Use and Care Manual

2
HARVEST RIGHT • 7 CFM Vacuum Pump Operating Manual • 800.865.5584 • [e-mail]
INTRODUCTION
Each vacuum pump has been factory tested to guarantee 25 microns (25,400
Microns = 1 Inch of Hg) or better, and listed CFM performance. The serial number
has been recorded.
NOTE: Vacuum pumps are not to be used on Ammonia or Lithium Bromide (salt
water) systems. Pump maintenance is the responsibility of the owner.
MOTOR SPECIFICATIONS
Pump and oil must be above 30°F. Line voltage must be equal to motor nameplate
±10%. Normal operating temperature is approximately 160°F, which is hot to the
touch. Line voltage and ambient conditions can slightly affect this. Motor has
automatic resetting thermal overload protection.
The pump is designed for continuous duty and will run for extended periods
without overheating.
Model HR-7-115
CFM
7 CFM (285 l/m)
Motor
1/2 HP, 1725 RPM
Voltage
Standard 115V, 60 Hz
Plug
US 110V
Intake Port
3/4" JIC flare
Oil Capacity
21 oz (680 cc)
Dimensions
17-5/8"h x 9-1/8"w x 14"l
Weight
32 lbs (14.5 kg)
PUMP MAINTENANCE
In order to make the best use of your investment, familiarize yourself with the
features and operating instructions before starting pump. With routine care and
following proper maintenance guidelines, your pump will give you years of
reliable service. Pumps are designed for deep vacuum work in air conditioning
and refrigeration systems.
For longer pump life, vacuum pumps are recommended for use in conjunction
with Harvest Right oil filters.
Adding Oil
Pump oil acts simultaneously as a coolant, lubricant and sealant.
1. Slowly add oil until oil level rises to the top of the oil level line.
2. Replace oil fill plug.
If oil is too low, you will hear air out of the exhaust. If the oil level is too high,
excess oil will be blown out of the exhaust.
IMPORTANT: Use oil specifically refined for deep vacuum pumps. Using oil not
refined for deep vacuum pumps and/or operating with contaminated oil will void
warranty.
Pump oil should be changed after every batch with either filtered or new oil. Failure
to do so will void the vacuum pump warranty. If system is heavily contaminated,
oil may have to be changed several times during evacuation. After initial fill up,
it is best to check oil level with pump running.
After evacuation, oil contains rust forming water and corrosive acids. Drain
immediately while pump is warm.
Changing Oil
To reach deep vacuum, pumps need clean, moisture-free oil throughout evacuation.
Care should be taken to avoid contact on skin and clothing when changing oil.
Used oil should be removed while the pump is warm and the oil is thin. It should
then be filtered for future use or disposed of.
1. Unscrew black plug counterclockwise in drain base to open.
2. Drain pump.
3. Close drain on pump. Remove oil fill cap and fill to top of oil level line with
pump oil.
4. Replace oil fill cap.
Oil Filtration
Using an oil filter is a great way to save money, preserve the life of your vacuum
pump, allow your freeze dryer to perform as efficient as possible, and be more eco
friendly. Filtering the oil is quick and easy, and will aid the performance of your
freeze dryer. Changing the oil between each batch is required for warranty purposes.
When filtering used oil, you may want to use cardboard (or something similar) to
absorb any oil that could potentially drip on the floor.
1. At the end of each batch (preferably when the oil is still warm) place the oil filter
below the oil reservoir drain valve.
2. Open the oil reservoir drain valve and allow oil to drain into your oil filter. Assure
all of the oil comes out by lifting the rear of the vacuum pump slightly.
3. Wait for the oil to filter through your filtration system (this may take a couple
of hours).
4. Pour the filtered oil back into the vacuum pump.
5. Top off oil assuring the correct amount of oil is in your vacuum pump (the small
circle in the sight glass is covered).
6. Start your freeze dryer.
*Occasionally you may choose to pour oil through the filter multiple times in order
to better clean the oil.
How do I know that my filtered oil is clean for use?
The best indications for cleanliness are as follows:
• Oil is void of debris or particulates
• Oil is not milky or chalky
• Oil has clarity (the color may be yellow or amber and still have clarity)
• Your vacuum pump is achieving a pressure (mTorr) suitable for freeze drying
How do I know when I need to replace my oil filter?
• Oil won’t drain through filter (this can happen over time as debris builds up)
• Oil isn’t cleaning well (e.g.,the oil continues to be milky or full of debris)
What do I do to replace my oil filter?
• Replace the batting, the filter jar, or purchase a replacement filter from
Harvest Right, Part No. HR-OILFILTER.
Flushing
ALWAYS DRAIN PUMP BEFORE FLUSHING!
If the oil is badly contaminated, flushing may be necessary.
Slowly pour 1/3-1/2 cup of Vaccum Pump Oil into the intake connection while
pump is running. Repeat as required until contamination is removed from oil reservoir,
pump rotors, vanes and housing. Dispose of all oil used in flushing of pump.
IMPORTANT: Do not start pump before adding oil
♦
IMPORTANT: OIL LEVEL MUST BE ABOVE
HALF WAY IN SIGHT GLASS
7.2 CFM
3/4 HP, 1725 RPM
35 lbs