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Trident Emergency Products, LLC
2940 Turnpike Drive | Suite #9 | Hatboro, PA 19040 USA

12

AirPrime

™ Fire Pump Priming System

Trouble Shooting Guide

Problem

Likely Cause

Corrective Action

System 

Does Not

 

Hold Vacuum.

• Master Drain Valve Open.
• Discharge or Intake Valves Open.
• Bleeder or Drain Valves Open.
• Relief Valve Drain Open.

Double check all drains, discharge and intake valves to make sure all are 
closed.

Intake Relief Valve Allowing Air Into 
Pump System.

a)  Adjust intake valve to closed position (be careful to count the number of 

turns to close and re-open the same number of turns).

b) Cap the discharge side of the intake relief valve (NPT or NH).  

Be sure to remove cap after testing.

AirPrime Exhaust Outlets Drawing 
Back Vacuum.

The integral priming valve is not closing all the way, air is moving upward into 
the barrels, into the pump, as the water falls back into the hard suction hose to 
the water level or as vacuum is lost through the fire pump system.

System 

Will Not

 

Reach 22" Hg.

Inadequate air supply.

a)  Check the CFM rating of the engine air compressor. 

See Page 4

.

b) Check air pressure at “supply” side of AirPrime (should be over 70-PSIG/

[3.8 Bar]

). Install a tee and air gauge in input for test purposes. If the air 

pressure is not the same as the cab dash air pressure gauge, check for 
under sized airline, kinks or obstructions in air line, or air line is too long 
(under 20 ft 

[6 m]

 from primary tank.

Pressure Protection Valve.

Check Pressure Protection Valve air on/off settings (should shut-off in the 60 
to 80-PSIG / 

[4.2 to 5.5 Bar]

 range) and OPEN no higher than 80-PSIG / 

[5.5 Bar

]

 

to AirPrime.

Air filter on intake side of air supply 
connection to 

AirPrime

 body.  

For details on filter inspection/

replacement visit/click QR codes at right.

a)  Manual AirPrime: Remove air supply piping, remove fine mesh filter, clean 

or replace. Part#: 21.002.0

b) Automatic AirPrime: Remove air supply piping, remove air solenoid 

assembly, remove fine mesh filter, clean or replace. Part #: 21.002.0

Slight air leak in discharge or intake 
valves in fire pump plumbing.

Hydrostatic test the plumbing system to NFPA #1901 standard with wet fire 
pump and closed valves: 250-PSIG 

[17.2 Bar]

 for 10 minutes w/ pressure loss.

Check the interior check valves 
inside the primer.

Remove and disassemble primer to inspect the (3) small rubber check valves 
to venturi orifices.

Check the interior primer body 
venturi nozzles for foreign material 
or blockage.

Remove and disassemble primer to inspect venturi nozzle openings or clean 
with small wire to assure open orifices.

Defective Primer.

Replace or rebuild primer with Kit #27.003.3. 

See Instructions Here 

AirPrime

 

Leaks

 

Water.

Check the 

AirPrime

 integral priming 

valve.

a)  The priming valve is not seating in the shut-off position: Remove primer, 

disassemble, and check the priming valve spring, seat and operation.

b) The priming valve is “stuck”, check for damaged O-Ring or check to see if 

piston is fully threaded on the valve stem.

Manual System: 
Air continues to 
flow when button 
is released.

Bad push button manual valve.

Push button air plumbing installed 
incorrectly.

Replace the Push Button with a new valve, Part #27.003.1.

Refer to air schematic drawing, Figure 14 on Page #8 of this manual.

Automatic 
System: Air 
continues to flow 
when button is 
released.

Panel switch inoperable.

Air solenoid on top of primer is 
defective.

Solenoid is on backwards.

Refer to parts list on Page 16, order replacement switch, Part #27.003.2.

Refer to parts list, order replacement solenoid, Part #30.003.0 (12 Volt) or 
#30.003.1 (24 Volt).

Reverse orientation of solenoid on top of manifold. Ports on solenoid and 
manifold should be on the same side.

Visit 

www.TridentAutoAirPrime.com

 for additional AirPrime information.

Summary of Contents for AirPrime Series

Page 1: ...Prime Models Automatic Controls Manual Controls t Lift Gauge Option Standard Control q Lift Gauge Option u q Standard Control AIRPOWER SC 1901 Self Contained Priming System SC 1906 Self Contained Priming System AirPrime Pressure Regulator For use with high pressure SCBA cylinders ...

Page 2: ...s for Manual to Automatic and for adding more locations are available Refer to Page 16 5 AirPrime is also available for small trucks without air brakes See Page 5 for additional information For more information on all available models please visit www TridentDirect com or www TridentAutoAirPrime com Contents Available Models 2 AirPrime Overview 2 AirPrime How Does It Work 3 Installer Responsibilit...

Page 3: ...d fire ground operations and safety Auto Prime Move Switch to the upper position The Green LED light will illuminate The primer will activate when the OK TO PUMP light is ON and the Pump Pressure is below 20 PSIG The Auto Mode only operates when the fire pump is engaged AirPrime Primers can be used for both New and Retro Fit installations In Retro Fit scenarios AirPrime may be used to augment the ...

