensor becomes lightly contaminated

with oil or other foreign matter, it may be

possible to clean it. Dissamble the coupler

and sensor from each other. Flush or fill

each with a solvent that you know will

remove the contaminant. Before reuse, the

components should be completely dried or

flushed with a volatile solvent to prevent

contamination of the AC&R system

with moisture.

If the sensor is heavily contaminated, you

will need to purchase a 69073 replacement

sensor from your YELLOW JACKET

wholesaler.

Gauge repair

The LCD gauge is designed for years of

trouble-free service. There are no moving

parts and the circuitry is secured within

the heavy-duty molded case.

If service or recalibration of the LCD

unit does become necessary, the

instrument must be returned to the

factory. Any attempt at field service

other than replacing the sensor will void

the warranty.

Tips for best evacuation and
gauge performance

When pulling a vacuum take the

following steps:

1. If the reading on the YELLOW

JACKET pump built-in indicator

gauge stays in the mid range, there is

either high contamination or a large

leak in the system. (Throughout the

process, remember the refrigerant

recovery laws.)

If you think there is excessive

moisture, blow out the AC&R

system with dry nitrogen wherever

possible. This reduces the amount

of contaminants that must be pulled

into the pump, and increases

evacuation speed.

2. When the built-in indicator gauge on

the pump reaches the green (29”-30”)

range, it is time to turn on the LCD

vacuum gauge.

3. It is advised to purchase a 69067 ball

valve to attach to the sensor. Keeping

the valve closed during system

pressurization isolates the sensor from

the system and helps prevent damage

to the sensor.