Robinair Model 15401 - Manual (Page 6)

Troubleshooting guide
This 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 that results in
the pump being inoperable.
Failure to start
Check line voltage. Robinair pumps are designed
to start at +10% line voltage (loaded) at 0 o C. At
extremes, however, switching between the start
and run windings may occur. When starting the
pump in cold temperatures, verify the Iso-Valve
and inlet port are open to free air.
Oil leakage
1. Verify the oil is not a residual accumulation
from spillage, etc.
2. If leakage exists, the module cover gasket
or the shaft seal may need replacing.
Follow the instructions supplied with the
seal replacement kit, part number 15367. If
leakage exists in the area of the drain plug,
reseal the plug using a commercial pipe
thread sealer.
Failure to pull a good vacuum
1. Verify the Iso-Valve on the pump is in the
OPEN position, and the gas ballast knob is
tightly sealed.
2. Verify the vacuum gauge and all connections
are in good conditon and leak-free. Confirm
leakage by monitoring the 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. Be sure the pump oil is clean. A badly
contaminated pump may require several oil
flushes. See OIL CHANGE PROCEDURE.
4. Verify 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. See OIL
CHANGE PROCEDURE. Do not overfill.
Operating temperatures cause the oil to
expand, so it will appear at a higher level than
when the pump is not running. To check the
oil level, start the pump with the inlet capped.
Check the oil level in the sight glass. Add oil if
necessary.
Pump Specifications
Model 15401
Frequency Range .................................... 50-60 Hz
Free Air Displacement .........................4 cfm/60 Hz
..................................................94 l/m @ 50 Hz
................................................ 113 l/m @ 60 Hz
Stages ..................................................................2
Motor Speed .............................1425 rpm @ 50 Hz
.............................................1725 rpm @ 60 Hz
Voltage Range ......................................110V–115V
........................................................ 220V–250V
Factory Micron Rating .......................... 15 microns
Approximate Oil Capacity ............................ 400 ml
Weight ........................................................... 13 kg
Width ....................................................... 14.29 cm
Height ........................................................ 24.6 cm
Length........................................................... 40 cm
Intake ....................................
1 /
4
" and 1 /
2
" SAE MFL
Min. Starting Temp. (at 90% voltage) ............... 0 o C
Motor Size ............0.25kW ( 1 /
3
HP) Capacitor Start
Operating Temp. ............................................. 68 o C
Models 15601/15603/15605
Frequency Range .................................... 50-60 Hz
Free Air Displacement .........................6 cfm/60 Hz
................................................142 l/m @ 50 Hz
................................................170 l/m @ 60 Hz
Stages ..................................................................2
Motor Speed .............................1425 rpm @ 50 Hz
.............................................1725 rpm @ 60 Hz
Voltage Range ......................................110V–115V
........................................................ 220V–250V
Factory Micron Rating .......................... 15 microns
Approximate Oil Capacity ............................ 400 ml
Weight ........................................................... 13 kg
Width ....................................................... 14.29 cm
Height ........................................................ 24.6 cm
Length........................................................... 42 cm
Intake .............................
1 /
4
", 3 /
8
", and 1 /
2
" SAE MFL
Min. Starting Temp. (at 90% voltage) ............... 0 o C
Motor Size ...........0.25 kW ( 1 /
3
HP) Capacitor Start
Operating Temp. ............................................. 68 o C
Notes:
1. All motors are internally protected (automatic
reset).
2. Operating temperatures are typical for normal
operating conditions.
3. Model 15603 has a bipolar side grounded plug.
4. Models 15405 & 15605 have Australian plugs.
Because of ongoing product improvements, we reserve the right to
change design, specifications, or materials without notice.
Operating Manual
6