Therm-X MVHRU HR95
Technical Manual
Page 10 of 59
Version 2.4, 25/09/2020
2.10.3.
OTHER CONTROL FEATURES
In addition to the basic ventilation and temperature
control the Therm-X controller offers a range of
features to extend the functionality, facilitate
commissioning operation and maintenance of the
equipment.
Safety
FIRE MODE interlock with BMS
Soft start up
Frost protection of the heat exchangers
Overheat protection of the electric heaters
Condensate tray overflow protection
Fault and emergency alarms on the handheld
controller
Memory of last operational state in event of
power outage
Commissioning
Automatic calibration of filters and fans during
commissioning
Component test mode
PID tuning
Maintenance
Continuous monitoring of the filter status
Dirty filter alarm
External control
External enable/disable, error and run
signalisation relay contacts
Control of external
heat pump
via ON/OFF or
proportional 0-10V enable, error and defrost
signal
Control of up to two
external shut-off dampers
(can be ordered from Barkell, installation and
wiring by others on site)
Control of 2
nd
external pre-heating coil
–
water
or electric (can be ordered from Barkell,
installation and wiring by others on site)
Control of 2
nd
external post-heating coil
–
water, electric or direct expansion (can be
ordered from Barkell, installation and wiring by
others on site)
For further information about the external control
functions of the Therm-X controls please contact our
offices.
2.10.4.
COMMUNICATION
The unit can be set-up and controlled via the
handheld touchscreen controller supplied or via the
BMS.
Handheld Controller
The handheld control panel is
a powerful tool for setting up
and operating the Therm-X
units.
End user level functions:
Adjusting operational parameters
–
set point
temperature, airflow
Activate BOOST MODE
Set TIME SCHEDULING
Display alarms and faults in detail
Monitor the unit operation
Near Field Communication (NFC)
Commissioning level functions:
Full set-up and calibration of the unit
Select and set up ventilation modes
Set-up secondary ventilation modes
–
BOOST,
TRICKLE, FREECOOLING
Set airflow offset, temperature limits, etc..
Test individual components
Set end-user level access protection
The hand-held controller has a fully touchscreen
based interface with full RGB colour scheme and
supports NFC communication.
The controller must be wired to the unit with a
suitable communication cable (not supplied by
Barkell, UTP CAT5 cable as minimum, by others on
site) not exceeding a length of 50m.
BMS integration
BMS integration is provided by connecting the unit
control panel through a
BacNet TCP/IP
,
MODBUS
RTU (RS485)
and
MODBUS TCP/IP
protocol
allowing full control and monitoring of the unit.
Other protocols can be enabled with the use of an
gateway converter (not sold by Barkell, must be
programmed by a BMS or controls specialist).