Ventilation units with heat recuperation
DUOVENT
®
MODULAR DV/RV
37
6.3.3 INSTALLATION
IP20 protection controllers are designed for installation in an indoor dry environment without aggressive chemicals in normal areas according
to ČSN 33 2000-3, ambient temperature up to 30 °C. The short-circuit resistance of the Digireg
®
switchboard is 6 kA.
The distribution board
Cross-sections of power cables (fans,
pumps, electric heaters…) must be designed according to specific installation conditions in accordance
with ČSN 33 2000-5-52 ed.2.
The installation must be carried out by an authorized person working on electrical equipment in accordance with legal requirements and familiar
with the function
of the individual components of air conditioning and control. Observe the valid ČSN during installation.
An initial inspection
must be performed before commissioning.
For the assembly and installation of air conditioning, an authorized project of air conditioning and
M&R is required, which solves both the air outputs and the piping system, as well as the electrical connection of elements and operating
modes.
The actual commissioning and setting of the basic parameters of the controller must be performed by an authorized company with authorization
and training from
S&P UK V
entilation Systems Ltd
.
The cables must be secured outside the unit against being pulled out in the installed bushings.
The cable routes of safe and mains voltage must be separated due to electromagnetic compatibility requirements. It is necessary to build 2 cable
routes at a distance of at least 20
–30 cm from each other, if possible with a minimum of crossing. A grounded metal partition in the entire height
of the metal grounded gutter is also permissible
If the main supply has a conductor cross-section of less than 6 mm
2
, we recommend connecting the controller to the earthing system with a
copper conductor with a cross-section of at least 6 mm
2
due to the impedance of the earth conductor for high-frequency interference. We
recommend to fit the power supply with surge protectors.
It is necessary to check the function of all connected elements, especially emergency inputs, the direction of rotation of the fans, the correct
phasing of the damper actuators and mixing valves. If the unit is equipped with Digireg
®
control system directly from the factory, a SETPACK
test package has been performed on the unit. SETPACK covers basic settings of control system parameters and testing of all peripherals.
6.3.4
TECHNOLOGY SCHEME OF DIGIREG
®
I&C SYSTEMS
Legend to the diagrams:
S1 room temperature sensor
S2 supply air temperature sensor
S3 temperature sensor for frost protection of water heating
S4 temperature sensor for exhaust air
S5 exhaust air temperature sensor
S6 pressure sensor on the supply filter
S7 drain filter pressure sensor (optional)
S8 thermostat as protection against freezing of the direct evaporator
S9 supply fan pressure sensor (mandatory - monitors fan operation)
S10 intake air temperature sensor
S11 recuperator icing sensor
S13 outdoor temperature sensor (enable condenser unit operation)
V1 supply fan
V2 exhaust fan
KL1 inlet flap actuator (circulation)
KL2 outlet flap actuator (can be coupled with KL1)
KL3 recuperator bypass actuator
KL4 mixing actuator for integrated flaps
ST1 heating water mixing valve actuator
ST2 cooling water mixing valve actuator
KJ condensing unit
PR control of the rotation exchanger drive
!
CAUTION!
For recuperation units delivered with free standing Digireg
®
control box, which is not fixed to the unit wall, it is necessary to
provide firm housing of the cable harness between the unit and control box in the firm cable line (such as cable trays, cable
bench etc.). The cable harness between the unit and the control box shall not be freely suspended or positioned on the floor!!!
On laying of the harness it is possible to start the works on connection of individual wires to the Digireg
®
control box.
!
CAUTION!
Digireg
®
distribution boards are not designed for
direct installation to the flammable material!
