14
4.16. Installing electric heater / pre-heater
•
During mechanical installation and electrical connection follow the manual supplied with this
optional accessory.
•
Electrical connections may only be made by a qualified electrician authorized to service power
supply networks.
4.17. Installing manometers to control constant flow and constant
pressure
During mechanical installation and electrical connection follow the manual supplied with this optional
accessory.
5 . E l e c t r i c a l c o n n e c t i o n , c o m m i s s i o n i n g ,
d e s c r i p t i o n o f c o n t r o l s
•
The electrical equipment of the unit is designed by following standards in effect for electrical
connections to power supply network TN-C, TN-S, TN-C,S. The appliance may only be connected
by a qualified electrician. The appliance is provided with external connections for equipotential
bonding.
•
The wiring diagram of the equipment is shown in the documentation supplied along with the unit.
Instructions for and the diagrams of electrical connections of optional accessories are included in
the documentation sets of these accessories.
•
The power supply line to the equipment must be provided with a disconnecting device - a service
switch for disconnecting from power supply - the opening contacts of which are at least 3 mm
apart at all poles. This disconnecting device must be installed within an appropriate distance from
the appliance. The protection device included as a standard with delivery may act as such a
disconnecting device provided that the switchboard is located within reach of the appliance.
•
Commissioning may vary depending on the type of control system. Commissioning is carried out
by a trained technician following the separate documentation set included.
•
The controls are described in a separate guide on operating the control system.
The unit is to be protected using a breaker with characteristics "
C
".
In case of using additional overcurrent protection against accidental direct or indirect contact, it is
necessary to use a
special
circuit breaker designed for frequency inverters and switching
sources. It is a protector sensitive to alternating pulsed DC
residual currents, resistant to current
surges 5 kA.
6 . H y g i e n i c i n s t r u c t i o n s f o r c o m p l i a n c e w i t h V D I
6 0 2 2
6.1. General
instructions
Ü
Basic hygiene-related requirements are outlined in the Chapter 4.2.
Ü
The appliance has been manufactured in a hygienic design that complies with all requirements of
the VDI 6022 standard for the hygiene o HVAC device. In order to meet those requirements during
operation it is essential to ensure for the appliance to be operated, maintained, inspected and
cleaned by sufficiently qualified personnel in accordance with instructions contained in the
operation and maintenance manual. It is also essential to ensure for the remaining components of
the HVAC system (HVAC distribution systems, distribution elements, ancillary devices, noise
silencers etc.) to meet all hygienic requirements of the VDI 6022 standard and be operated in
compliance with those requirements.
Ü
If long-term high relative humidity (short-term more than 90 % or more than 80 % for three
consecutive days) is likely to occur with the subsequent moistening of filters (e.g. in areas with
frequent fogs, frequent and long rains, flying snow etc.), suitable measures must be taken to
prevent microbiologic growth. Recommended measures include more frequent hygienic checks as
per VDI 6022 or shorter filter replacement intervals. Another option is the preheating of air using
