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vacuum reading.
During the first stages of evacuation, vapors are highly concentrated. Unfortunately, some vapors will condense into a
liquid and mix with the oil, thus reducing the oil's ability to produce a deep vacuum. The GAS BALLAST VALVE emits a
controlled amount of dry air into the pump during compression to minimize this effect and keep oil relatively clean during
the first part of the evacuation.
Periodically remove the Gas Ballast Valve Needle and clean or replace the O-ring. Clean mating surfaces and lightly coat
with vacuum pump oil before securely re-tightening.
CHANGING OIL
In order to reach the deep vacuum required, your vacuum pump needs clean, moisture-free oil during evacuation. Dirty oil
becomes a mixture of corrosive acids and water that effects the pump's ability to pull a deep vacuum. Left sitting in the
pump, this sludge will rust and erode internal surfaces shortening the pump's life.
Care should be taken to avoid contact of oil with skin or eyes. OIL MAY BE HOT! Used oil should be properly disposed of
in a leak-tight corrosion-resistant container according to local regulations.
1. After every evacuation, while the pump is warm and oil is thin, take a small sample of oil from the drain port.
2. If the oil is contaminated, drain the oil by placing the pump on a level surface and opening the oil drain valve. Catch
the waste oil in a container and properly dispose of it.
3. If the pump has been sitting for more than one month, the oil is considered contaminated regardless of appearance
and should be changed as outlined above.
4. To add oil, close drain, remove the exhaust muffler, fill to the Oil Level Line with fresh oil and replace the exhaust
muffler.
INTAKE CONNECTIONS
After use, replace all caps and finger-tighten. Do not use caps with damaged or missing O-rings and always store
vacuum pump with capped ports to prevent dirt and moisture contamination.
PUMP MOTOR
The PUMP and OIL must be above 30˚F (-1˚C). The line voltage must be equal to the rating on the motor nameplate
±10%. Normal operating temperature is approximately 160˚F (71˚C), which is HOT to the touch! Line voltage and ambient
temperature will affect the normal operating temperature. Your vacuum pump is designed for continuous duty and will run
for extended periods without overheating. The motor has an automatic resetting overload protection feature. If the motor
will not restart the pump after shut-off, it may have opened the thermal protection. Disconnect the pump from the system,
wait about 15 minutes for the motor to cool down and then try again.
SOLENOID VALVE AND GAUGE (OPTIONAL)
The solenoid valve opens when power to the vacuum pump is turned on. If the vacuum pump loses power for any reason,
the solenoid valve will close, preventing vacuum pump oil from backing up into the system it is connected to. The vacuum
gauge gives a rough indication of vacuum. It can be used for leak testing by setting the pointer at the current vacuum
level and leaving the system closed for an extended period of time. For micron level readings, an electronic vacuum
gauge (Mastercool's 98063-BT) is recommended.
LIMITED WARRANTY INFORMATION
The vacuum pumps are warranted against defects in material and workmanship for a period of one year. This warranty
does not cover failure due to abuse, improper usage, or progressive wear and tear. Warranty becomes valid to the original
owner and is effective on the purchase date. WARRANTY SERVICE IS PROVIDED THROUGH THE FACTORY ONLY. Please
contact the service department toll free (1-888-825-6989) for parts, service concerns, or to obtain a return authorization
number for warranty repair.
WARNING: This product can expose you to chemicals including Di (2-ethylhexyl) phthalate, lead and lead compounds, which are known
to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov
www.mastercool.com
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