J.P. Instruments Fuel Scan 450 Installation Manual

J.P.Instruments Fuel Flow Installation Manual Report # 400

FS-450 Page 1 of 16

Rev A : Date 02/1/2002

Table of Contents

1 Installation Instructions 2
2 Placards and Markings 2
3 Installing the Fuel Flow Transducer: 3
4 Mounting Procedure 700921 4
5 Mounting Procedure: 700922 5
6 Mounting Procedure 700923 6
7 Mounting Procedure:700924 7
8 Specifications and Limitations 8
9 TSO Conditions 8
10 Specifications and Limitations 9
11 TSO Label 10
12 Operating Instructions 11
13 Initial Check Out 12
14 List of Major components: 14
15 Instructions for Continued Airworthiness (ICA) 14
16 Wiring Drawing 15
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

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. 43.13.1Ach. 11 sec. 2, 3, 7. The accuracy of this
instrument depends entirelyupon 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 0.25amps (maximum). Exceeding this limit willdamage 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 thefuel 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 locationon the engine, being sure there is sufficient slack to absorb engine
torque. It is essential in routing thefuel flow transducer wires not be allowed to touch metal parts of the air-frame or
engine since abrasionwill 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 Report # 400

fuel pump.

END VIEW UP

transducer and the

FS-450 Page 3 of 16

Rev A : Date 02/1/2002

Aircraft Configuration

1. PN 450000-G All gravity Flow installations without

Must use transducer PN 700900-2

2. PN 450000-P All Fuel injected engines with vapor return lines

to fuel tank , all Continental and certain Lycoming engines.

3. PN 450000-P,-H All pump fed carbureted and Fuel injected
engines without vapor return lines. PN 450000-P range up to

Drawing Location

700923

700922

700921

Between Fuel tank and
Carburetor.

Between throttle body and
fuel flow divider.

Between engine driven pump
and servo/throttle body or
carburetor

60 GPH and PN 450000-H range up to 120 GPH

4. PN 450000-D Pressure Carbureted engines with vapor return
lines. Requires Dual transducers

5. PN 450000-M- If “M” is after the PN it signifies that the displayis
3” Fuel flow for twin engine aircraft single indicator.

700924
450508
700922

One transducer in Carb inlet
line and one transducer in
outlet line
Between throttle body and
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 witha 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.

If the transducer is
higher than the

Mount the
transducer
with the
wires up.

carburetor or fuel
servo, put a loop in the
fuel line between the

¼ NPT

SIDE VIEW

Carburetor or Servo

The direction of the fuel
flow through the transducer
is marked on top

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 Report # 400

Existing Fitting

support

MS21919 Clamp

as required

FS-450 Page 4 of 16

Rev A : Date 02/1/2002

Fuel injector

Aeroquip
900591B Clamp

AE102/624-24

TRANSDUCER

2-AN816- Pipe to
Flare fitting. Do not
use aluminum fittings

To Engine Driven Fuel
Pump Existing

8" max from

New 303Aeroquip hoseAeroquip Fire Sleeve

4 Mounting Procedure 700921

1. Find a convenient location within 8" of a hose support or fitting and away from anyhot 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 theCarburetor (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 FlowTransducer to thecarburetor (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, verifythat the boost pump delivers at least 125% of takeoff fuel

consumption at minimum fuel pressure as marked on fuel pressure gage.

5. Mount the FuelFlow Transducer in the fuelline. 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 fromthe

fuel pump to the carburetor or fuel servo.

Drawing No. 700921

Date

02/14/97

Drawn Approved

Rev NC

J.P.Instruments Fuel Flow Installation Manual Report # 400

IN

303 hose

FS-450 Page 5 of 16

Rev A : Date 02/1/2002

To the Flow Divider

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.

Aeroquip
900591B Clamp

Fittings ¼ NPT to
Fuel Hose (do not
use aluminum
fittings

Aeroquip Fire
Sleeve
AE102/62-24

Aeroquip

See note 5

From theFuel 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

02/14/97

Drawn/ Approved

Rev NC