Electrical Connection; Room Thermostat - Winterwarm DXE80 Installation Manual

For United Kingdom only:
The supply line for gas must comply with the Gas
Engineers publications UP-1 and UP-2, as well as with BS
6891.

4.4. Electrical connection

The electrical installation must comply with local and
national requirements as well as IEE regulations.
4.4.1. Power supply
The air heater requires an earthed power supply of 230 V/
AC. A supply of 400 V/AC + Neutral is optional. The control
circuit is a two wire low voltage bus communication.
Figure 3 - The air heater's connection clamps
• The heater must be electrically isolated during
servicing. Use an isolation switch (min. 3 mm
contact opening gap), a power plug or a non-
switched fuse spur. See the electrical wiring
diagram in §11..
4.4.2. Fuse
One fuse is present on the air heater's control board (see
the electrical wiring diagram in §11.).
• When replacing this fuse, always use one of the
same type (5AT).

4.5. Room thermostat

• by an ON/OFF signal;
• through a bus communication system with an
external interface.
4.5.1. Installation requirements
Following these requirements when placing the thermostat
to ensure the heater functions correctly:
• Make sure that air can circulate around the
thermostat.
• Make sure the sun does not shine directly upon the
thermostat.
INSTALLATION MANUAL AIR HEATER TYPE DXE
• Do not place the thermostat on a cold wall.
• Place the thermostat on an inner wall free from
draught.
• Never place the thermostat within the throw of the
heater.
• Never mount the thermostat near the aerials of
internal communication networks. These emit
radiation that can disturb the thermostat. Keep
several meters distance.
In all cases, the communication between the heater
and the thermostat is based on a two wire, low-voltage
connection. (see the electrical wiring diagram in §11.).
Follow these instructions to prevent malfunction of the
installation and damage to the thermostat or air heater:
• Use a cable with the following specifications:
– Signal cable.
– Shielded and twisted.
– Minimum dimensions: 1 x 2 x Ø0,8 mm
– Maximum length: 200 m.
CAUTION! Keep the thermostat cable separated from the
mains cables.
CAUTION! Connect the cable's earth shield only to the
earth terminal inside the air heater. Do not connect the
other end of the cable's earth shield.
NOTICE A cable with a thickness of less than 0.8 mm will
result in a poor signal.
NOTICE A cable that is not shielded and twisted may
result in a disturbed communication in an EMC-unfriendly
environment.
4.5.2. Bus communication system installation
To connect the air heater to a bus communication system,
do the following:
1. Connect the two control wires to terminals 4 and
5 (see figure 4 or the electrical wiring diagram in
§11.).
2. Set the S1 and J14 switches on the control unit as
follows (figure 5 / 6):
a. Set S1 to 1.
b. Set J14 to 1.
NOTICE The air heater must be switched off when setting
the switches. Otherwise the settings will have no effect.
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