J.P.Instruments Fuel Flow Installation Manual |
Report # 400 |
FS-450 |
Page 1 of 16 |
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Rev A : Date 02/1/2002 |
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Table of Contents |
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Installation Instructions |
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Placards and Markings |
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Installing the Fuel Flow Transducer: |
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Mounting Procedure 700921 |
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Mounting Procedure: 700922 |
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Mounting Procedure 700923 |
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Mounting Procedure:700924 |
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Specifications and Limitations |
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TSO Conditions |
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Specifications and Limitations |
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TSO Label |
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Operating Instructions |
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Initial Check Out |
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14 List of Major components: |
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15 Instructions for Continued Airworthiness (ICA) |
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16 |
Wiring Drawing |
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17 |
Template Drawing |
16 |
J.P.INSTRUMENTS
PO BOX 7033
HUNTINGTON BEACH CA 92646
Last printed in USA 02/19/13
J.P.Instruments Fuel Flow Installation Manual |
Report # 400 |
FS-450 |
Page 2 of 16 |
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Rev A : Date 02/1/2002 |
1 Installation Instructions
General: A complete thorough familiarization and understanding of the system and this manual is necessary before commencing the installation. All work must conform with A.C. 43.13.1A ch. 11 sec. 2, 3, 7. The accuracy of this instrument depends entirely upon the accuracy of the data entered. A periodical checking of the actual fuel onboard will eliminate the accumulation of errors due to evaporation leaks, etc.
Route the (Optional) External Warning Control Line: The wire from pin 4 on the J-1 (D-SUB 9) can be connected to an external warning light or buzzer. This pin goes to ground when the display flashes a warning. The current in this line must be limited to 0.25 amps (maximum). Exceeding this limit will damage the unit. Tie off this wire if not in use as not too obstruct the freedom of the controls. The FS-450 can be connected in parallel to any existing digital fuel flow system. When connected to an existing flow sensor pin 3 red is not connected. See drawing 450508.
Install the Instrument in the Panel: Locate a 2.25 diameter hole or 3.125 diameter in the instrument panel, where you would like to mount the indicator per drawing 450124. The instrument configures itself automatically for 14/28 volt aircraft. The instrument is 1.5” deep less connectors and is 2.6 or 3.5 square behind the panel.
Route the Fuel Flow Transducer Wires: Route the fuel flow wires from the probes through the firewall using fireproof rubber grommets and flame retarding silicone. Use an existing hole if possible. Following the existing wiring harness. All wires must be routed away from high temperature areas (exhaust stacks, turbochargers, etc.). Secure Probe leads to a convenient location on the engine, being sure there is sufficient slack to absorb engine torque. It is essential in routing the fuel flow transducer wires not be allowed to touch metal parts of the air-frame or engine since abrasion will destroy this wire. Connect wires in accordance with DWG 450508.
2 Placards and Markings
Do not use the PN 700900-1 Flow Transducer on aircraft with a gravity feed system.
Transducer Identification Markings
PN 700900-1 stamped on TSO label and Marked "20l " on the top of the unit,
PN 700900-2 stamped on TSO label and Marked "231" on the top of the unit.
PN FT4-8AEXS-LEA-2029 stamped on transducer side
The placard PN 700905
"Do Not Rely on Fuel Flow Instrument to Determine Fuel Levels in Tanks.”
Must be mounted on the aircraft instrument panel near the P/N 450000( ).
If the aircraft is equipped with a primary fuel flow gage, the following placard must be mounted on the aircraft instrument panel near the P/N 450000().
"Refer to Original Fuel Flow Instrumentation for Primary Information.”
J.P.Instruments Fuel Flow Installation Manual |
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Report # 400 |
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FS-450 |
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Page 3 of 16 |
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Rev A : Date 02/1/2002 |
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Aircraft Configuration |
Drawing |
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Location |
1. |
PN 450000-G All gravity Flow installations without fuel pump. |
700923 |
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Between Fuel tank and |
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Must use transducer PN 700900-2 |
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Carburetor. |
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2. |
PN 450000-P All Fuel injected engines with vapor return lines |
700922 |
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Between throttle body and |
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to fuel tank , all Continental and certain Lycoming engines. |
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fuel flow divider. |
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3. |
PN 450000-P,-H All pump fed carbureted and Fuel injected |
700921 |
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Between engine driven pump |
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engines without vapor return lines. PN 450000-P range up to |
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and servo/throttle body or |
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carburetor |
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60 GPH and PN 450000-H range up to 120 GPH |
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4. |
PN 450000-D Pressure Carbureted engines with vapor return |
700924 |
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One transducer in Carb inlet |
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lines. Requires Dual transducers |
450508 |
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line and one transducer in |
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outlet line |
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5. |
PN 450000-M- If “M” is after the PN it signifies that the display is |
700922 |
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Between throttle body and |
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3” Fuel flow for twin engine aircraft single indicator. |
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fuel flow divider. |
3 Installing the Fuel Flow Transducer:
Mount the Fuel Flow Transducer using the appropriate drawing in this manual.
