Overview; Bafang Drive System - DEMA IMPERIA Operation And Maintenance Manual

1. Overview

Your DEMA E-bike meets the requirements of European standards EN 15194 and EN 4210-2,
thus falls into category EPAC (Electrically Power Assisted Cycle = „bicycle with auxiliary elec-
tric propulsion"). In terms of the law on road traffic, EPAC is considered a standard bicycle and
no driving license is required. Maximum continuous rated engine output for EPAC bicycles is
limited to 250W. Assistance is activated by pedaling, then engine assistance is discontinued
when cyclist stops pedaling or when the E-bike speed reaches 25 km/h. E-bike can also be
set in motion with the "walk mode" button to the maximum allowed speed of 6 km/h (only
for assistance when walking). The construction allows to full deactivation of engine assistance
and continue to ride as on standard bicycle without any assistance. The electric drive system
guarantees IP54 protection.
Charging device
Use only the original charging device. The charging device should only be used in a dry location
and should not be covered during its operation. If not followed, charging can lead to a fire or
a short circuit. Always disconnect the charging device from the power supply before cleaning.
Maintenance and care
Only a authorized seller may perform maintenance and care operations on parts that conduct
electricity! Use only factory originals or parts approved by the manufacturer as replacements
on your E-bike. Otherwise, warranty and liability are not accepted. Remove the batteries from
the E-bike before cleaning it. When cleaning the battery, make sure that it does not touch any
conductive surfaces to prevent injury and damage of the battery! Cleaning with high-pressure
water jet can damage the electric equipment and water could get inside due to high pressure,
even to insulated components. Make sure not to damage cables or any other components. In
case of any damage, get your E-bike inspected by your authorized seller. In case of damage of
the E-bike must not be used without a technical inspection at authorized seller!
Wear and liability
Please bear in mind that the parts of the E-bike are exposed to higher rate wear than those of
a standard bicycle without electric drive. The reason for this is the higher weight and higher
average speed of the E-bike. A higher rate of wear does not constitute a defect of the material,
and the warranty does not cover it.
Parts most exposed to wear
- Tires
- Spokes
- Brake pads
- Chain
- Cassette
The battery also ages, and is therefore considered as a wearing part. Bear in mind that over
time the battery will lose its capacity. Consider this when planning a trip and take a spare
battery with you, if necessary. You can purchase a spare battery from your authorized seller.
Warning:
Do not change the permanent rated power of 250 W and the maximum speed of 25 km/h of
the E-bike electric drive. This change cancels all warranties for modified E-bike!
28 EN E-bike operation and maintenance manual

1.1. Bafang drive system

Bafang engines offer a smooth and quiet running with a torque power up to 50 Nm. The mid-
drive engine constantly delivers relevant information at a frequency of up to 80 kHz via a torque
sensor and two speed sensors which are highly sensitive. These sensors transmit data to the
control unit that immediately detects the most effective assistance depending on the chosen
level of the assistance.
Cycle computer DP C18 with a 3.6" wide screen is a simple display equipped with high contrast
technology.
Engine
Model
Rated voltage
Rated power
Maximum torque
Operating temperature
Storage temperature
Cycle computer
Model
Rated voltage
Operating temperature
Storage temperature
Water-proof grade
Battery
Model
Rated voltage
Capacity
Energy
E-bike operation and maintenance manual
M300
36 V
250 W
50 Nm
-20 ~ 45 °C
-20 ~ 70 °C
DP C18.CAN
E-bike battery
-20 ~ 45 °C
-20 ~ 70 °C
IP65
LG MJ1
36 V
17,5 Ah
630 Wh
EN 29