Quantrax Computherm E Series User manual

Operating instructions
COMPUTHERM E280FC
programmable digital Wi-Fi fan coil
thermostat for 2- and 4-pipe systems
COMPUTHERM E Series

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TABLE OF CONTENTS
1. A general description of the thermostat 5
2. Important warnings and safety recommendations 6
3. Information appearing on the display of the thermostat 9
4. Functions accessible in the phone application 10
5. Location of the thermostat 11
6. Connection and installation of the thermostat 11
6.1. Connection of the device(s) to be controlled 12
6.2. Connection to the electrical network 13
6.3. Mounting the thermostat 13
7. Internet control setup 14
7.1. Installing the application 14
7.2. Connecting the thermostat to a Wi-Fi network 15
7.3. Connecting the thermostat to a user account 17
7.4. Controlling the thermostat by multiple users 17
8. The basic operation of the hermostat 19
9. Basic settings 20
9.1. Renaming the thermostat assigned to the application 20
9.2. Disabling further connections of the thermostat
assigned to the application 20
9.3. Deleting the thermostat assigned to the application 21
9.4. Setting the day and time 21
9.5. Locking operating buttons 22

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10. Operation-related settings 23
10.1. Selecting the temperature sensor (DIF) 26
10.2. Calibration of the temperature sensor (ADJ) 26
10.3. Antifreezing (FRE) 27
10.4. Memorizing settings in the event of a power failure (PON) 27
10.5. Switching between heating, cooling and ventilation modes (FUN) 28
10.6. Fan tempereture based control (FAN) 28
10.7. Programmable fan speed (PFS) 29
10.8 Selecting heating/cooling system type (SYS) 29
10.9. Restoring default setting (FAC) 30
11. Switching between ON and OFF positions 31
11.1. Manual mode 32
11.2. Programmed auto mode 33
11.2.1 Description of the programmed mode 33
11.2.2. Description of the steps of programming 34
11.2.3. Program change until the next switch in the program 37
12. Practical advices 38
13. Technical data 40

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1. A GENERAL DESCRIPTION OF THE
THERMOSTAT
The COMPUTHERM E280FC Wi-Fi fan coil thermostat is a device
that can be operated by a smartphone or tablet via Internet, and
especially recommended for controlling fan coil heating or cooling
systems. It can be easily connected to any 230 V operational fan coil
devices with three fan speed, and valve adjusters opening and closing
the valves.
The device can be easily controlled via both Internet and touch button
interface, and its operating conditions can be checked continuously.
The device also allows automatic control on the basis of temperatures
and times. Several thermostats that are put into operation at di󰀨erent
locations can be registered to the same account and controlled. The
thermostat has three output serves three fan control and two serves
valve adjuster controls. When switched on, one of the fan outputs
display the power grid phase and on the valve outputs 230 V voltage
is displayed.
With this product your apartment, house or holiday home heating /
cooling system can be controlled anytime and from anywhere. This
product is especially useful when you do not use your at or house
according to a predened schedule, you leave your home for an
uncertain period of time during the hating season or you intend to use

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your holiday home during the heating season as well.
The two parallel operating relays incorporated into the device simply
ensure that the thermostat also opens/closes the valve of the heating/
cooling pipeline and controlls the fan coil fan. (gure 3)
2. IMPORTANT WARNINGS AND SAFETY
RECOMMENDATIONS
•Before starting to use the device, please study carefully and
follow strictly the instructions.
• The thermostat was designed for business or household
(not industrial) use, and can be used to control any electric
device while keeping in mind the maximum output load of
the thermostat.
• Before starting to use the thermostat, make sure that the
Wi-Fi network is reliably accessible at the place where you
intend to use the apparatus.
• This device has been designed for indoor use. Do not use it
in a humid, dusty or chemically aggressive environment.
• This device is a thermostat that can be controlled via a
wireless Wi-Fi network. To prevent jamming, keep it away
from such electric equipment which may interfere with
wireless communications.

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• The manufacturer will assume no responsibility for any
possible direct or indirect damages or income losses
incurring during the use of the device.
• The device will not work without power supply, but the
thermostat is able to memorize settings. In case of power
failure (outage) it can resume operation without any external
intervention after the power supply is restored, provided that
this option has been chosen among settings (see Chapter
10). If you intend to use the device in an environment where
power outages occur frequently, for safety purposes we
propose you to control proper operation of the thermostat
regularly.
• Before actually starting to control the device connected
to the thermostat, make sure that the device is perfectly
functioning when it is controlled by the thermostat and
it can be operated reliably.
• The software of the thermostat and the telephone application
is constantly upgraded and updated. For proper operation
please check regularly whether there is any accessible
software or telephone application update, and always use
their latest version. Due to constant updates it is possible

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that some functions of the device and the applications
operate and appear in a way other than described in these
instructions for use.

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Figure 1.
3. INFORMATION APPEARING ON THE
DISPLAY OF THE THERMOSTAT

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4. FUNCTIONS ACCESSIBLE IN THE PHONE
APPLICATION
Figure 2.