The instructions listed below must be followed when installing a Fuel Flow Transducer.
Note: If your engine is equipped with a fuel return line from the carburetor back to the fuel tank two transducers are required.
The transducer output port should be mounted lower or even with the carburetor inlet port (or fuel servo on a fuel injected engine). If this is not possible, a loop should be put in the fuel line between the Fuel Flow Transducer and the carburetor or fuel servo (see diagram below). It is recommended not to hard mount the transducer to the carburetor or fuel servo.
Do not remove the caps on the flow transducer until the fuel hoses are ready to be installed. The flow of fuel through the transducer must follow the direction marked on the transducer.
Mount the transducer with the wires up.
If the transducer is higher than the carburetor or fuel servo, put a loop in the fuel line between the transducer and the
SIDE VIEW
Carburetor or Servo
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The direction of the fuel |
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END |
VIEW UP |
¼ NPT |
flow through the transducer |
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is marked on top |
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The flow transducer must be mounted so the wires exiting the transducer are pointing up.
Before connecting any hoses, thoroughly clean them and insure they are free of any loose material. High air pressure my be used, However, do not allow high air pressure to pass through the flow transducer.
J.P.Instruments Fuel Flow Installation Manual |
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Report # 400 |
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FS-450 |
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Page 4 of 16 |
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Rev A : Date 02/1/2002 |
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Fuel injector |
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TRANSDUCER |
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Existing Fitting |
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To Engine Driven Fuel |
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MS21919 Clamp |
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Pump Existing |
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as required |
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8" max |
from |
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Aeroquip |
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2-AN816- Pipe to |
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Aeroquip Fire Sleeve |
New 303Aeroquip hose |
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900591B Clamp |
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AE102/624-24 |
Flare fitting. Do not |
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use aluminum fittings |
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4Mounting Procedure 700921
1.Find a convenient location within 8" of a hose support or fitting and away from any hot exhaust pipes to suspend the Fuel Flow Transducer. The hose support or fitting may be on the input or output line of the Flow Transducer.
2.Remove the fuel hose which goes from the Fuel Pump to the Carburetor (or Fuel Servo).
3.Purchase two new hoses, one from the fuel pump (or the Fuel Filter) to the Fuel Flow Transducer and the other from the Fuel Flow Transducer to the carburetor (or fuel servo). There must be flexible hose in and out of the Transducer. The hoses must meet TSO-C53a Type C or D FAA specification. The new hoses must be the same size as the current hose in the aircraft.
4.Before connecting fuel hose to the carburetor, verify that the boost pump delivers at least 125% of takeoff fuel consumption at minimum fuel pressure as marked on fuel pressure gage.
5.Mount the Fuel Flow Transducer in the fuel line. The Flow Transducer must be wrapped with Fire Sleeving available at JPI. Place a small hole in the fire sleeve and pass the transducer wires through it. Seal with High temperature Silicone RTV sealant
6.For best results it is advisable to have two inches of straight tube just before the inlet to the transducer
J.P.INSTRUMENTS
PO Box 7033
Huntington Beach CA 92646
Title : Installation of a Fuel Flow Transducer in the fuel line from the fuel pump to the carburetor or fuel servo.
Drawing No. 700921
Date |
Drawn |
Approved |
02/14/97
Rev NC
J.P.Instruments Fuel Flow Installation Manual
FS-450
OUT
5 Mounting Procedure: 700922
1.Find a convenient location between the Throttle Body and the Flow Divider and away from any hot exhaust pipes to suspend the Fuel Flow Transducer.
2.Remove the fuel hose which goes from the Throttle Body to the Flow Divider.
3.Purchase two new hoses, one from the Fuel Servo to the Fuel Flow Transducer and the other from the Fuel Flow Transducer to the Flow Divider. There must be flexible hose in and out of the Fuel Transducer. The hoses must meet TSO-C53a Type C or D FAA specification. The new hoses must be the same size as the current hose in the aircraft.
4.Mount the Fuel Flow Transducer in the fuel line. The Flow Transducer must be wrapped with Fire Sleeve available at JPI. Place a small hole in the fire sleeve and pass the transducer wires through it. Seal with High temperature Silicone RTV sealant.
Report # 400
Page 5 of 16
Rev A : Date 02/1/2002
To the Flow Divider
Aeroquip
900591B Clamp
Fittings ¼ NPT to Fuel Hose (do not use aluminum fittings
Aeroquip Fire
Sleeve
AE102/62-24
IN |
Aeroquip |
303 hose |
See note 5
From the Fuel Servo
5.Secure at either end of the transducer to any convenient point on the engine with MS21919 clamps or equivalent.
6.For Continental fuel injected engines adjust the fuel pressure to account for the pressure drop across the transducer per Continental Service Bulletin M89-10, available at JPI.
J.P.INSTRUMENTS
PO Box 7033
Huntington Beach CA 92646
Title Installation of the Fuel Flow Transducer in the fuel line between the Throttle Body and the Flow Divider. Only applicable for Continental Fuel Injected Engines
Drawing No. 700922
Date |
Drawn/ |
Approved |
02/14/97
Rev NC
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