Bob,
The wire numbers are :-
a) 10..28 are 12 V Warning light red "Boost" (28 is the positive side
and 10 is the negative side)
The newest English installation manual has an error here. The older
English manual is correct and is also identical with the newest German
installation manual.
b) 11..35 are 12 V Warning light orange "Caution" (35 is the positive
side and 11 is the negative side)
For a+b: Caution !!! Do not connect the negative side to ground and do
not connect the positive side to +12V bus!!!
c1) 25 goes to the aircraft ground bus
c2) 1 goes via a 2 amp fuse to your 12 V bus
c3) 14 + 2 is for the 2 pole servo isolation switch. The isolating
switch has to be installed directly into the lines from the 36 pole plug
receptacle to servo motor. Be careful not to change the polarity. Cut
firs wire and connect to the switch before you move to the second one.
d) two yellow shielded alternator output and go to the G terminals of
the regulator. No polarity required but do not connect them together
into one terminal?
You find very detailed information in chapter 19 of the 914 installation
manual. Again, caution with chapter 19.4.10 of the Juli 01/2006 manual.
The polarity has been marked wrong in the English translation.
Best regards
Michael Grass
A266 Trigear, Detroit
----- Original Message -----
From: R.C.Harrison
To: europa-list@matronics.com
Sent: Monday, June 11, 2007 12:42 AM
Subject: Europa-List: Rotax Circuit Wiring....... Help would be best
and most appreciated ? or ident key would help !
Hi! Guys.
Apart from about 6 months getting psyched up about the Rotax and all
associated with it I've been a couple of days and have done the
temperature and pressure instrumentation connections (or what I haven't
done I have no problem over!)
NOW I'M BORED AND WANT THIS BIRD BACK IN THE AIR so I can sleep nights
without wakening and having brain traumas.
However really I'm quite a "bo bo" on electrics except I do have a
fair capability with the English language and so am quite able to know
that switches and wires all need connecting to indicator lights(some
warning) all in an organised plan with positive buzz and negative buzz
origins all with suitable fuses etc. (oh ! and momentarily "push to
break" buttons too!) and ignition port and starboard "mag switches"
grounded at both ends and so on, also..
I have the Europa /Rotax BASIC electrical circuit diagram on which,
(in spite of having adequately driven a Jabiru !) is common with my
panel set up, so now instead of trawling through pages of Rotax
Installation CD all I need is a "paint by numbers" guide as to where a
mere hand full of wire "pairs" are supposed to be connected which are
all numbered as below.
Is there please anyone (Rotax electrically competent!) able to assist
me with marrying the blessed wire numbers with what their useful and
correct destination should be ?
The wire numbers are :-
a) .... 10..28 are ...........and go to...... ?
b) ......... 11..35 are ...........and go to...... ?
c) .... 25..14 are ...........and go to...... ?
d) ....two yellow shielded..........and go to ...... ? ( I guess
between the Alternator and regulator but I thought the mag wires needed
shielding which ever they are?)
Oh! and that brings to mind the fact that my mag. switches are already
grounded but where do I ground the other end ..when I find the shielding
?
Of course wires 19.31.7 and 14..2 all link the turbo waste gate
operational motor with the Turbo Control Unit. Rotax were kind enough to
have preassembled that !
Here's hoping I get some response this time since I received a stony
silence over my previous posting raising the question of "preferable
rotational timing" of a three blade propeller to the "top dead centre"
position of No 1 cylinder firing stroke ? (on a 4 cylinder Rotax!)
Best regards
Bob Harrison G-PTAG still sat in the garage after past 12 months and
counting !
Robt.C.Harrison
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