NB Promovec Manual

Retrot system
Assembly/user manual

Tabel of contents
Introduction.........................................................................................4
Product Description......................................................................4
Retrot kit..............................................................................................5
Parts list..................................................................................................5
Installation guide of retrot system..................................6
Installation of hollow tech sensor......................................17
Display.................................................................................................20
Assist functions..............................................................................21
Setup of functions.......................................................................21
Troubleshooting............................................................................22
Mounting/dismounting of battery...................................23
Winter storage................................................................................23
battery capacity & use...............................................................24
Warning...............................................................................................24
Disposing of battery...................................................................25
Battery charger/charging.......................................................25
Transportation of electric bike............................................27
Battery specications.................................................................27

4
Introduction
Product description
Congratulations on purchasing our retrot system for your bike!
The retrot system is part of a new generation of ebikes, designed to convert your traditionel
bike to an electric bike. Please read this manual as it contains some important
information concerning the assembly and the use of the electric system.
Promovec Electric assist bicycle systems are manufactured according to the most recent
production technology. If you have further questions, please feel free to contact your dealer.
Your retrot system is produced according to the guidelines of the European standard EPAC
EN 15194:2017
The retrot system is only available as rear wheel conversion kit with downtube or carrier
system. The assembly of the system should follow the guidelines from this manual, or its
components can be destroyed or damaged if installed improbably. NB! The kit is designed for
bikes with 138mm chain stay and the bottom part must be 124,5mm.

5
Retrot kit
Parts list:
Description Pcs. Picture
Carrier Frame, 6 (28”), b 1
Wire for display - Carrier 1
Wire for motor - Carrier 1
Display LCD C300T
w/push throttle
1
Sensor,BB-speed compact , 1
Sensor,BB-speed, set,180 1
Motor w/wheel, rear wheel,
casette
1
Battery-unit,CAR6/2, 8,8A 1

6
Installation guide of retrot system
Bike before conversion
Start by removing the rear wheel from your bike.
Disassemble the gears from the
wheel. NB! Casette locktool & chain
whip is required.

7
Remove the disc brake. NB! If the
bike is equipped with a center lock
disc brake then it is required to buy
another disc brake
Requires the same disc size as on
the bike with 6 mounting point.
Install the disc brake by using the
5mm hex bolt on the motor (15nm).

8
Install the gears in the right order
(40nm) NB! Casette locktool is re-
quired.
Measure the length between the rear stays, if the length
is shorter than 135-138mm, the rear motor won´t t the
bike.

9
Mount the rear wheel to the frame
with a M10 nut (40nm) OBS! Lock-
washer needs to be installed from
the inside before the nut is tightened.
Locate the mounting point for the
carrier.
Reuse the screws or use 5x12 hex
bolt with washer when mounting the
carrier.

10
Remove the crank arm to mount the
speed sensor. NB! The installation of
the hollow tech sensor can be
reviewed on page “17”
Mount the speed sensor by pressing
it gently by hand. NB! A rubber
hammer can also be used without
force. Bottom bracket axel must be
124,5 mm.
Guide the wire through the bottom of
the frame.

11
Guide the wire towards the carrier.
Connect the speed sensor to the
controller. NB! The connecting wire
has a notch which should be lined up
with the plug.
Take the extension wire for the
motor and connect these together.
NB! The arrows on the wire must line
up before connecting them.

12
Guide the motor wire through the
bottom of the frame.
Guide the motor wire towards the
carrier.
Connect the motor wire NB! The
arrow on the wire must point
downwards

13
Mount the display NB! The display is
mounted by sliding it onto the
handlebar. Removing the grip and
brake lever is a must!
Take the extension wire for the
display and connect these together.
NB! The arrows on the wires must
line up before connecting them.
Guide the display wire through the
bottom of the frame. NB! The wire
should follow the brake cable before
guiding towards the carrier.

14
Guide the display wire towards the
carrier and connect it to the
controller
Ziptie the display wire with the brake
cable or use the spiral tape for an
OEM look.
Ziptie the display wire with included
cable guide.

15
Ziptie the motor wire along the chain
stay.
Ziptie all the wires towards the
carrier. NB! Wire to be rm against
the seat tube.
Any excess wires can be rolled up in
a bundle or be hidden under the
bottom bracket.

16
Mount the battery OBS! Turn the key
to unlock position before mounting
the battery
Lift the bike from the ground before
testing the system. If any errors are
displayed please review the
troubleshooting section of this
manual. Enjoy your converted bike!

17
Installation of Hollow tech sensor
The retrot kit is also available with the hollow tech sensor, which can be
installed by the following steps below.
Start by removing both crank arms
and set to mount the hollow tech
sensor.
Install the sensor ring by placing the
tap

18
It is recommened to adjust the
sensor with the spacer before
mounting the speed sensor to the
bottom bracket thread hole.
The space between the sensor and
the ring must be 2mm.
Install the sensor on the chain side
with the sensor pointing downwards.

19
Install the crank set and the
remaining crank arm. NB! Guide the
wire as the speed sensor shown in
page “10” and follow the remaining
steps.

20
Display
The display is operable by 3 buttons from the left side of the handlebar.
Note that the indicator may uctuate depending on driving whether you are
driving uphill, accelerating or driving downhill.
Error codes are intergrated to the display and is displayed by error codes.
NB! The button can be used to switch between various functions, such
as trip counter, travel time and speed.
On /o button
Choice of functions
Up/light button
Down button
Push throttle