Robinair 15120A_15121A - Manual (Page 5)

Operating Manual
4
3. When the flow of oil has stopped, tilt the
pump forward to drain residual oil.
4. Replace the OIL DRAIN cap. Remove the
exhaust filter, and fill the reservoir with
new vacuum pump oil until the oil just
shows at the bottom of the sight glass. The
approximate oil capacity of the pump is 488
milliliters (16 1 /
2
ounces).
5. Verify the inlet ports are capped, then turn
ON the pump. Allow it to run for one minute,
then check the oil level. If the oil is below the
sight glass OIL LEVEL line, add oil slowly
(with the pump running) until the oil reaches
the OIL LEVEL line. Replace the exhaust
filter (hand tight), making sure the inlet is
capped and the drain cap is tight.
6. If the oil is badly contaminated with the
sludge that forms when water is allowed to
collect in the oil, you may need to remove
the oil reservoir cover and wipe it out.
Repeat this procedure as required until the
contami nation is removed. Replace the OIL
DRAIN cap, and refill the reservoir to the correct
level with fresh pump oil (see Step 4).
Cleaning the pump
Clean the pump with soap and water only.
CAUTION: Do not use commercial cleaners
that contain degreasing agents that can
damage polycarbonates. The pump handle and
base are made of Lexan*, one of the toughest
polycarbonate plastics available. However, it is
sensitive to degreasing agents.
*Lexan is a registered trademark of General
Electric
Motor lubrication
After three years of normal service or one year of
heavy-duty service, add electric motor oil or SAE
10 oil.
Troubleshooting guide
Your CoolTech pump has been designed for
dependable use and long life. If something
should go wrong, however, the following guide
will help you get the pump back into service as
quickly as possible.
If disassembly of the pump is required, please
check your warranty. The warranty may be
voided by misuse, or customer tampering which
results in the pump being inoperable.
Failure to start
Check the line voltage. Robinair pumps are
designed to start at +10% line voltage at 0 o C
(32 o F). At extremes, however, switching between
the start and run windings may occur.
Oil leakage
1. Confirm the oil is not a residual accumulation
from spillage, etc.
2. The module cover gasket or shaft seal may
need replacing. Follow instructions in Seal
Replacement Kit No. 15367.
If leakage exists in the area of the oil drain
plug, reseal the plug using a commercial pipe
thread sealer.
Failure to pull a good vacuum
1. Confirm the Iso-Valve is OPEN.
2. Are the vacuum gauge and all connections
in good conditon and leak-free? Confirm
leakage by monitoring vacuum with a
thermistor gauge while applying vacuum
pump oil at connections or suspected leak
points. Vacuum will improve briefly while the
oil is sealing the leak.
3. Is the pump oil clean? A badly contami nated
pump may require several oil flushes. See
Oil Change Procedure. Note: Use only high
vacuum pump oil such as Robinair’s Premium
High Vacuum Pump Oil. Other oils will
prevent pull-down to a deep vacuum.
4. Confirm the gas ballast knob is tightly closed.
5. Is the oil is at the correct level? For maximum
pump operation, the oil must be even with the
OIL LEVEL line on the sight glass when the
pump is running. Do not overfill. To check oil
level, start the pump with the inlet capped.
Add oil if necessary.
CoolTech ® specifications
Model 15120A
Frequency Range ..........................................60 Hz
Voltage Range ................................................ 115V
Free Air Displacement .................. 283 l/m (10 cfm)
Stages .................................................................. 2
Motor Speed ............................................ 1725 rpm
Factory Micron Rating ...........................15 microns
Approximate Oil Capacity ............488 ml (16 1 /
2
oz.)
Weight .........................................17.24 kg (38 lbs.)
Width ............................................. 14.29 cm (5 5 /
8
")
Height ............................................ 27.3 cm (10 3 /
4
")
Length............................................ 41,9 cm (16 1 /
2
")
Intake ............................. 1 /
4
", 3 /
8
", and 1 /
2
" SAE MFL
Min. Starting Temp. (at 90% Voltage) .... 0 o C (32 o F)
Motor Size ........................... 1 /
2
HP, Capacitor Start
Operating Temp. ................................ 74 o C (165 o F)
When you need help
If these procedures do not correct the problem,
contact your nearest Robinair distributor. The
distributor may recommend an additional
replacement part (this manual contains a parts
list) or suggest you send your pump to the nearest
authorized service center.