Page 4: ...quired for all threaded pneumatic fittings NOTE Use sparingly while applying sealant to avoid blockage of the internal mesh air filter See Page 5 Figure 5 Remote Primer Mounting 1 An installer supplied primer bracket shall be installed to secure the primer within the pump enclosure The mounting height for all priming components must be ABOVE the highest priming point on suction side of fire pump o...

Page 5: ... and must not be run near exhaust pipes Stay 6 150 mm away from any exhaust or hot components muffler or rotating shafts Use grommets to protect the tubing lines from contacting sharp edges at hole locations When the length of tubing required exceeds 20 feet 6 1 m a minimum size of 1 2 OD air brake tubing should be used Pressure Protection Valve PPV The Pressure Protection Valve 4 is not supplied ...

Page 6: ...switch in AUTO PRIME mode 2 If drafting connect all suction hoses strainer and tighten accordingly Utilize wheel chocks In cab Apply parking brake Engage pump per manufacturers recommendations AirPrime will start priming automatically when the pump is engaged NOTE Never run a fire pump dry for more than 45 seconds 3 Pump Panel Verify that the green OK TO PUMP light is ON and then increase RPM When...

Page 7: ... pump shift control circuit PTO or split shaft 1 5 feet long 5 m Red and Black wires to power supply 1 foot long wiring and 1 amp fuse by installer Plug in to AirPrime solenoid connection 5 feet of cable 1 8 m Plug in to fire pump discharge pressure switch 5 feet of cable 1 8 m See Figure 6 on Page 6 6 Connect a 1 4 OD 6 35 mm tubing line Not supplied from the push to connect fitting supplied on t...

Page 8: ...erated simply by increasing the engine speed to a maximum of 1000 RPM and depressing the push button on the panel Hold the button down until the discharge pressure gauge begins to rise The primer will stop running when the push button is released The push button will operate the primer regardless of whether the fire pump is engaged or not 1 Depressing the Push To Prime button directs air to the pr...

Page 9: ... push button control as shown in Photo 5 7 Gold labels are provided for LEFT RIGHT FRONT and REAR remote priming locations as shown in Photo 6 8 See Photos 3 and 4 to note that the cast in arrows on the RPVs and Check Valves are in the proper direction of flow Operating Instructions for Multi Location Automatic Priming System 1 See operating instructions for automatic priming system on Page 6 for ...

Page 10: ...ubing Minimum 3 8 Tubing Minimum 3 8 Tubing Min 3 4 Tubing Minimum 3 8 Tubing Min Drawing Denotes Two 2 Additional Multi location Priming Points Check Valve Panel Switch Color Key Electric Lines Air Supply Lines Vacuum Priming Lines Multi Location Wiring Harness 3 4 Tubing Minimum See photo inset lower left corner Out Figure 16 Color Key 3 4 ID External Flex Line 3 4 ID External Flex Line 3 4 ID E...

Page 11: ...ion Color Key 3 4 ID External Flex Line to Low Point Drain 1 2 ID Internal Flex Line 3 4 ID External Flex Lines 1 2 or 5 8 ID External Flex Line 1 2 ID Internal Flexible Tubing Priming Line Drain Valve 1 2 or 5 8 ID External Flexible Tubing 3 4 Weld Coupling 3 4 ID External Flex Tubing Merge All High Point Pickups At The Valve Location Higher Than The High Points Fittings In Kit From Outside Of Pi...

Page 12: ...l AirPrime Remove air supply piping remove fine mesh filter clean or replace Part 21 002 0 b Automatic AirPrime Remove air supply piping remove air solenoid assembly remove fine mesh filter clean or replace Part 21 002 0 Slight air leak in discharge or intake valves in fire pump plumbing Hydrostatic test the plumbing system to NFPA 1901 standard with wet fire pump and closed valves 250 PSIG 17 2 B...

Page 13: ...ed Master Intake Valves on suction intakes a Remove the MIV and cap intake b Install a cap on the discharge side of the relief valve c Cap the Storz or NH intake Check the AirPrime integral priming valve a The priming valve is not seating in the shut off position remove primer disassemble and check the priming valve spring seat and operation b The priming valve is stuck check for damaged O Ring or...

Page 14: ... pumping test outlined in the NFPA standards 2 Engage the pump and increase the throttle to a maximum engine speed of 1000 RPM 3 Operate the AirPrime with the air system at over 100 PSIG 7 0 Bar pressure air tanks filled to capacity and at 1000 RPM engine speed For the Manual controlled primer release the push button when a discharge pressure over 20 PSIG 1 4 Bar is obtained For the Automatic AirP...

Page 15: ...rty can result from improper selection or improper use of products described in this instruction manual Since TRIDENT has no control over the number and variety of applications for which its products may be purchased or the conditions under which they may be used TRIDENT liability on any claim whether in contract tort including negligence or otherwise for any loss or damage shall in no case exceed...

Page 16: ...uge 02 006 10 22 Remote Priming Valve RPV 30 035 1 23 1 4 NPT Air Check Valve 30 012 0 24a Remote Priming Valve with 12 Volt Solenoid 30 035 10 24b Remote Priming Valve with 24 Volt Solenoid 30 035 11 25 Multi Location Push Button w Mounting Plate 27 003 9 26a Label Only Primer Front Intake 02 006 5 26b Label Only Primer Rear Intake 02 006 6 26c Label Only Primer Left Side 02 006 7 26d Label Only ...

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