Viking Pump TSM1470: HI-LO Double Pumps - Manual (Page 4)

SECTION TSM 1470 ISSUE F PAGE 4 OF 8
START UP
Before pushing the “start” button, check the following:
1. Are vacuum and pressure gauges (liquid filled) mounted
on or near the pump? Gauges are the quickest and most
accurate way of finding out what is happening in the
pump.
2. The pump is correctly aligned.
3. There is no pipe strain on the pump casing.
4. The pump shaft turns freely when rotated by hand.
5. The motor has been jogged and is running in the correct
direction. Refer to “ General” page 1 item 3.
6. A pressure relief valve is properly installed.
7. The suction piping is connected and tight, and the valves
are open.
8. The discharge piping is connected and tight, valves are
open and there is a place for the liquid to go.
9. All guards are in place.
The “start” button can now be pushed.
The pump must begin to deliver liquid within 15 seconds!!
If not, push the “stop” button. Do not run pump without liquid
flow longer than 30 seconds or the pump may be ruined!!
Review the steps just outlined. Consider what the suction and
discharge gauges indicate. If everything appears in order,
re-prime the pump. Refer to Mounting, page 2, item 6.
Push the “start” button. If nothing is flowing within 30 seconds,
stop the pump. The pump is not a compressor; it will not
build up much air pressure. It may be necessary to vent the
discharge line until liquid begins to flow.
If the pump still does not deliver liquid, consider one or more
of the following:
1. Air leak(s) in the suction line.
2. The end of the suction pipe is not submerged deep
enough in to the liquid.
3. The suction lift is too great, the suction pipe is too small
or the suction pipe run is too long.
4. Liquid is vaporizing in the suction line before it gets to
the pump.
If, after consideration of these points, the pump still does not
deliver liquid, review all points given under START UP and
read through the following TROUbLESHOOTING guide and
try again. If the pump still will not deliver liquid, contact your
Viking Pump supplier.
TROUbLESHOOTING
A Viking pump that is properly installed and maintained will
give long satisfactory performance.
If trouble does develop, one of the first steps toward finding
the difficulty is to install a vacuum gauge in the suction line
and a pressure gauge in the discharge line. Readings on
these gauges often give a clue on where to start looking for
trouble.
DANGER !
before opening any Viking pump liquid chamber
(pumping chamber, reservoir, relief valve adjusting
cap fitting etc.) be sure:
1. That any pressure in chamber has been
completely vented through the suction or
discharge lines or other appropriate openings
or connections.
2. That the driving means (motor, turbine, engine,
etc.) has been “locked out” or made non-
operational so that it cannot be started while
work is being done on the pump.
3. That you know what liquid the pump has been
handling and the precautions necessary to
safely handle the liquid. Obtain a material safety
data sheet (MSDS) for the liquid to be sure these
precautions are understood.
Failure to follow the above listed precautionary
measures may result in serious injury or death.
Vacuum Gauge - Suction Port
High vacuum reading would indicate:
1. The suction line is blocked or restricted, a valve is
closed, the strainer is plugged.
2. The suction line is too small.
3. The liquid is too viscous to flow through the piping.
4. The lift required is too high.
Low reading would indicate:
1. An air leak in the suction line.
2. The end of the pipe is not in the liquid.
3. The pump is worn.
4. The pump is dry and should be primed.
Fluttery, jumping or erratic reading would indicate:
1. The liquid is vaporizing (cavitation).
2. Liquid is coming to the pump in slugs, a possible air leak
or insufficient liquid above the end of the suction pipe.
3. Vibration from cavitation, misalignment, or damaged
parts.