INSTALLATION MANUAL AIR HEATER TYPE EH 11
5.
Operating the air heater
5.1. Minimum firing time
The heater will always fire for a minimum of 4
minutes, even if the heat demand stops. This
is to avoid a large number of start and stops
.
5.2 Delta-T-regulation
The air heater can function as a de-
stratification fan. This is called delta-T
regulation and it is done via the room
thermostat, with a temperate measurement
sensor that is located on the air heater
The system fan is activated when the
temperature-difference between the sensor
on the heater (the delta-T NTC sensor) and the
sensor in the thermostat is bigger than 8
o
C
(standard factory setting). This procedure
ensures an even distribution of temperature
throughout the building, thus acting as a fully
automatic de-stratification fan.
5.2.1 Switch off delta-T-regulation
Delta-T regulation can be switched off when it
is not desired (e.g. when it causes discomfort).
This can be done in the
Settings
menu on the
room thermostat. See the user manual of the
special Room thermostat for more
information.
Delta-T regulation is
automatically switched off when the delta-T
sensor (sensor terminal J6) is disconnected.
5.3 Summer ventilation
The fan can be set to run in the summer.
Follow the instructions in the user manual of
the special Room thermostat.
5.4 Overheating protection
The air heater's heating elements are
protected from excessive temperatures.
5.4.1 Heating Elements
An NTC sensor is located near (or on) the
heating element. This sensor monitors the
heating element’s temperature
.
If the heating element becomes too hot, this
sensor will cause the heating process to stop.
Depending on the temperature, the air heater
performs the following actions:
• Step 1:
Power reduction (when possible).
• Step 2:
Burner stop, followed by an
automatic restart when cooled down.
• Step 3:
Burner stop, followed by a Lock
Out. A manual reset is required.
A manual reset can be
done on the electronic circuit board or
remotely with the special Room
thermostat
.
6
Commissioning the air
heater
6.1 Adjusting the settings
Prior to packaging, the safety and functioning
of each air heater is checked in detail. In
general, the heater does not need to be
adjusted after installation. Follow these
instructions:
1.
Switch on the electric supply with the
maintenance switch.
You are now able to observe the first start-up
and become familiar with the functioning of
the heater.
2.
Instruct the end user of the about a
safe use of the air heater:
a.
The location of the
maintenance switch.
3.
Instruct the end user about the
operation of the heater:
a.
Lock-out indication.
b.
Reset