Bird Box - Bidirectional Isolator Relay Delay - Diesel 2

[Bishop at Supreme RV Service]

What Does It Do?
Intellitec's Bi-Directional Isolator Relay Delay-Diesel 2 offers a new
approach to charging batteries in an vehicle which uses a diesel
engine with up to a 200 Amp alternator. Adding a small dash-mounted
switch will allow emergency starts of diesel engines, requiring up to
1200 Amps of starter current. Unlike prior systems that only allowed
charging the auxiliary battery from the engine's alternator, the
charges batteries when one is being charged. When the vehicle is being
driven, batteries will be charged from the engine's alternator. When
the vehicle is plugged into shore power, batteries will be charged
from the converter or battery charger. If neither battery is being
charged, the batteries are fully isolated. The controller also senses
heavy loads on either battery to prevent the wrong battery from being
inadvertently discharged.

How Does It Work?
The Bi-Directional Isolator Relay Delay - Diesel 2 constantly senses
the voltage on the auxiliary and chassis batteries. If either voltage
is above 13.1 volts, which indicates the batteries are being charged,
the control closes the isolator relay. This parallels the batteries,
charging them both. If the ignition is and the voltage falls below
12.5 volts for approximately 1 minute, the relay will open to prevent
the auxiliary loads from discharging the chassis battery. When the
voltage goes back above 13.1 volts, the relay will close again. If the
ignition is and the voltage falls below 12.0 volts for approximately 1
minute, the relay will open to prevent the auxiliary loads from over-
loading the alternator and discharging the chassis battery. When the
voltage on the chassis goes back above 13.1 volts, the relay will
close again. Allowing the batteries to stay connected together to a
lower voltage helps charge a heavily discharged auxiliary battery more
quickly with the varying output of the alternator.
A Gen Set lock-out input is provided to isolate the batteries to
prevent conflicts if both the converter/gen-set and alternator are
trying to charge the batteries at the same time. When this conflict
occurs, it can cause the dash alternator indicator light to illuminate
in error and may cause 120 volt circuit breakers to trip. If the Gen
Set is running, the chassis battery and coach battery will be
isolated. In this case the chassis battery will be charged by the
alternator and the coach battery will be charged by the Gen Set. In
the event that the chassis engine is not running, the chassis battery
is isolated and will not be discharged by auxiliary loads.
The Intellitec online pdf for this product is available in the files
section of our forum.

[Bishop at Supreme RV Service]

As a rule, we would only put the BIRD box on coaches in the event that
they had some problems maintaining chassis battery charge while park
for a period of time. There were some modifications made to the
Intellitec wiring to provide for a failsafe. The first series of BIRD
boxes were a bit fragile, and when they failed, the coach would not
charge the house batteries while in transit. I am currently digitizing
the updated schematics for the Travel Supreme Application. I will post
them shortly there after.
Bishop

On Nov 13, 9:16 am, Bishop at Supreme RV Service

[TownPug]

This explains many things. When the BIRD that I ordered arrives, will
I need any other items to install it and do you have any experienced
tricks up your sleeve to suggest? Last, & I am reluctant to ask, what
in the world would a mfr not install an isolator type product in a
coach that is "fully integrated"? Did they miss the target "full
timers" market? The isolator has been as important as a toilet!
Thank you for you assitance. We have exceeded $600 at the shop over
this matter... Chasing ghosts that were never there?

On Nov 13, 9:23�am, Bishop at Supreme RV Service

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[Bishop at Supreme RV Service]

You will need 3 12 volt diodes to make the failsafe connections. The
stance of the manufacturer orginally was that the chassis batteries
were Spartan's problem. Finish the schematic by the end of the week
and post it in the files section. It will explain everything about the
installation of the BIRD

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