Hale ESP Priming System - Manual (Page 48)

❑ Troubleshooting
48 ESP Primer System Instruction Guide
p/n: 029-0810-01-0
Pump Loses Prime
or Will Not Prime -
continued.
Chart continued on
next page.
Suction connections. • Clean and tighten all suction connections.
• Check suction hose and hose gaskets for possible defects - repair
and/or replace.
Air trapped in suction
line. • Avoid placing any part of the suction hose higher than the suction
intake.
• Suction hose should be laid out with continuous decline to fluid
supply.
• If trap in hose in unavoidable, repeated priming may be needed to
eliminate air pockets in suction hose.
Insufficient priming. • Proper priming procedures should be followed.
• Do not release the primer control before assuring a complete
prime.
• Open the discharge valve slowly during completion of prime to
ensure complete prime.
NOTICE !
DO NOT RUN THE PRIMER OVER FORTY-FIVE (45) SECONDS. IF PRIME IS NOT
ACHIEVED WITHIN 45 SECONDS, STOP AND LOOK FOR CAUSES
(AIR LEAKS OR BLOCKED SUCTION HOSES).
Pump pressure too low
when nozzle is opened. • Prime pump again and maintain higher pump pressure while open-
ing the discharge valve slowly.
Air leaks. • Attempt to located and correct air leaks using the following proce-
dures:
• Perform “Dry Vacuum Test” on pump per NFPA standards with
22” Hg. minimum vacuum required with loss not to exceed 10”
Hg. in five (5) minutes.
• If a minimum of 22” Hg. cannot be achieved, the priming device
or system may be inoperative, or the leak is too big for the
primer to overcome (such as an open valve). The loss of vac-
uum indicates leakage and could prevent priming or cause loss
of prime.
• After priming shut OFF the engine. Audible detection of a leak
is often possible.
• Connect the suction hose from the hydrant or the discharge of
another pumper to pressurize the pump with water and look for vis-
ible leakage and correct. A pressure of 100 PSI (6.9 BAR / 0.7
MPa) should be sufficient. DO NOT exceed pressure limitations of
pump, accessories or piping connections.
• The suction side relief valve can leak. Plug the valve outlet con-
nection and retest
Condition
Possible
Cause
Suggested Corrective Action
Figure 6-1: Troubleshooting Chart