User manual

Installation instructions
Installing the receiver
Whatever Graupner receiver system you use, the
procedure is the same.
Note that the receiver antennas must remain
at least 5 cm from all large metal parts or
wires that do not come directly from the
receiver. In addition to steel parts, this includes carbon
fiber parts, servos, fuel pumps, every kind of cable, etc.
It is preferable to install the receiver away from all other
installed parts at an easily accessible location in the
model. Servo cables may not be wound around
antennas or run next to them.
Note that the cables can shift under the influence of
acceleration during flight. You therefore need to make
sure that the cables cannot move to be directly adjacent
to antennas. Moving cables can interfere with reception.
Tests have shown that installing an individual antenna
vertically yields the best results for distant flights. In the
case of diversity antennas (two antennas), the active
end of the second antenna should be at a 90° angle
from the end of the first antenna, and the distance
between the active ends should ideally be more than
125 mm.
If the fuselage are made of carbon fiber, the ends of the
antennas should extend from the fuselage by at least
35 mm. In both cases, the approx. 145 mm standard
antennas for HoTT receivers should be exchanged with
antennas that are 300 mm or 450 mm long (order No.
33500.2 and order No. 33500.3, respectively).
The connectors identified as "X+B-" on the GR-24 HoTT
receiver that comes with the set are for the battery. The
power supply runs through all the numbered connectors,
and the power can in principle be supplied through any
of the 12 connectors. If applicable, use a V or Y cable
(order No. 3936.11).
Due to the additional power loss, perpendicular
connectors 8 … 10 of the GR-12 receiver should not be
used to connect to a receiver battery.
The function of each channel is determined by
the transmitter and not the receiver. The channel
assignment can be changed in the receiver by
programming using the "Telemetry" menu. It is however
recommended to do this on the transmitter using the
"Output swap" option, see page 96.
To follow are a few examples and suggestions for
installing remote-control components in the model:
1. For flying models, the receiver is installed behind
a strong bulkhead and is protected against dust
and splash water in car and ship models. When
you install your receiver, make sure that it is not
excessively airtight to prevent it from overheating
during operation.
2. All of the switches must be installed so that they
are not influenced by exhaust or vibration. The
switch knob must be freely accessible over its entire
operating range.
3. Install the servos on rubber grommets with tubular
brass spacer to protect them from vibration. Do not
overtighten the fixing screws; this could counteract
the vibration protection provided by the rubber
grommets. The system offers both safety and
vibration protection for your servos when the servo
fixing screws are properly tightened. The following
figure shows how to correctly mount a servo. The
tubular brass spacer are inserted from below into the
rubber grommets:
Servo mounting lug
Retaining screw
Rubber grommet
Tubular brass spacer
4. The servo arms must be freely movable throughout
their operating range. Make sure that no linkage
parts block the free movement of the servo.
5. Connect the receiver's power supply cable(s) and the
servo connecting cable to the receiver as follows:
They should never be connected as follows:
NOTE:
With GR-24 receivers, servos or other
components are only connected
horizontally at connectors 8, 9 and 10.
Components and in particular the receiver battery
must never be connected flat as shown in the figure
to the other connectors to 1 to 7 and 11 and 12. This
will immediately short out the receiver battery,
destroy the other connected components, and
immediately void all warranties.
In contrast, the sequence for connecting the servos
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Installation instructions
S1006_mz-24.3.en.indd 34 17.12.2014 15:21:23